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近年来,在大豆的生产上,有人采用了一种新的栽培方法,即把早熟品种与晚熟品种按一定比例混合播种(一般早熟品种占三分之一左右)。它的好处是:可以保持在较大的栽培密度下,保证植株正常生长,尤其是生长后期的生育,从而获得密植丰产。因为早熟品种由于早熟,先行落叶,这样可以腾出一定空间,减少遮荫郁闭,为晚熟品种创造更好的采光、通风条件,促使生育良好,从而提高产量。东北吉林省一些地区实践表明,
In recent years, a new cultivation method has been adopted for the production of soybean, that is, the precocious varieties and late-maturing varieties are mixed and sown in a certain proportion (generally about one third of the varieties of early-maturing varieties). Its benefits are: to maintain a large planting density, to ensure the normal growth of plants, especially the growth of late growth, in order to obtain close planting yield. Because the precocious varieties are precocious and leaves deciduous first, this leaves room for shade, reduces shade and shade, creates better daylighting and ventilation for late-maturing varieties, and promotes fertility and thus increases yields. Some areas in Northeast Jilin Province show that,