宁夏灌区几个夏大豆品种生长发育及产量形成规律的研究

STUDIES ON THE LAW OF GROWTH AND FORMING OF YIELD OF SEVERAL VARIETIES OF SUMMER SOYBEAN IN NINGXIA IRRIGATION AREA

本文根据试验资料所得数据，以春夏大豆代表品种为对比，对几个夏大豆品种生长发育及产量形成规律作了系统研究分析，为宁夏灌区发展夏大豆生产提供了科学理论依据。指出虽然更大豆较春大豆全生育期短，植株矮，分枝少而小，单株生产力低，但夏作物收获后，早播种，合理密植，早管早促，经济系数仍然较高。其经济产量高于间、套种的春大豆，同时提高了复种指数，改善了种植茬口，是宁夏粮豆生产的好方式。

The paper according to the material and datum that were gotten by experiment,compared with some representative varieties of Spring and Summer soybean,systematically studied and analysed the law of growth and forming of yield of several varieties of Summet soybean in Ningxia,provided a scientifical theoratical basis for developing production of Summer soybean in Ningxia irrigation area,and pointed out,although the growing period is shorter,the height of plant is lower,the branch is fewer and smaller,the yield of single plant is lower than of Spring soybean,but after harvesting Summer crops,at the condition of premature sowing, proper close planting,promoting growth,the economic yield of Summer soybean is still higher than the yield of Spring soybean at the condition of interplanting. In the same way, it increased the multiple crop index,improved planting crops for rotation. This is a good way of production of grains and beaus in Ningxia,that can be popularized.