Millet/peanut intercropping at a moderate N rate increases crop productivity and N use efficiency,as well as economic benefits,under rain-fed conditions

Cereal and legume intercropping has been widely adopted to increase crop productivity in sustainable farming systems worldwide.Among different intercropping combinations,millet and peanut intercropping can be adapted to most waterlimited areas.However,there are few studies on the differences in yield characteristics and nitrogen use efficiency between millet/peanut intercropping and monocultures under different nitrogen (N) application rates.The objective of this study was to determine the yield advantages and economic benefits,as well as the appropriate N application rate,of millet/peanut intercropping.A two-yearfield experiment was conducted with three cropping patterns (monoculture millet,monoculture peanut and millet/peanut intercropping) and four N rates (0,75,150 and 225 kg ha^(-1)).The results showed that the land equivalent ratio (LER) and net effect (NE) of the intercropping system reached their highest levels at the N input of 150 kg ha^(-1)in 2018 and 2019 (1.04 for LER,0.347 Mg ha^(-1)for NE,averaged across two years).Millet was the dominant crop in the intercropping system (aggressivity of millet and peanut (Amp)>0,competitive ratio of millet and peanut (CRmp)>1),and millet yields achieved their highest values at N inputs of 225 kg ha^(-1)for monoculture and 150 kg ha^(-1)for intercropping.NUE reached its highest levels with N inputs of 150 kg ha^(-1)for all planting patterns over the two years.Intercropping combined with an N input of 150 kg ha^(-1)achieved the highest net income of 2 791 USD ha^(-1),with a benefit-cost ratio of 1.56,averaged over the two years.From the perspective of economics and agricultural sustainable development,millet/peanut intercropping at 150 kg N ha^(-1)seems to be a promising alternative to millet or peanut monoculture.

Production Mode and Economic Benefit of Improved No-tillage Intercropping with Potato in New Mode Citrus Orchard

[Objectives]In terms of increasing the utilization of land in agriculture and the per unit area yield,intercropping is the most popular farming method.[Methods]Based on the climate and soil conditions in Zhaoqing,this experiment explored the improved mode of no-tillage intercropping winter potato with citrus in the new high-ridge,wide-row and dense-plant cultivation mode citrus orchard.Taking the conventional tillage and film-mulched intercropping as the control,it studied the adaptability of intercropping,evaluated the quality,and analyzed its economic benefits.[Results]The early emergence rate of improved no-tillage intercropping cultivation was slightly higher than that of conventional tillage and film-mulched intercropping,but the difference of final emergence rate was not significant,indicating that improved no-tillage intercropping cultivation could provide excellent potato emergence environment.Under the conventional tillage and improved no-tillage intercropping cultivation mode,the change trend of the potato's plant height,main stem thickness,crown diameter and number of leaflet is the same.The change rule of the crown diameter of the film-mulched intercropping cultivation method is similar to that of the plant height,both have a large increase in the late growth stage.The potato yield of improved no-tillage intercropping cultivation were 22747.5 kg/ha,and the proportions of potatoes of each grade were 11.85%,35.61%,37.63%and 14.91%,respectively.The content of dry matter,Vc,soluble protein,starch and amino acid in the main nutrients of the potato under the improved no-tillage intercropping mode is not significantly different from that of the film-mulched intercropping cultivation.The changing trend of reducing sugar content showed that the reducing sugar content of no-tillage intercropping cultivation was the highest(0.466%).Through evaluating the eating characteristics of potatoes from the flavor,taste,texture and appearance after chewing,the three cultivation methods have little difference.In the no-tillage intercropping cultivation technology,the growth of potatoes consumes part of the nutrients in the soil between the rows of the citrus orchard,but it does not exerts a significant impact on the surrounding citrus trees.Compared with the film-mulched intercropping cultivation,the improved no-tillage intercropping cultivation method does not require the expense of mulched,the cost of fertilizer is low,and labor costs are saved,so a net income of 27075 yuan/ha can be obtained.[Conclusions]From the perspective of orchard intercropping,it has achieved the effect of improving soil utilization and increasing output without reducing the edible quality of potatoes.

Effects of Enclosure on Grassland Ecological and Economic Benefits in Northern China

Grasslands in northern China serve the country as both an ecological barrier and a livestock production base.There,installing enclosures has been becoming the major grassland restoration measure adopted by many local governments.However,the effects of restoration on both ecological and production benefits of grassland remain unclear for implemented grassland restoration policies.Therefore,a representative rangeland in northern China,the Maodeng pasture in Inner Mongolia Autonomous Region was selected as the study area,and remote sensing monitoring analyses were carried out to quantify the ecological benefits and economic benefits from 2015 to 2021.The results showed that:1) in terms of ecological benefits,the grassland area with a grassland coverage rate of more than 60% accounts for 32.3% of the regional area,and 86.4% of its grassland grew significantly better than the same period in2015,showing a significant improvement in grassland growth.Using the average amount of carbon per unit area as the ecological benefit evaluation index,it increased by 27.1% to 32.48Tg C/yr from 2015 to 2021.2) In terms of economic benefits,both theoretical grass production and livestock carrying capacity increased from 2015 to 2021.Compared to 2015,the theoretical grass production in 2021 increased by 24.8% to 71 900 t.The livestock carrying capacity reached 52 100 sheep units in 2021,nearly 11 000 sheep units more than that in 2015.During the study period,multiple economic indicators(on a per capita basis of permanent residents) for the pastoral area of Xilinhot City to which the Maodeng pasture belongs,have grown steadily.Per capita total income rose from 29 630 yuan(RMB) in2015 to 62 859 yuan(RMB) in 2021.Relying on grassland resources to develop the pastoral ecology also broadens the potential economic development space.Overall,the establishment of the reserve and the experiment of implanting an enclosure policy have had a significant and positive impact on Maodeng pasture’s development from both an ecological and economic perspective.With the support of scientific evidence,enclosure policy can be extended to more than 110 000 km~2 of grasslands in northern China with similar precipitation and temperature conditions,enhancing the productive and ecological potential of grasslands.The above research results will contribute to the scientific formulation of grassland pasture quality improvement plans in northern China.

Strategies and Economic Benefit Analysis for Productive Landscape of Rape Flower Sea in Cold Regions

The cold regions are located in high latitudes and cold climates.The local excellent ornamental plant resources are relatively scarce.The plant species that are suitable for both ornamental and productive benefits of landscape of flower sea construction are also even fewer.Therefore,it is imperative to introduce and screen the plant resources suitable for cold regions to create the landscape of flower sea.The rape,an oilseed crop,was used as a research object in order to create a productive flower landscape with both ornamental and economic values in cold regions.Four rape flower varieties,Qingza No.5,7,9,and 11,were introduced from Qinghai Hufeng Agricultural Science and Technology Group Co.,Ltd.They were planted in the experimental practice base of Northeast Agricultural University in three batches.Development characteristics and seed yield of rape flowers on different sowing dates were studied.The fuzzy probability method was used to comprehensively evaluate the varieties.The results showed that the rape flowers grew well in Harbin City during the experimental sowing period,which could form a good landscape of flower sea and had a considerable rapeseed yield.It could be widely used in cold urban and rural areas,such as Harbin City.In view of the experimental results,the strategies of creating a productive landscape of rape flower sea were proposed and the economic benefits were analyzed.It could change the status quo of a uniform landscape of flower sea in cold regions,help the development of rural tourism,and promote local economic income.

Subsurface irrigation with ceramic emitters improves wolfberry yield and economic benefits on the Tibetan Plateau, China

Climate warming has led to the expansion of arable land at high altitudes,but it has also increased the demand for water use efficiency(WUE).To address this issue,the development of water-saving irrigation technology has become crucial in improving water productivity and economic returns.This study aimed to assess the impacts of three irrigation methods on water productivity and economic returns in wolfberry(Lycium barbarum L.)cultivation on the Tibetan Plateau,China during a two-year field trial.Results showed that subsurface irrigation with ceramic emitters(SICE)outperformed surface drip irrigation(DI)and subsurface drip irrigation(SDI)in terms of wolfberry yield.Over the two-year period,the average yield with SICE increased by 8.0%and 2.3%compared with DI and SDI,respectively.This improvement can be attributed to the stable soil moisture and higher temperature accumulation achieved with SICE.Furthermore,SICE exhibited higher WUE,with 14.6%and 4.5%increases compared with DI and SDI,respectively.In addition to the agronomic benefits,SICE also proved advantageous in terms of economic returns.Total average annual input costs of SICE were lower than the other two methods starting from the 8th year.Moreover,the benefit-cost ratio of SICE surpassed the other methods in the 4th year and continued to widen the gap with subsequent year.These findings highlight SICE as an economically viable water-saving irrigation strategy for wolfberry cultivation on the Tibetan Plateau.Thus,this research not only provides an effective water-saving irrigation strategy for wolfberry cultivation but also offers insights into addressing irrigation-related energy challenges in other crop production systems.

Effects of Maize Silage Harvest Stage on Growth Performance and Economic Benefits of Beef Cattle

[Objectives]This study aimed to investigate the effects of whole-crop maize silage harvested at different stages on growth and economic benefits of beef cattle.[Methods]A total of 30 Simmental crossbred cattle weighing about 378 kg were randomly divided into three groups,respectively fed for 70 days with whole-crop maize silage harvested at milk stage(GroupⅠ),dough stage(GroupⅡ)and physiological maturity stage(GroupⅢ).Moreover,the cattle in all groups were given the same concentrate diet.[Results]There were significant differences in dry matter,crude protein and neutral detergent fiber between whole-crop maize silages harvested at different stages(P<0.05).The dry matter in GroupⅡandⅢwas significantly higher than that in GroupⅠ(P<0.05).The crude protein content peaked in GroupⅡ,up to 6.37%,which was significantly higher than that in GroupⅠ(by 12.74%,P<0.05)and GroupⅢ(by 9.26%,P<0.05).Starch content significantly increased with the postponing of maize harvest(P<0.05).The content of neutral detergent fiber in Group I was significantly higher than that in GroupⅡ(P<0.05)and GroupⅢ(P<0.05).The average daily weight gain in GroupⅡwas 8.53%higher than that in GroupⅠ(P<0.05)and 3.70%higher than that in GroupⅢ(P>0.05).The dry matter intake in GroupⅡwas significantly higher than that in GroupⅠ(P<0.05)and GroupⅢ(P<0.05).There was no significant difference in feed/gain ratio between the groups(P>0.05).The economic benefit in GroupⅡwas the highest,up to 9.99 yuan/day per capita.,followed by that in GroupⅢ,9.79 yuan/day per capita,and that in GroupⅠwas the lowest,only 8.03 yuan/day per capita.[Conclusions]The whole-crop maize silage harvested at dough stage has the best quality and produces the highest economic returns for beef cattle.

Effects on Agronomic Traits,Yield and Benefit of One-year Triple Cropping "Maize-soybean" Strip Intercropping System Under Reduced Fertilizer Application

[Objectives] This study was conducted to investigate the effects on agronomic traits,yield and benefit of one-year triple cropping " maize-soybean" strip intercropping system under reduced fertilizer application. [Methods]A single factor randomized block design was used,and wide and narrow strip intercropping was adopted. Three different fertilization treatments,namely fertilizers for conventional field fertilization( A1),80% A1( A2) and 60% A1( A3) were applied to the field production. The fertilizing sites were about 25 cm away from maize and repeated three times. [Results]Compared with A1,the change laws of the agronomic traits and yield in the A2 and A3 intercropping systems were described as below. Agronomic traits: The plant height became shorter gradually for the spring soybean,but increased gradually for the summer soybean,the bottom pod height gradually reduced,and the node number,pods per plant and seeds per plant increased;and the plant height,ear length,rows per ear,seeds per row and 1 000-seed weight of the spring maize decreased. Yield: The yield of maize as the main crop decreased but not significant,by 3. 20% and 3. 99%,respectively in A2 and A3,both smaller than 5. 00%;the yield of the spring soybean significantly increased by 9. 70% and 11. 84%,respectively;the yield of the summer soybean increased by 5. 18% and 8. 98%,respectively;and the total yield increased by 0. 20% and 0. 92%,respectively. Benefit: The total output value increased by 2. 97 % and 4. 91 %,respectively,and the total benefit increased by 6. 39% and 11. 22%,respectively. [Conclusions] Under a 40% reduction in fertilizer applied in the field,the one-year triple cropping " maize-soybean" strip intercropping system still met the multi-target requirements of increasing grain production and economic benefits,and thus can be promoted and applied in Guangxi.

Effect of Labor Skills Training on Industrial Development and Economic Benefits of Winter Potato in Regions Inhabited by Ethnic Minorities : A Case Study of Lancang Lahu Autonomous County

Using three kinds of labor skills training methods(expert team training,recruit training and local agricultural extension center training),based on enterprise planting and farmer planting,this paper analyzes the impact of training methods on the development of potato industry,such as yield,income and planting extension.The results show that the expert team training,recruit training and labor skills training of local agricultural extension center can significantly improve the labor quality and skills,and increase the yield and income of winter potatoes.The expert team training,recruit training and local agricultural extension center training can lift growers out of poverty and improve the willingness of people to plant and extend.The winter potato industry has become one of the pillar industries to shake off poverty and become rich,increasing local economic benefits.Through labor skills training,the winter potato industry has become one of the main industries to improve the quality of the local people and increase economic income,promoting the local people to shake off poverty and become well-off.

Economic Assessment of Sugarcane (Saccharum officinarum L.) through Intercropping

Sugarcane has pronounced importance to provide sugar for more than half of the global population. World population is enhancing day-by-day and production land is in the worst situation. The cultivated land is diminishing rapidly due to urbanization, road construction, and land deterioration. This crisis demands alternate research to raise crop productivity and maximize the economic returns per unit land for feeding the gigantic population. Sugarcane is a long duration crop and gave late net economic return. Intercropping in sugarcane received much attention and need to properly manage for getting higher net return from same unit area. It is becoming popular among farming community due to resourcefully utilization of land. Intercropping has the potential to inspire the farmers to get maximum economic return per acre per annum. For intercropping, wheat, gram, soybean, and potato were used as an intercrop in September-sown sugarcane. Triple row strip planting geometry of sugarcane with four intercropped (SC + Wheat, SC + Gram, SC + Soybean, and SC + Potato) and check with sole SC was used. Sugarcane was planted during September 2011- 12 and 2012-13 at research area University College of Agriculture, University of Sargodha, Pakistan. Randomized complete block design with three replications were used. Results showed that number of millable cane, cane diameter;unstripped and stripped cane yield and crop growth rate was significantly higher in sole sugarcane when compared with different intercrop in 2011-12 while trend was same in 2012-13. Cane diameter and un-stripped cane yield were statistically at par of intercrops SC + Soybean and SC + Potato while stripped cane yield of Sole SC and SC + Potato was statistically at par in 2012-13. In both the year of study, intercrops gave higher land equivalent ratio and net return over sole sugarcane planted while sole sugarcane gave maximum benefit cost ratio compared with other intercrops.

Study on Environmental Risk and Economic Benefits of Rotation Systems in Farmland of Erhai Lake Basin

This study was designed to find out an optimised planting system of reducing non-point （source） pollution by analyzing the reasons and the factors of influence non-point pollution in farmland of Erhai Lake basin. The results showed that incomes, residual nitrogen in soil, and the loss of nitrogen in surface water in rice-garlic system were higher than those in rice-fava bean system. There were positive correlations between the nitrogen loss of farmland, nitrogen inputs, residual nitrogen in soil, and incomes of farmland. Economic benefits and environment benefits are both appropriate, if the area of rice-garlic system would be reduced to 53% and the area of rice-fava bean system increased to 36% of total cropping area in the investigated watershed. Adjustment of planting structure and introduction of reasonable rotation systems is considered an effective measure of controlling agricultural non-point pollution in watersheds of Erhai Lake.

Cassava Groundnut Intercropping: A Sustainable Land Management Practice for Increasing Crop Productivity and Organic Carbon Stock on Smallholder Farms

Cassava-groundnut intercropping is not a common practice among smallholder farmers in Sierra Leone even though both crops are well suited for intercropping. On-farm trials were conducted in three locations (Bai Largor, Bassah, and Njala Kanima) in the Moyamba district during the 2021 cropping season to investigate the efficacy of cassava-groundnut intercropping for increasing crop productivity and soil organic carbon stock on smallholder farms in the Moyamba district, Southern Sierra Leone. The experimental design was a randomized complete block design in three replications with treatments of sole groundnut, sole cassava and cassava-groundnut intercropping. Data on the yield and yield components of cassava and groundnut were analysed using the PROC MIXED procedure of SAS 9.4 and means were compared using the standard error of difference (SED). The above-ground biomass, number of roots per plant, and fresh root yield of cassava were not significantly (p > 0.05) affected by the cassava-based cropping system. Averaged across locations, intercropping cassava with groundnut decreased the above-ground biomass, the number of roots per plant, and fresh root yield of cassava by 17%, 11%, and 17%, respectively. The above-ground biomass, number of pods per plant and fresh pod yield of groundnut were significantly (p 1), the highest net revenue and benefit-cost ratio. The benefit-cost ratio was also favourable for the sole cassava (BCR > 1) but not favourable for the sole groundnut (BCR < 1). Averaged across locations, intercropping cassava with groundnut increased the benefit-cost ratio by 121% and 13% when compared to the sole groundnut and sole cassava. In the event of a 40% yield loss for the cassava and groundnut, the benefit-cost ratio was favourable (1.12) only for the cassava groundnut intercropping system. The net soil organic carbon stock was favourable only for the cassava-groundnut intercrop. Averaged across locations, the net soil organic carbon for the cassava-groundnut intercropping increased by 3.4% when compared to the baseline within one cropping cycle of the cassava (12 months). The results confirm that cassava-groundnut intercropping is a sustainable land management practice that could enhance crop productivity and soil organic carbon stock on smallholder farms.

Practice and Exploration of Economic Benefit Evaluation of Medical Equipment in Our Hospital

Objective The evaluation index of medical equipment's economic benefit is based on the usage of medical equipment,the traditional data collection method is time-consuming,laborious and not entirely accurate.The usage of medical equipment is obtained by designing data query statements from the HIS system.Methods First the charging items are in correspondence with the device's name included,second fees and other relevant data are extracted from charging module in HIS.Through a rough estimate of the recovery period and an increase or decrease ratio,the economic benefit of the medical equipment can be analyzed.Results Through the method of the benefit analysis of the medical equipment,we can clearly find out the different economic benefit of the equipment,and finally analyze the reasons.Conclusion Practice has proved that,this methad,it can greatly reduce human,material resources required in data collection and improve the accuracy of the data.It can help hospital managers timely to grasp the operating costs of medical equipment and other information,and also provide scientific data for hospital managers when they purchase reasonable medical equipment.

Effects of Soil Testing and Formulated Fertilization on Yield and Economic Benefit of Major Crops in Burundi

[Objectives]The purpose of this study was to provide technical support for high-yield cultivation of major crops in Burundi,thereby increasing local farmers'income and promoting sustainable development of agriculture in Burundi.[Methods]In the IMBO and MOSO test stations of the Burundi Academy of Agricultural Sciences and the Burundi Fruit and Vegetable Extension and Service Center,soil testing and formulated fertilization test and demonstration was carried out in rice,maize and cabbage.The test set up three treatments,soil testing and formulated fertilization(STFF),local routine fertilization(RF)and non-fertilization(CK)to investigate the effects of soil testing and formulated fertilization on the yield and economic benefit of the crops.[Results]In the plot test,the yield and net economic benefit of rice,maize and cabbage were both highest in the STFF treatment.Compared with those in the RF treatment,the yield of rice,maize and cabbage increased by 19.0%,25.7%and 33.0%,respectively,and the net economic benefit increased by 4292,2837 and 8232 yuan/ha,respectively.In the field test,the yield and net economic benefit of rice,maize and cabbage were also both highest in the STFF treatment.The yield increased by 18.1%,24.3%and 25.9%,respectively,and the net economic benefit increased by 4142,2881 and 8665 yuan/ha,respectively compared with those in the RF treatment.[Conclusions]Soil testing and formulated fertilization not only increased rice,maize and cabbage yield per unit area,but also increased farmers'income in Burundi.It is one of the important technical measures to promote the increase of agricultural production and income in Burundi.

Ecological economic benefit in sustainable development

From the concept of ecological economic benefit, I put forward the general formula for the benefit of ecologicaleconomy and the appraisal methods of the ecological economy. Theory on ecological benefit and economic benefit is thebase of the benefits of ecological economy. To some extent, the development of ecological economy, theory and practice oneco-agriculture are both the production made from opposition and unify of ecological benefit and economic benefit. Thispaper discusses the “T” type structure, which will give the theoretical bases for enhancing the ecological and economicalbenefits.

Responses of Seed Yield and Economic Benefit of Winter Oilseed Rape(Brassica napus L.) to Different NPK Ratio and Dose

Field experiments were conducted during 2008-2010 to investigate the effects of NPK fertilization on seed yield and economic benefit of a new hybrid cultivar of winter oilseed rape(Brassica napus L.)- Xiangzayou763,and to determine the optimum NPK ratio and dose in Hunan,China.The results showed that NPK ratio(1:0.50:0.50) with 180 kg/hm2 N,90 kg/hm^2 P_2O_5 and 90 kg/hm^2 K_2O was the optimum combination for the highest seed yield(2 231.13 kg/hm2) and economic benefit(9 816.97 Yuan/hm^2),of which 1 641.23 Yuan/hm^2 being set for fertilizer investment(VCR=4.11).Besides,the effects of N,P and K fertilizers on seed yield and oil production of winter oilseed rape were not identical.N had the greatest effect on plant growth of winter oilseed rape,followed by P and K.Total leaf number,green leaf number,leaf length and width,rhizome diameter,branch number,dry weight per plant and other agronomic characters in high N treatments were higher than those in low N treatments.By correlation and path analysis of yield components,the contribution rate to seed yield was found:effective silique number per plant>seed number per silique>1 000-seed weight.

Analysis of the Southern China Tilapia Production and Economic Benefits of Different Breeding Patterns in 2018

Cost-benefit analysis and breakeven point were used to analyze the production cost and economic benefit of tilapia pond monoculture and polyculture.From the aspects of tilapia production and economic benefit,this paper summarized the current production status and the characteristics of tilapia industry development and analyzed its developing trend.The results indicated that feed cost,pond rates and labor cost are the main production costs,and the production cost of polyculture is significantly lower than that of monoculture.Through comparative analysis,it is proposed that the tilapia industry should be reasonably guided to the intensive,standardized and pollution-free direction.Specifically,it is necessary to improve the coverage of improved varieties,strengthen disease prevention and control and promote the healthy farming model of tilapia.We also should strengthen the training of tilapia production techniques and the quality and safety testing of tilapia products,and accelerate the development of tilapia industrialization,so as to promote the sustainable and healthy development of tilapia industry.

Evaluating Economic Benefits of Water Diversion Project for Environment Improvement: A Case Study

The research in this paper was based on the project of water diversion from the Yangtze River to the Taihu Lake which significantly improves water environment of the lake and brings obvious economic benefits for surrounding areas. An analytical framework is developed on evaluating benefits of water supply to Huzhou city from project of water diversion from Yangtze River to Taihu Lake, including: (1) the value-added of water supply on the project are divided into four parts according to the characteristics of Hangzhou- Jiax-ing-Huzhou Plain area. (2) The utilization ratio of water diversion is defined based on the features of water resources. (3) The water supply effects on industries and residents’ living are explored using partition coeffi-cient method in Huzhou city. Grey relation technique is used to examine the relationship between water use and industrial development in Huzhou, which aims to clarify the rationality of partition coefficient method. The results indicate that benefit of water diversion from Yangtze River to Taihu Lake to tertiary industry of Huzhou city is the highest, while that of industry is the lowest.

Valuation of Economic Benefit of Regulatory Detailed Planning-- A Case Study of Unit BSP0-2601 at Shengqiao Community, Yuepu Town, Baoshan District,Shanghai City

Ideas and methods of evaluating economic benefit of regulatory detailed planning were introduced firstly,and then the framework and concrete steps of valuation of economic benefit of regulatory detailed planning were analyzed.Afterwards,the economic benefit of regulatory detailed planning was valued by using case analysis method.Finally,some suggestions of application were proposed,such as introducing the valuation of economic benefit of a third party into the adjustment scheme of regulatory detailed planning,and publicizing the scheme of regulatory detailed planning and valuation results at the same time.

On Approach of Quantifying Economic Benefits of Urban Green Space:A Case Study of Wuxi City

Urban green space has its important social, economic and ecological benefits. Quantifying of those benefits helps healthy development of urban green space. The essay discusses approach of quantifying direct economic benefits of land utilizing and construction derivated from urban green space system itself through the optimization of space structure and ecological function. It is the affirmation and promotion of the achievements of urban greening industry.

Effects of Different Sowing and Transplanting Time on Quality and Economic Benefit of Tobacco Variety Yunyan 105

In order to provide references for popularization and application of tobacco variety Yunyan 105,a field experiment was conducted to explore the effects of different sowing and transplanting time on agronomic traits,economic benefit and quality of Yunyan 105. Results showed that the agronomic characters,quality traits and economic benefit of the tobacco were relatively fine with sowing time February 4-14 and transplanting time April 1-10. Index scores of the physical properties of tobacco leaves were greater than 80 scores with sowing time February 14 and transplanting time April 10. The comprehensive index of conventional chemical compositions was 0. 39-0. 73. The harmony of conventional chemical compositions of lower leaves was the best with the comprehensive index of 0. 59 when the sowing time and transplanting time were February 4 and April 1 respectively. As for the middle and upper leaves the comprehensive indexes were respectively 0. 71 and 0. 73 with the sowing time February 14 and transplanting time April 10. The sensory evaluation of smoking quality and economic benefit were February 14 sowing and April 10 transplanting better,its taste of the tobacco leaves was pure and mild,the irritancy and the strength was less,the aftertaste was better,and the output value reached the highest 4 271. 17 yuan/667 m^2. The various sowing and transplanting time had no significant influence on appearance quality of tobacco leaves. The suitable sowing and transplanting time of Yunyan 105 was February 4-14 and April1-10 respectively in Xuanwei tobacco-growing area.