限制大豆高产的主要因素有光照和积温，合理早播种、早出苗可增加光照和积温，有利于提高大豆产量，因此确定大豆本地最佳播种期对大豆产量影响很大。创业农场1996年以前要求大豆在5月25日前播种结束，但因播种面积过大（近1万hm2）及自然条件影响，仍有部分地号在6月播种，平 The main factors restricting soybean high yield are light and accumulated temperature, reasonable early sowing, early emergence can increase the light and accumulated temperature, is conducive to increasing soybean yield, so determine the soybean local sowing period on soybean yield a great impact. Prior to 1996, the start-up farms demanded soybean to be planted by May 25, but due to the oversized planting area (nearly 10,000 hm2) and the natural conditions, there are still some areas planted in June.