摘要
夏谷是华北地区近几年发展较快的粮食作物。夏谷生育期间光、热、水等自然资源十分丰富,例如山西省太谷县(1958—1978年统计)7至9月份降水量占全年降水量的50.3%,≧10℃积温占全年52%,日照时数占全年25.8%。前茬作物(冬小麦、冬油菜等)收获后复播谷子,两茬利用当地自然资源全年可达95%以上。近几年的生产实践证明,发展夏谷是旱地农业种植制度经济有效地利用自然资源,提高粮食总产量,促进农牧结合的一条有效途径。
The variety"Fujincao"grown in the summer millet regions of Shanxi Province possesses medium plant height and ear length,but is tillerless.According to the study,in order to obtain optimum yield,the planting density should be 50,000-60,000 seedlings per mu or aboat 4,000 grains per ear,the 1,000 grain weight should be 3g,and the empty grain ratio should not be more than 11%.The leaf area index should be from 1.4 to 1.5 in the jointing stage,5-5.5 in the booting stage,6 in the heading stage,5 in the milking stage,and 3 in the maturity stage.The total photosynthesis potential should be 200-210 thousands M^(2)/day.The net assimilation rate in the whole growth period should be 5 g or more,and the economic coeffecient should be about 0.50.The weight of dry matter per single plant should be 1g in the jointing stage,5g in the booting stage,9-10 g in the heading stage,10-11g in the milking stage,and about 20 g at maturity stage.
作者
杭世騄
王呈祥
Hang Shilu;Wang Chengxiang(Shanxi Agricultural University,Taiyuan,Shanxi Province)
出处
《中国农业科学》
1984年第6期14-20,共7页
Scientia Agricultura Sinica
