摘要
利用半干旱区自然降水少的特点,采用田间直接鉴定法,在正常供水、干旱胁迫2种条件下,对不同类型玉米品种进行了抗旱性和丰产性研究,结果表明,在拔节前至大喇叭口期严重缺水124.4mm,干旱胁迫强度达0.20的情况下,密植型玉米品种总体上比稀植型品种表现出更好的抗旱性和丰产性。密植型品种抗旱指数平均达0.92,稀植型品种抗旱指数平均达0.74;正常供水条件下,密植型品种平均产量达11047kg/hm2,稀植型品种平均产量为9503kg/hm2。密植型品种抗旱和丰产的主要原因是在正常供水、干旱胁迫2种条件下,能形成较多的穗粒数。
Using the characteristic of small natural precipitation in semiarid area, and the method of direct identification in field, it studied the drought-resistant and high yeild between the different kinds of maize varieties under the irrigation and drought conditions. The results showed that when the deficiency water was 124.4 mm and the intensity of drought-stress was 0.20 from the elongation stage to the large bell stage, the drought-resistant and high-yeilding of the maize which were close-planting varieties were generally better than the maize which were sparse-planting varieties. The average DI of the close-planting varieties was 0.92, and the sparse-planting varieties 0.74; and under the condition of normal water supply, the average yeild of the close-planting va- rieties was 11 047 kg/hm2, and the sparse-planting varieties 9 503 kg/hm2. The main reason of drought-resistant and high-yeilding of the close-planting varieties was that it could grown more kernels per ear under the irrigation and drought conditions.
出处
《山西农业科学》
2010年第5期10-12,86,共4页
Journal of Shanxi Agricultural Sciences
基金
国家"十一五"科技支撑计划项目(2006BAD29B04)
山西省科技攻关项目(2006031040-1)
关键词
玉米
密植型
稀植型
抗旱性
丰产性
Maize
Close-planting varieties
Sparse-planting varieties
Drought-resistantance
High-yeilding
