玉米品种抗旱性鉴定方法与指标研究

Appraisal Method and Indexes of Drought Resistance in Maize

在自然生态条件下,利用湖南及我国西南主推的10个玉米杂交种进行抗旱性鉴定方法与指标研究。结果表明:干旱对玉米产量及主要农艺性状有显著影响;通过产量及产量抗旱系数相关分析筛选出产量、抽雄至吐丝间隔、根深、株高和千粒重等5个指标可作为玉米抗旱性鉴定的良好参数;本文提出了综合隶属度值评价玉米抗旱性的方法,该方法鉴定抗旱强的品种是富友9号、洛玉1号、临奥1号、科玉2号、农大108,抗旱中等的为渝单7号、联合3号,抗旱性较差的有东单57、科玉1号、东单16,综合隶属度值评价结果与品种多年生产上抗旱性表现结果相一致。

In natural condition, this paper studied the drought resistance of 10 main maizes varieties in Hunan and Southwest of China. The results indicated that the drought had a significant influence on yield and main agronomic characters of maize. According to the analysis of drought-resistant coefficient of yield, ASI, root depth, plant height and 1000-kernal weight were selected to be used as parameters and indexes to appraise efficiently the drought resistance of maize and a method for evaluating the corn variety drought-resistance by using the five physiological parameters＇ average value of membership was proposed. The results indicated that the varieties with higher drought resistance is Fuyou9, Luoyu 1, Lin＇ ao 1, Keyu2, Nongdal08; the varieties with medium drought resistance is Yudan7, Lianhe3 and the varieties with lower drought resistance is Dongdan57, Keyul, Dongdanl6. The result comply with the drought resistance performance of the maizes varieties for many years.