农作物综合抗旱性评价方法的研究

Comparison of Evaluating Methods for Agronomic Drought Resistance in Crops

从统计模型和应用两方面对抗旱系数、干旱伤害指数、干旱敏感指数及优势值等作了比较研究。结果表明：①干旱伤害指数和敏感指数较之抗旱系数只加了一个常数或除以一个常数，由３个公式计算出的３个变量系列其相关系数皆为１，抗旱系数是一个典型的表达式；②Ｌｉｎ的优势值将基因型值和基因型与环境的互作结合在一起，在理论上是比较完备的，但在本试验中计算结果与实际排序不甚符合；③抗旱指数将旱地产量与抗旱系数结合在一起，几年来抗旱指数ＤＩ已得到北方一些院校的采纳。

Five evaluating methods of agronomic drought resitance in wheat were investigated to examine the effect of the evaluation.The results indicate that drought susceptibility ( S )and relative yield decrease index increase a constant as compared with drought resistance coefficient. (S),(1-Y d/Y p),(Y d/Y P) are correlative completely. The superiority measure( P )may be regarded as the MS of the joint effect of G and GE.but its suitability for evaluating drought resistance needs further experiment.Drought resistance index DI=Y d/Y P×Y d/Y md were accepted by agronomic researchers of several provinces.