高蛋白大豆新品系濉科928高产栽培技术研究

High Yielding Practice for High-protein Soybean Line Suike 928

针对高蛋白大豆濉科928的生育特性，从播期、密度和施肥3个方面研究了其高产栽培技术。研究结果表明：濉科928大豆的产量与播期、密度、施肥量均呈二次曲线关东。高产栽培各因子的适宜值为：播期6月5日-23日，密度20．37～27．35×10^4/hm^2，基施NPK（15：15：15）三元复合肥233．84—359．18kg/hm^2，开花期追施尿素67．16-110．09kg/hm^2。在基础地力产量2060kg/hm^2的田块上，6月14日播种，基施NPK（15：15：15）三元复合肥281．81kg/hm^2，初花期追施尿素81．61kg/hm^2，产量可达2814．35kg／hm^2。对应的产量结构为：株数22．5×104／hm^2，单株荚数46．81个，荚粒数1．76粒，百粒重17．15g。

High yielding practice for high protein soybean line Suike 928 was investigated form the aspects of sowing date, density and fertilization. Quadric curve was found between the sowing date, density, fertilizer application and soybean yield. The optimal seeding date and planting density were 5 June to 23 June, 20370 ～ 27350 plants/hm^2. Base application of N, P2O5, and K2O level was 35.08 ～ 53.88 kg/hm^2 35.08 ～ 53.88 kg/hm^2 and 35.08 ～ 53.88 kg/hm^2 respectively. Top dressing N 32 ～ 52 kg/hm^2 applied at the flowering stage. In the field with average yield of 2060 kg/hm^2, while sown on June 14 with 281.81 kghm^-2of N- P- K （15 - 15 - 15） and top dressing N 12.24 kg/hm^2 at the early flowering stage, 2814.4 kg/hm^2 yield was obtained.