冀中北小麦品种抗旱性筛选研究

干旱是华北地区小麦生产的重要限制因素,从推广小麦品种中鉴定和筛选抗旱品种,对稳定小麦产量、降低区域水分消耗具有重要意义.本研究以近年来在河北省中北部审定、推广的13个小麦品种为材料,设置冬后浇2水(D2处理)、浇1水(D1处理)和不浇水(D0处理)3种处理方式,进行了大田条件下的抗旱品种筛选试验.结果表明,在D0处理时...

Screening for Drought-Resistant Wheat Varieties in Northern Central Area of Hebei Province

Drought is one of the major limiting factors that affect the wheat yield production in north China.Identification of drought-resistant accessions from newly released wheat varieties is of great importance,in order to ensure stability of wheat production in this area.The present study attempted to screen droughtresistant varieties from 13 wheat varieties in central and north area of Hebei province under field conditions with different water regimes.If compared to normal watering regime,several agronomical traits including plant height,thousand kernel weight,kernels per spike,spikes per Mu,grain yield,chlorophyll content and leaf water loss rate in vitro of wheat decreased significantly with variation under limited water regimes.A slight difference on the resistance level of the varieties was observed using three indexes consisting of drought resistance index(DI),weighed drought resistance index(WDI)and drought-resistance comprehensive evaluation value(D)respectively,while two varieties were qualified showing drought-resistant.Three water-saving varieties have been identified by evaluating with water-saving index.Among the agronomic and physiological traits tested,the chlorophyll content,spikelet per spike,plant height,water loss rate of cutting leaves,flag leaf length and kernels per spike were found to be associated with drought resistance,and the chlorophyll content and spikelet per spike might serve as indicators simplifying the drought evaluation process.