近年来,通过对浙麦1号的高产试验证明,从中产到高产必须适当减少单位面积上的穗数,在稳定一定穗数的基础上,增加每穗粒数、提高粒重而夺取高产.为了探讨提高小麦粒重的途径,我们于1981年选用浙麦2号为试材,通过不同播种期、播种量和施肥水平对小麦灌浆生理进行了研究. In recent years, through the high-yielding experiment on Zhejiang and maize No.1, it has been proved that the number of panicles per unit area must be appropriately reduced from middle class to high-yielding. On the basis of stabilizing a certain number of spikes, the number of grains per panicle should be increased and the grain weight should be increased to seize high yield. In order to explore the ways to improve the grain weight of wheat, we used Zhemai 2 as experimental material in 1981, and studied the grain filling physiology of wheat by different sowing dates, seeding rates and fertilization levels.