Based on the surveys and the statistic data during 1980-2003, the variation character of grain yield per unit area in Northeast China and its main factors have been discussed by the methods of statistics and grey corr...Based on the surveys and the statistic data during 1980-2003, the variation character of grain yield per unit area in Northeast China and its main factors have been discussed by the methods of statistics and grey correlation analysis. The results show that: 1) the grain yield per unit area has been taking on an increasing trend in the recent 20 years. It increased from 2519.80kg/ha in 1980 to 4216.11kg/ha in 2003, with an increasing rate of 67.32%; 2) the variation of grain yield per unit area is considerably prominent and its range is also very great, with the maximal increase rate of 42.59% and maximal decrease rate of 21.13%, respectively, which are far above the whole Chinese average level; 3) the variation of main crops' yield per unit area is remarkable, which takes on the character that the yield of corn is much higher than that of soybean and rice; and 4) the grey correlation analysis shows that the most important factors impacting the variation of grain yield per unit area are the total power of agricultural machinery, the consumption of chemical fertilizer and effective irrigated area. However, the influence of natural disaster and income level should not be ignored. Effective ways to improve grain yield per unit area are to construct farmland improvement groundwork, reclaim the middle- and low-yield farmland, etc.展开更多
Based on the data from the Cost-benefit Data of Farm Produce and the China Agricultural Yearbook, this paper aims to examine the spatial and temporal change characteristics of total grain production and its affecting ...Based on the data from the Cost-benefit Data of Farm Produce and the China Agricultural Yearbook, this paper aims to examine the spatial and temporal change characteristics of total grain production and its affecting factors. The results show that： 1） During 1980 to 2007, total grain production increased from 3.20 ~ 108 t to 5.02 x 108 t in China, with annual increasing rate of 1.68%. From the regional disparities, most of the regions present increasing trend of total grain production except for several regions with higher level of economic development; 2） Grain sown area decreased from 1.17 × 108 ha in 1980 to 1.06 x 108 ha in 2007, which has negative effect on total grain production; 3） The increase of grain yield per unit area caused by land use intensity changes contributed to the increase of total grain yield greatly. However, as the land use intensity showed that farmers pay more attention to labor-saving input but not yield-increasing input, the less enthusiasm of farmers in grain production may become an important constraint on fu- ture grain production increase in China; 4） Based on the results, this paper proposed different land management poli- cies in different regions, for example, the government should protect cultivated land, promote large scale production. As to the less developed regions, the government should pay more attention to agricultural subsidies to promote farm- ers＇ enthusiasm in grain production.展开更多
The spike-grain structure and yield data of winter wheat observed at 10 winter wheat observation stations in Jiangsu agrometeorological observation stations in the China Meteorological Observation Network were used to...The spike-grain structure and yield data of winter wheat observed at 10 winter wheat observation stations in Jiangsu agrometeorological observation stations in the China Meteorological Observation Network were used to design the assessment model and evaluation criteria of the effects of climate change on spikegrain structure and yield of winter wheat. The linear regression method was used to determine the parameters of the assessment model,and the climate fact extrapolation method was used to determine future climate change scenarios. The effects of climate change on spike-grain structure and yield of winter wheat in Jiangsu Province were calculated and analyzed finally. The results showed that with the climate change,the meteorological conditions during the growth and development of winter wheat changed,which caused the number of effective spikes to decrease,and the number of grains per spike and thousand-grain weight to increase,and this new type of spike-grain structure combination was beneficial to the increase of the unit yield of winter wheat. The variations of meteorological elements caused by climate change during winter wheat growth and development had different effects on spike-grain structure at different growth stages. The spike-grain structure had an "increasing-decreasing" periodic variation with the growth period overall,with a period of one to three stages. The relationship between winter wheat growth and development and meteorological conditions can be adjusted in real time through stress-resistant cultivation techniques to achieve the high-yield and high-quality cultivation target of winter wheat production.展开更多
The yield and yield components of Japonica variety Tongjing 981 under different density and fertilization levels were studied through regression and correlation and path analysis. The results showed that the number of...The yield and yield components of Japonica variety Tongjing 981 under different density and fertilization levels were studied through regression and correlation and path analysis. The results showed that the number of panicles per unit area, number of filled grains per panicle and 1 000-grain weight all had very significant yield increasing effects, and the number of panicles per unit area played a leading role. However, the yield increasing effects of the number of panicles per unit area and number of filled grains per panicle are equally important when the basic seedlings are more or the N fertilizer application rate is large. In practical production, a major factor should be determined among the yield components, and rational cultivation measures should be taken accordingly, to improve yield.展开更多
According to the data of the second national land survey,the farmland area of China at the end of 2009 was 200 million mu more than the original statistical data.This raises widespread concern.Analysis is carried out ...According to the data of the second national land survey,the farmland area of China at the end of 2009 was 200 million mu more than the original statistical data.This raises widespread concern.Analysis is carried out from the perspective of task,technique,necessities and effect on China's grain security of the second national land survey.Through analysis,it can be deemed that data of the second national land survey are reliable.It overcomes defects of traditional survey projects and will be of profound significance for grasping current situations of farmland resources in China.Farmers are grain production entities,while the grain yield survey of farmers is calculated through sampling survey of per unit area yield and the sown area.Therefore,the increase in farmland area may indicate underestimation of the grain yield,and the grain security risk of China will decline accordingly.展开更多
为明确不同品种(系)彩色小麦主要农艺性状的特征及其与籽粒产量的相关关系,筛选出适宜鲁东地区栽培的彩色小麦品种。于2020-2022年2个冬小麦生长季,选用4个紫色小麦品种(系)青研紫麦1号(QYZ-1)、QYZ-2、山农紫麦1号(SNZM1)和农大3753(ND...为明确不同品种(系)彩色小麦主要农艺性状的特征及其与籽粒产量的相关关系,筛选出适宜鲁东地区栽培的彩色小麦品种。于2020-2022年2个冬小麦生长季,选用4个紫色小麦品种(系)青研紫麦1号(QYZ-1)、QYZ-2、山农紫麦1号(SNZM1)和农大3753(ND3753),2个蓝色小麦品系20064和20072以及普通白粒小麦品种济麦22(JM22,对照品种)为试验材料,系统研究了不同品种(系)彩色小麦的旗叶SPAD值、叶面积指数、干物质积累与转运、产量及其构成因素等方面的差异,和各农艺性状的稳定性以及产量可持续性。结果表明,各彩色小麦品种产量、千粒质量、开花期叶面积指数、花后SPAD值、开花期干物质积累量、成熟期干物质积累量、花后干物质积累量及收获指数均低于普通白粒小麦品种济麦22。各彩色小麦品种(系)间比较,紫色小麦QYZ-1产量显著高于其他彩色小麦品种(系),单位面积粒数与QYZ-2无显著差异,但其千粒质量显著高于QYZ-2;紫色小麦QYZ-1开花期上三叶叶面积指数显著高于蓝色小麦品系及ND3753,紫色小麦QYZ-1花后旗叶SPAD、成熟期干物质积累量、花后干物质积累量、花前干物质转运量和收获指数均高于其余彩色小麦品种(系);与其他品种(系)比较,JM22和QYZ-1各农艺性状的变异系数(CV)均较小,彩色小麦间比较,QYZ-1的产量均值和产量可持续性指数(SYI)均较高。另外,相关分析表明,产量分别与开花期干物质积累量、成熟期干物质积累量、花后干物质积累量、花前干物质转运量、收获指数、旗叶花后28 d SPAD值、开花期全绿叶叶面积指数和千粒质量呈极显著的正相关关系。综合2 a的结果,表明QYZ-1具有适宜的叶面积指数,并维持了较高的花后旗叶SPAD值,花后旗叶的衰老较慢,开花-成熟时间较长,协同提高了花后干物质积累量和花前干物质转运量、成熟期干物质积累量和收获指数以及单位面积粒数和千粒质量,表现出较高的产量。综上所述,青研紫麦1号产量稳定且可持续性较好,是适宜鲁东地区栽培的彩色小麦品种。展开更多
基金Under the auspices of the National Natural Science Foundation of China (No. 40601027)
文摘Based on the surveys and the statistic data during 1980-2003, the variation character of grain yield per unit area in Northeast China and its main factors have been discussed by the methods of statistics and grey correlation analysis. The results show that: 1) the grain yield per unit area has been taking on an increasing trend in the recent 20 years. It increased from 2519.80kg/ha in 1980 to 4216.11kg/ha in 2003, with an increasing rate of 67.32%; 2) the variation of grain yield per unit area is considerably prominent and its range is also very great, with the maximal increase rate of 42.59% and maximal decrease rate of 21.13%, respectively, which are far above the whole Chinese average level; 3) the variation of main crops' yield per unit area is remarkable, which takes on the character that the yield of corn is much higher than that of soybean and rice; and 4) the grey correlation analysis shows that the most important factors impacting the variation of grain yield per unit area are the total power of agricultural machinery, the consumption of chemical fertilizer and effective irrigated area. However, the influence of natural disaster and income level should not be ignored. Effective ways to improve grain yield per unit area are to construct farmland improvement groundwork, reclaim the middle- and low-yield farmland, etc.
基金Under the auspices of National Natural Science Foundation of China (No. 40971062)China Postdoctoral ScienceFundation (No. 20100480441)
文摘Based on the data from the Cost-benefit Data of Farm Produce and the China Agricultural Yearbook, this paper aims to examine the spatial and temporal change characteristics of total grain production and its affecting factors. The results show that： 1） During 1980 to 2007, total grain production increased from 3.20 ~ 108 t to 5.02 x 108 t in China, with annual increasing rate of 1.68%. From the regional disparities, most of the regions present increasing trend of total grain production except for several regions with higher level of economic development; 2） Grain sown area decreased from 1.17 × 108 ha in 1980 to 1.06 x 108 ha in 2007, which has negative effect on total grain production; 3） The increase of grain yield per unit area caused by land use intensity changes contributed to the increase of total grain yield greatly. However, as the land use intensity showed that farmers pay more attention to labor-saving input but not yield-increasing input, the less enthusiasm of farmers in grain production may become an important constraint on fu- ture grain production increase in China; 4） Based on the results, this paper proposed different land management poli- cies in different regions, for example, the government should protect cultivated land, promote large scale production. As to the less developed regions, the government should pay more attention to agricultural subsidies to promote farm- ers＇ enthusiasm in grain production.
基金Supported by 2016 Key Business Project of Jiangsu Meteorological Bureau(20161122)
文摘The spike-grain structure and yield data of winter wheat observed at 10 winter wheat observation stations in Jiangsu agrometeorological observation stations in the China Meteorological Observation Network were used to design the assessment model and evaluation criteria of the effects of climate change on spikegrain structure and yield of winter wheat. The linear regression method was used to determine the parameters of the assessment model,and the climate fact extrapolation method was used to determine future climate change scenarios. The effects of climate change on spike-grain structure and yield of winter wheat in Jiangsu Province were calculated and analyzed finally. The results showed that with the climate change,the meteorological conditions during the growth and development of winter wheat changed,which caused the number of effective spikes to decrease,and the number of grains per spike and thousand-grain weight to increase,and this new type of spike-grain structure combination was beneficial to the increase of the unit yield of winter wheat. The variations of meteorological elements caused by climate change during winter wheat growth and development had different effects on spike-grain structure at different growth stages. The spike-grain structure had an "increasing-decreasing" periodic variation with the growth period overall,with a period of one to three stages. The relationship between winter wheat growth and development and meteorological conditions can be adjusted in real time through stress-resistant cultivation techniques to achieve the high-yield and high-quality cultivation target of winter wheat production.
基金Supported by National Spark Program(2013GA690123)Agricultural New Variety Postsubsidy Project of Major Research and Development Programof Jiangsu Province(BE2016398)~~
文摘The yield and yield components of Japonica variety Tongjing 981 under different density and fertilization levels were studied through regression and correlation and path analysis. The results showed that the number of panicles per unit area, number of filled grains per panicle and 1 000-grain weight all had very significant yield increasing effects, and the number of panicles per unit area played a leading role. However, the yield increasing effects of the number of panicles per unit area and number of filled grains per panicle are equally important when the basic seedlings are more or the N fertilizer application rate is large. In practical production, a major factor should be determined among the yield components, and rational cultivation measures should be taken accordingly, to improve yield.
文摘According to the data of the second national land survey,the farmland area of China at the end of 2009 was 200 million mu more than the original statistical data.This raises widespread concern.Analysis is carried out from the perspective of task,technique,necessities and effect on China's grain security of the second national land survey.Through analysis,it can be deemed that data of the second national land survey are reliable.It overcomes defects of traditional survey projects and will be of profound significance for grasping current situations of farmland resources in China.Farmers are grain production entities,while the grain yield survey of farmers is calculated through sampling survey of per unit area yield and the sown area.Therefore,the increase in farmland area may indicate underestimation of the grain yield,and the grain security risk of China will decline accordingly.
文摘为明确不同品种(系)彩色小麦主要农艺性状的特征及其与籽粒产量的相关关系,筛选出适宜鲁东地区栽培的彩色小麦品种。于2020-2022年2个冬小麦生长季,选用4个紫色小麦品种(系)青研紫麦1号(QYZ-1)、QYZ-2、山农紫麦1号(SNZM1)和农大3753(ND3753),2个蓝色小麦品系20064和20072以及普通白粒小麦品种济麦22(JM22,对照品种)为试验材料,系统研究了不同品种(系)彩色小麦的旗叶SPAD值、叶面积指数、干物质积累与转运、产量及其构成因素等方面的差异,和各农艺性状的稳定性以及产量可持续性。结果表明,各彩色小麦品种产量、千粒质量、开花期叶面积指数、花后SPAD值、开花期干物质积累量、成熟期干物质积累量、花后干物质积累量及收获指数均低于普通白粒小麦品种济麦22。各彩色小麦品种(系)间比较,紫色小麦QYZ-1产量显著高于其他彩色小麦品种(系),单位面积粒数与QYZ-2无显著差异,但其千粒质量显著高于QYZ-2;紫色小麦QYZ-1开花期上三叶叶面积指数显著高于蓝色小麦品系及ND3753,紫色小麦QYZ-1花后旗叶SPAD、成熟期干物质积累量、花后干物质积累量、花前干物质转运量和收获指数均高于其余彩色小麦品种(系);与其他品种(系)比较,JM22和QYZ-1各农艺性状的变异系数(CV)均较小,彩色小麦间比较,QYZ-1的产量均值和产量可持续性指数(SYI)均较高。另外,相关分析表明,产量分别与开花期干物质积累量、成熟期干物质积累量、花后干物质积累量、花前干物质转运量、收获指数、旗叶花后28 d SPAD值、开花期全绿叶叶面积指数和千粒质量呈极显著的正相关关系。综合2 a的结果,表明QYZ-1具有适宜的叶面积指数,并维持了较高的花后旗叶SPAD值,花后旗叶的衰老较慢,开花-成熟时间较长,协同提高了花后干物质积累量和花前干物质转运量、成熟期干物质积累量和收获指数以及单位面积粒数和千粒质量,表现出较高的产量。综上所述,青研紫麦1号产量稳定且可持续性较好,是适宜鲁东地区栽培的彩色小麦品种。
