The Concept and Statistical Method of Drought Resistance Index in Crops

doi:10.3321/j.issn:1000-7091.1990.02.004

Abstract

Abstract: Stress susceptibility index (1-Yd/Yp)/(1-∑Yd/∑Yp) used to determine drought resistance on the field is the alter form of drought resistance coefficient(Yd/Yp).The correlative coefficient above both is r=-1.Therefore，the former doesn't improve the defect of the latter.Using thirty winter wheat varieties as trial materials，after two years experim ents，the concept of drought resistance index in crops was put for ward，its expressing equation is:the yield in dryland x drought resistance coefficient/average yiell in dryland，it makes the drought resistance coefficient (physical index) correlate well with the yield in dryland (agronomy index) and is suited for breeder.

Key words: Crop, Drought resistance index, Cluster analysis

Lan Jusheng, Hu Fushun, Zhang Jingrui. The Concept and Statistical Method of Drought Resistance Index in Crops[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1990, 5(2): 20-25. doi: 10.3321/j.issn:1000-7091.1990.02.004.

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