皖豆20配套栽培技术研究

Studies on the cultural technique for Wandou 20

通过试验 ,明确了皖豆 2 0的适宜播期为麦收后至 6月 15日 ,最迟不能晚于 7月 10日。皖豆 2 0分枝潜力大 ,自我调节能力强 ,适宜密度为 15～ 30万株 /hm2 ,最佳为 2 2 .5～ 30万株 /hm2 ,产量峰值在 2 6 .3万株 /hm2 。适宜播量为 75～ 10 5kg/hm2 ,最佳播量 75kg/hm2 。百克土中含P2 O52mg以上时 ,可不施P肥 ,富K的黄泛淤土无需施用K肥 ,上茬小麦每公顷产量在 6 0 0 0kg以上的田块 ,施N肥不增产。水分是影响该品种产量的重要因素 。

The results from experiment in two years showed that the suitable sowing date for Wandou 20 was June 15, no later than July 10. The soybean, with powerful ability of self-adjustting and enough potential in node generation, it's rightful plant density was 225～300 thousand plants per hm 2. When the density was 263 thousand per hm 2, the highest yield would appear unless bad weather or deterioration of other corresponding factors. So, 75kilogram seeds was suitable to sow in the area of 10 000m 2. Fertilizer application was not effective if more than 2mg P 2O 5 and abound K are contained in every 100g soil. And if the crop is planted after wheat's harvest, also the wheat's yield is more than 6 000kg/10 000m 2, N application was not effective, either. Water was a key factor to affect yield, with too much or too less water, there was no doubt that the yield would decrease