高海拔冷凉地区引种大豆栽培技术研究

7个试验结果表明，在西宁高海拔冷凉生态条件下，引种北方春大豆超早熟和极早熟品种（品系）可获成功。适宜播种期在4月底至5月初。适宜栽培密度为45万株／hm2。播种时用45～75kg／hm2尿素和450kg／hm2过磷酸钙做种肥，始花后分2～3次追施105～150kg／hm2尿素，开花期至鼓粒期进行2～3次灌水，可获1500kg／hm2以上产量，最高产量达2283kg／hm2。

CULTURE MEASURES OF SOYBEAN IN HIGH ALTITUDE AND COLD REGION

7 years experiment results indicated that it was successful in introducing super-early maturity of north spring soybean to the high altitude and cold ecological region in Xining. The suitable sowing time of this soybean varieties was from the end of April to the begining of May and the appropriate density was about 450 .000 plants/hm2. Before sowing,45-75kg/hm2 urea and 450kg/hm2 superphosphate should be applied, and 105~150kg/hm2 urea also should be sparated into 2-3 times after inflorescence. From inflorescence until pod filling stage, 2-3 times irrigation should be done. As the result the yield maight achieve over 1500kg/hm2 and the highest yield could reach 2283kg/hm2.