1) grain yield per hectare
粮食单产
1.
Taking 40 prefectural cities as assessment unit and using mathematical statistics indicators and geography information system,the paper presents comprehensive analysis on regional variations of grain yield of per hectare in northeast China in 2004,with three viewpoints of grain yield per hectare,annual growth rate from 1997 to 2004 and main crops yield per hectare.
以东北地区40个地市(盟)为主要评价单元,从粮食单产水平、粮食单产增长率、主要作物单产水平3个角度,运用数理统计、GIS分析等多种方法,全面分析了2004年东北地区粮食单产的区域差异。
2.
Northeast China is a commodity grain base with strategic role in China,so researches on the change of grain yield per hectare in northeast China is of significance for ensuring China s grain security.
东北地区是我国具有战略意义的商品粮基地,粮食单产变化的研究对确保我国粮食安全具有重要意义。
3.
In this paper, the connotations of the risk of grain yield per hectare are explored and a new method is proposed to measure the risk of grain yield per hectare in Fujian province.
探讨了粮食单产风险的涵义,给出了测度粮食单产风险的方法,并用马尔科夫预测法建立了福建粮食单产风险的预警系统,得出了未来年份福建粮食单产风险的警度。
2) grain yield per unit area
粮食单产
1.
Change of drought condition in different economic regions and its relationship with fluctuation of grain yield per unit area;
不同经济地带旱灾灾情变化及其与粮食单产波动的关系
2.
Grain yield per unit area increased continually during the past near 50 years in HuangHuai -hai plain,and its increasing speed in recent years still kept higher than the average of all the country.
建国以来黄淮海平原粮食单产持续增长，近年来仍然高于全国同期单产增速。
3.
The variation trend of grain yield per unit area was studied with Yield channel in Liaoning province from 1949 to 2005,and the chemical fertilizer application and variation of fertilizer application structure from 1980 to 2005 were also studied.
以辽宁省1949~2005年粮食单产为原始数据,引入产量通道概念分析了辽宁省粮食单产变化趋势,同时分析了1980~2005年辽宁省农用化肥施用量和施用结构的变化。
3) Grain yield
粮食单产
1.
The article analyses China s grain comprehensive production capacity by using data of China s grain production from 1983 to 2005 and selecting the two major indicators of grain acreage and grain yield.
文章运用1983～2005年我国粮食生产的有关数据,选取粮食播种面积和粮食单产这两个最主要的指标对我国粮食综合生产能力进行分析,认为我国粮食生产仍处于规模收益递增阶段,单产是影响我国粮食综合生产能力最主要的因素,其次是粮食播种面积,农业的抗灾能力对粮食生产的影响不显著。
4) the per unit area yield of grain
耕地粮食单产
5) grain production
粮食生产
1.
Estimation of economic value of agricultural water resource in grain production in Huang-Huai-Hai Region;
黄淮海地区粮食生产中的农业水资源经济价值核算
2.
Responses of grain production to price and non-price factors in China;
我国粮食生产对价格及非价格因素的反应
3.
Practices and perspective of grain production in the middle of The Loess Plateau region;
黄土高原中部丘陵区粮食生产的实践与认识——以延安市宝塔区燕沟流域为例
6) crop production
粮食生产
1.
Greenhouse gases emission and crop production;
温室气体排放与中国粮食生产
2.
the prediction precision was high and thereby the Gray Model could play a good role in crop production of Dingxi county.
根据灰色预测分析区域粮食生产的发展趋势,对粮食安全具有积极意义。
3.
The impact of drought based on the data set of crop yield and rainfall in South China from 1966 to 1995,and flood disasters on crop production in South China was evaluated by the method of fuzzy set theory.
根据华南地区 196 6～ 1995年的粮食气象单产和降水量资料 ,利用模糊数学方法评价了华南地区旱涝灾害对粮食生产的影响并计算了减产率 。
补充资料：单产
1.单位面积产量的简称。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条