以小麦生长受抑制的天数为指标的排水标准试验研究

在对以作物生长受抑制天数为指标的排水标准的试验研究基础上，分析了上海青浦农田水利试验站农田地下排水试验资料，对小麦相对产量与累积超标水位（ＳＥＷ３０或ＳＥＷ５０）关系，各生育阶段受渍敏感因子，以及抑制天数指标与相对产量关系等进行了探讨。研究表明，小麦的相对产量与生长中、后期（３～５月）的ＳＥＷ３０和ＳＥＷ５０，以及ＳＤＩ均有良好的线性关系。试验表明，作物各生长阶段敏感因子有显著不同，即使在同一生长阶段，由于受渍条件不同或抑制天数因子不同，敏感因子也有一定差异

A Study of the Drainage Criteria of Relationship between the Relative Yield of Winter Wheat and Stress Day Index

The paper discusses the response of relative crop yield to the stress of excessive water indexes SEW 30 and SEW 50 for the later stages and the whole growth period of winter wheat and the stress day index SDI,as well as the susceptibility factor of crops at different stages CS,based on experiments carried out in the suburban areas of shanghai. The study shows that the linear relationship holds between the relative yield of winter wheat and the SEW 30 and SEW 50 for the later stages,as well as the SDI indexes.The susceptibility factors of crops for a specified stage obtained from experiments with different stress conditions and SEW values are different.