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Effect Models of Nitrogen,Phosphorus and Potassium Fertilizer Formulation in Banana 被引量:1
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作者 匡石滋 田世尧 +3 位作者 李春雨 易干军 洪炎龙 万国富 《Agricultural Science & Technology》 CAS 2010年第9期130-135,共6页
[Objective] The aim was to modify the application amount of N,P and K fertilizer so as to provide a reference for establishing balanced fertilization index system of banana.[Method]The N,P and K fertilizer "3414" te... [Objective] The aim was to modify the application amount of N,P and K fertilizer so as to provide a reference for establishing balanced fertilization index system of banana.[Method]The N,P and K fertilizer "3414" test was carried out on banana,and then regression analysis was performed on the fertilizer effect.Ternary quadratic,binary quadric and one-variable quadratic regression equations for the fertilizer effect on the banana yield were constructed.[Result]Suitable amount of N,P and K fertilizer had significant yield improving effect,whereas overdose of fertilizer application led to decreasing of utilization rate of fertilizer.Therefore,suitable amount of N,P and K fertilizer should be selected in production.It could be concluded that one-variable quadratic regression equations was the best model to calculate the suitable fertilizer amount.The best yield range of banana in the tested field was 44.193-45.904 t/hm2,while the corresponding optimum application amount of N,P2O5 and K2O was 795.1,262.3 and 1 236.9 kg/hm2 respectively,and the ratio among nitrogen,phosphorus and potassium are 1∶0.33∶1.55.[Conclusion]The result in this study could provide references for the soil types similar to the tested field. 展开更多
关键词 BANANA NITROGEN Phosphorus and potassium fertilization Fertilizer application model Optimum application amount
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Study on Optimum Fertilization Model of Potato Intercropped with Sugarcane
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作者 江泽普 廖青 +5 位作者 谭裕模 韦广泼 邢颖 汪羽宁 刘斌 梁潘霞 《Agricultural Science & Technology》 CAS 2013年第1期138-143,共6页
[Objective] The paper was to study the effects of different ratios of N, P and K on yield of potato intercropped with sugarcane in Lateritic red earth area of Guangxi, and seek the best N, P and K ratio for nutrition ... [Objective] The paper was to study the effects of different ratios of N, P and K on yield of potato intercropped with sugarcane in Lateritic red earth area of Guangxi, and seek the best N, P and K ratio for nutrition model of potato inter- cropped with sugarcane. [Method]Two field experiments adopted the optimum com- pound design (311-A) were conducted in Long'an County of Guangxi Province in 2011 and 2012, respectively. The polynomial regression models of fertilizer applica- tion and quadratic of three factors were established by SAS statistical analysis soft- ware, and optimum nutrient simulation models of potato were obtained by computer processing. [Result] The combined application of low nitrogen and mid-high potassi- um and phosphorus fertilizer contributed to higher potato yield in experimental condi- tion. The regression model of potato yield (Yll and Y12) and dosage of N(X1), P (X2), K(X3) were established by using SAS statistical analysis software, in 2011 and 2012, respectively. They were Y11 =14 725.28 -415.39X1 +741.99X2 +607.83)(3-447.92X1X2- 144.09X1X3 -405.83X2X3 -267.82X1^2-795.67X2^2 -642.10X3^2, R =0.927 2; and Y12 =14 342.60 -896.25X1 +548.62X2 +925.51 X3 +67.81 X1X2 +531.60X1X3 -99.00X2X3 -904.00X1^2 - 1121.36X2^2-596.64X3^2,R=0.926 6. The regression mathematics model of potato yields preferably fit with actual situation in the locality, and have higher practical value, so it could be used for fertilizer decision and forecast. Using the computer to carry on the optimization, the N, P and K dosage of the best potato yield intercropped with sugarcane was obtained. The dosage of N, P2O5, K2O were 108.8-140.6, 172.5-204.4 and 285.9 kg/hm2, respectively. [Conclusion] The best N, P and K ratio of potato yield intercropped with sugarcane was 1:(1.23-1.68):(2.03-2.63). 展开更多
关键词 INTERCROPPING Optimum fertilization model Sugarcane-Potato
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Studies on the Fertilization Effect and Optimal Fertilizing Amount of Brazil Banana Based on "3414" Field Trials
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作者 刘永霞 井涛 +6 位作者 唐粉玲 臧小平 郑伟 曹红鑫 鞠俊杰 王必尊 李昌鹏 《Agricultural Science & Technology》 CAS 2015年第9期1950-1954,共5页
Fertilizer effect model such as ternary quadratic, unary quadratic, straight line and platform model was respectively used to analyze the two-year "3414" test data collected from banana garden in Fushan Town of Hain... Fertilizer effect model such as ternary quadratic, unary quadratic, straight line and platform model was respectively used to analyze the two-year "3414" test data collected from banana garden in Fushan Town of Hainan Province. The results showed that the optimal fertilizing amount of ternary quadratic model simulation was0.374 kg/plant of N, 0.289 kg/plant of P2O5 and 0.891 kg/plant of K2 O. According to the yield trend characteristic, the optimal fertilizing amount of unary quadratic model was 0.400kg/plant of N, 0.214 kg/plant of P2O5 and 0.901kg/plant of K2 O. Thus it can be seen that only partial indices of the optimal fertilizing amount of ternary quadratic model simulation were higher than that of unary quadratic model. Considering the results, the optimal fertilizing amount of Brazil banana was 0.374-0.400kg/plant of N, 0.214-0.289 kg/plant of P2O5 and 0.891-0.901 kg/plant of K2 O. 展开更多
关键词 Brazil banana "3414" test the optimal fertilizing amount fertilizer effect model
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Establishment and Application of Fertilization Model for Wheat Interplanted with Cotton in Jianghan Plain
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作者 杨利 夏贤格 +3 位作者 丁亨虎 范先鹏 熊桂云 吴家琼 《Agricultural Science & Technology》 CAS 2015年第7期1429-1434,共6页
3414 field experiment (including three nutrient elements at four gradient levels, a total of 14 unrepeated incomplete treatments) was designed to study the fertilization measures for wheat interplanted with cotton i... 3414 field experiment (including three nutrient elements at four gradient levels, a total of 14 unrepeated incomplete treatments) was designed to study the fertilization measures for wheat interplanted with cotton in Qianjiang City, Hubei Province. Fertilizer model for wheat interplanted with cotton in Jianghan Plain was finally established, based on which the soil nutrient indices in wheat-cotton inter- planting field were screened; and optimal nitrogen, phosphorus and potassium appli- cation for wheat was put forward as 130-210 kg/hm2 N, 40-70 kg/hm2 P2O5 and 40-60 kg/hm2 K2O. 展开更多
关键词 WHEAT Fertilizer model 3414 fertilizer experiment Jianghan plain
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Long-term organic and inorganic fertilizations enhanced basic soil productivity in a fluvo-aquic soil 被引量:8
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作者 ZHA Yan WU Xue-ping +5 位作者 GONG Fu-fei XU Ming-gang ZHANG Hui-min CHEN Li-ming HUANG Shao-min CAI Dian-xiong 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2015年第12期2477-2489,共13页
The improvement of soil productivity depends on a rational input of water and nutrients, optimal field management, and the increase of basic soil productivity(BSP). In this study, BSP is defined as the productive ca... The improvement of soil productivity depends on a rational input of water and nutrients, optimal field management, and the increase of basic soil productivity(BSP). In this study, BSP is defined as the productive capacity of a farmland soil with its own physical and chemical properties for a specific crop season under local field management. Based on 19-yr data of the long-term agronomic experiments(1989–2008) on a fluvo-aquic soil in Zhengzhou, Henan Province, China, the decision support system for agrotechnology transfer(DSSAT ver. 4.0) crop growth model was used to simulate yields by BSP of winter wheat(Triticum aestivium L.) and summer maize(Zea mays L.) to examine the relationship between BSP and soil organic carbon(SOC) under long-term fertilization. Five treatments were included:(1) no fertilization(control),(2) nitrogen, phosphorus and potassium fertilizers(NPK),(3) NPK plus manure(NPKM),(4) 1.5 times of NPKM(1.5NPKM), and(5) NPK plus straw(NPKS). After 19 yr of treatments, the SOC stock increased 16.7, 44.2, 69.9, and 25.2% under the NPK, NPKM, 1.5NPKM, and NPKS, respectively, compared to the initial value. Among various nutrient factors affecting contribution percentage of BSP to winter wheat and summer maize, SOC was a major affecting factor for BSP in the fluvo-aquic soil. There were significant positive correlations between SOC stock and yields by BSP of winter wheat and summer maize(P〈0.01), and yields by BSP of winter wheat and summer maize increased 154 and 132 kg ha^(–1) when SOC stock increased 1 t C ha^(–1). Thus, increased SOC accumulation is a crucial way for increasing BSP in fluvo-aquic soil. The manure or straw combined application with chemical fertilizers significantly enhanced BSP compared to the application of chemical fertilizers alone. 展开更多
关键词 soil organic carbon basic soil productivity long-term fertilization DSSAT model fluvo-aquic soil wheat-maize rotation
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Optimal nitrogen fertilization of boreal conifer forest 被引量:1
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作者 Timo Pukkala 《Forest Ecosystems》 SCIE CSCD 2017年第2期123-132,共10页
Background: Forest fertilization offers a means to increase the production of renewable resources.Nitrogen is the most common fertilizer in boreal upland forests.There is plenty of research on the effect of nitrogen ... Background: Forest fertilization offers a means to increase the production of renewable resources.Nitrogen is the most common fertilizer in boreal upland forests.There is plenty of research on the effect of nitrogen fertilization on volume growth, but less research on the optimal timing of fertilization and optimal management of fertilized stands.Methods: This study used simulation and optimization to analyze the profitability of fertilization, optimal management of fertilized stands and the effects of fertilization on cash flows and timber yields.The management of 100 stands representing the most common growing sites of Scots pine and Norway spruce was optimized.Results: Fertilization improved profitability in most of the analyzed stands.Profitability improved most in spruce stands growing on mesic site.Improving stem quality increased the economic benefit of fertilization.The timber yields of medium-aged conifer stands can be increased by almost 1 m^3·ha^(-1)·a^(-1)(15%) in sub-xeric pine and mesic spruce sites and about 0.5 m^3·ha^(-1)·a^(-1)(5%) in mesic pine and herb-rich spruce sites when the recommended nitrogen dose(150kg·ha^(-1)) is applied once in 30 years.Conclusions: Nitrogen fertilization of boreal conifer forest should be used mainly in spruce-dominated stands growing on medium sites.The gains are the highest in stands where the mean tree diameter is 16–20 cm and stand basal area is 14–20 m^2·ha^(-1). 展开更多
关键词 Forest fertilization Optimal management Response model
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Effects of Nitrogen Application Rate and Seeding Density on Plant Growth and Seed Yield of Direct-seeding Rape
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作者 Tengfang LAN Youyuan WANG +3 位作者 Mingxiang ZHU Lu XIONG Yin HAN Shuo XIAO 《Agricultural Biotechnology》 CAS 2018年第4期153-156,共4页
[Objectives] This study was conducted to explore the effects of different N application rates and densities on the growth and development of direct-seeding rape as well as on its yield.[Methods] A field experiment was... [Objectives] This study was conducted to explore the effects of different N application rates and densities on the growth and development of direct-seeding rape as well as on its yield.[Methods] A field experiment was carried out by setting five N fertilizer treatments and three density levels.[Results] Increasing seeding density and N application rate could improve the seed yield of rape. The suitable N application rate for the three densities were calculated using the fitted fertilizer efficiency models, respectively, to be 186.77, 221.35 and 236.14 kg/hm^2, at which the yields were the highest. The results showed that in this area, the seeding density of direct-seeding rape could be selected in the range of 6.0×10^5-7.5×10^5 plants/hm^2, and the suitable N application rate could be in the range of 221.35-236.14 kg/hm^2.[Conclusions] This study provides a theoretical basis for the maximization of spatial resource and efficient utilization of fertilizer. 展开更多
关键词 N application rate Seeding density Direct-seeding rape Fertilizer response model
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Evaluation of a model recommended for N fertilizer application in irrigated rice
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作者 ZHENG Zhiming, YAN Lijiao, and WANG Zhaoqian, Agro-ecology Inst, ZheJiang Agri Univ, Hangzhou 310029, China 《Chinese Rice Research Newsletter》 1997年第3期7-8,共2页
The response of rice to N fertilizer applicationhas shown that high rates of N application donot always ensure a proportional increase inyield due to high N losses. A model, ORYZA-0 was developed by ten Berge for desi... The response of rice to N fertilizer applicationhas shown that high rates of N application donot always ensure a proportional increase inyield due to high N losses. A model, ORYZA-0 was developed by ten Berge for designingoptimum N fertilizer management strategy inrice. We evaluated the performance ofORYZA-0 in Jinhua, Zhejiang Province. ORYZA-0 includes N uptakes, partition-ing of N among the organs, and utilization ofleaf N in converting solar energy to dry mat-ter. It can predict the amount and time of Nfertilizer application to achieve a maximumbiomass or yield combining with Price algo-rithm optimization procedure. 展开更多
关键词 Evaluation of a model recommended for N fertilizer application in irrigated rice
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The Modelling of Parity Transition Patterns
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作者 GONG Yue,\ YANG Hua\|min,\ JIANG Hui\|lin Department of Computer Science Changchun Institute of Optics and Fine Mechanics, Changchun 130022, China 《Systems Science and Systems Engineering》 CSCD 1999年第4期13-20,共8页
This paper presents an application of the models of women childbearing staging process to show how those models are used in fertility analysis. We set up the models of women childbearing staging process based on parit... This paper presents an application of the models of women childbearing staging process to show how those models are used in fertility analysis. We set up the models of women childbearing staging process based on parity\|age specific intensities so that the models are both age dependency and parity dependency. The purpose of the work is to provide a practical example for using the model of parity transition probability. With the Netherlands period fertility data 1988—1992, a detail discussion of parity transition patterns of the Netherlands 1988—1992 is given. 展开更多
关键词 fertility modelling staging process parity transition
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The Models of Childbearing System
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作者 GONG Yue YANG Huamin JIANG Huilin(Changchun Institute of Optics and Fine Mechanics, Changchun, 130022 P. R. China) 《Systems Science and Systems Engineering》 CSCD 1998年第4期417-424,共8页
The purpose of this paper is to present the models of human reproduction process.A woman childbearing process is considered as a staging process associated with parity-age specificintensities. The models of age-specif... The purpose of this paper is to present the models of human reproduction process.A woman childbearing process is considered as a staging process associated with parity-age specificintensities. The models of age-specific birth probability, parity distributions and parity transitionprobability are obtained. In the testing of the models, we check those models with Netherlands perioddata, and the results display fairly fitting effects. 展开更多
关键词 staging process fertility modelling CONVOLUTION
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