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美国北部种植的大豆,属无限结荚习性,南方种植的属有限结荚习性.“全季”品种(即充分利用生长季节的晚熟品种)产量最高.较早熟的品种,采用窄行距早播,并以稍高的密度,能得到相等或超过宽行距较晚熟品种的产量.选择品种着重考虑:①成熟期适合本地区;②高产潜力;③抗倒伏性;④抗病性.一般都愿选用“合格”种子,其标志之一是具有高度发芽率.发芽率的保持,除了精心贮藏保管外,注意收获时期的种子
Soybeans planted in the northern part of the United States are of an unlimited pod habit and have a limited pod habit of planting in the south.The yield of the “all-season” cultivar (that is, the late-maturing cultivar that makes full use of the growing season) has the highest yield.The earlier- And with a slightly higher density, can be equal to or more than the wide line spacing more late varieties yield.Select varieties to consider: ① maturity for the region; ② high yield potential; ③ lodging resistance; ④ disease resistance are generally willing to use One of the signs of “qualified” seeds is a high germination rate, which, apart from careful storage and storage, should be paid attention to the seeds at harvest