河北省10个主栽夏玉米品种的抗旱性评价

Evaluation of Drought Resistance of Ten Major Summer Maize Cultivars in Hebei Province

玉米是需水量大、对水分胁迫较为敏感的作物,干旱会影响玉米产量和品质,因此,筛选抗旱性强的玉米品种进行推广意义重大。选用河北省10个主栽夏玉米品种为试材,以正常灌溉为对照,分析了干旱胁迫下玉米生育期、农艺性状、产量性状和产量的变化;并分别利用抗旱指数和隶属度,对参试玉米品种的田间抗旱性进行了评价。结果表明:郑单958、伟科702、衡单6272和登海605抗旱性较好,其次是先玉335、沧玉7s和沧玉76,沧玉6s、蠡玉86和浚单20抗旱性较差。

Maize is a kind of crop that needs much water,and is sensitive to water stress. Drought has a great effect on the yield and quality of maize. It is great significant to screen and promote drought tolerant maize varieties. Ten major summer maize cultivars in Hebei Province were identified for drought tolerance. The growth period,agronomic traits,yield components and yield were determined under drought condition and normal water condition respectively. The drought index and subordinate function values of different maize cultivars were calculated. The results showed that the drought tolerance of Zhengdan 958,Weike 702,Hengdan 6272 and Denghai605 was better, followed by Xianyu 335, Cangyu 7 s and Cangyu 76, and that of Cangyu 6 s, Liyu 86 and Xundan 20 was poor.