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。
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.
出处
《华北农学报》
CSCD
北大核心
1995年第1期45-50,共6页
Acta Agriculturae Boreali-Sinica
关键词
玉米
杂种
抗旱力
干旱系数
经济学产量
Maize hybrid
Drought-resistance
Drought coefficient
Water use efficiency for economic yield
