《Table 3 Criteria for assessment of yield variation caused by climate change》

《Table 3 Criteria for assessment of yield variation caused by climate change》   提示:宽带有限、当前游客访问压缩模式
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《Effect of Climate Change on Yield of Winter Wheat in Jiangsu Province》


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Evaluation model of Spike-grain structureSHANG et al.[26]deem that to assess the impact of meteorological conditions on production objects by the integrating regression method is better.Accordingly,let the evaluation object be Yi(t)(where in i is the spike-grain structure,and refers to the number of spikes,number of grains per spike and thousand-grain weight when i=1,2 and 3,respectively) ,and the meteorological element be Xjk(t)(wherein j is the meteorological factor,and refers to the active accumulated temperature(AAAT),accumulated precipitation(AP)and radiation(RAD)when j=1,2 and 3,respectively;and k is the assessment period,that is,different growth stages(see Table 2 for details),then: