摘要： 本研究以我国玉米当前有代表性的10个推广种为材料，在半干旱地区设立田间水源控制设施，分不浇水区（旱区）与浇水区（水区）分析玉米杂交种的产量及产量因素的干旱系数、经济学产量的水分利用率和所需积温。测定玉米杂交种的抗旱力试验所获得的主要结果如下：（1）不同玉米杂交种对干旱的反应不尽相同，试材可分为不敏感组与敏感组两组。不敏感组以遗长101号、掖单4号、农大60号为代表，产量干旱系数分别为2.3%、8.7%和14.5%;敏感组以中单120号、京单841号为代表，干旱系数分别为20.7%和25.4%.（2）不同玉米杂交种经济学产量的水分利用率（籽粒kg/t水）差异较大，不敏感组水分利用率较之敏感组提高29.5%~58.3%.（3）从总体上来看，推荐玉米生产上扩大种植抗（耐）旱玉米杂交种遗长101号、掖单4号、农大60号。

关键词: 玉米, 杂交种, 抗旱力, 干旱系数, 经济学产量, 水分利用率

Abstract: Ten of current spread hybrids of maize in China were used as experimental materials.The drought coefficient for yield and yield components, water use efficiency for economic yield and accumulate temperature were analysed by using control equipment of water resources in field.The results obtained from the detection of the drought-resistance were as follows.1. The responses of the different maize hybrids to drought were difference. According to the observations, the experimental materials can be divide into two groups, i. e. non-sensitive group and sensitive group to drought. The representative cultivars of non-sensitive group are Yichang 101, Yedan 4 and Nongda 60. Their drought coefficients of yield are 2. 3%, 8. 7% and 14. 5%,respectively. The representative cultivars of sensitive group are Zhongdan 120 and Jingdan 841.Their drought coefficients of yield are 20. 7% and 25. 4 %, respectively.2. The water use efficiency for economic yield of the maize hybrids (grain kg/t water) has a greater difference from each other. The water use efficiency of the non-sensitive group is 29. 5-58. 3% higher than that of the sensitive group. 3. In summary, the drought-resistant hybrids of maize are recommended to extend planting areas. These maize hybrids are Yichang 101, Yedan 4 and Nongda 60.

Key words: Maize hybrid, Drought-resistance, Drought coefficient, Water use efficiency for economic yield

中图分类号: 

• S513.01