黔苦2号苦荞新品种春播高产综合农艺措施研究

运用二次回归正交旋转组合设计，在春播条件下研究黔苦2号苦荞籽粒产量与其播种量及N、P、K肥施用量间的关系。通过试验，建立了黔苦2号籽粒产量与主要农艺措施的数学模型，通过对模型的解析和模拟寻优分析。结果表明：黔苦2号籽粒产量高于2800kg/hm2的优化栽培技术方案：播种量67.14~74.93 kg/hm2，施N量28.88~40.12 kg/hm²，施P₂O₅量179.11~210.89 kg/hm²，施K₂O量43.94~61.06 kg/hm²；试验4因子对籽粒产量影响的程度大小为播种量>施K2O量>施P₂O₅量>施N量。

Study on High-yield Integrated Agronomic Measures of Qian-bitter-buckwheat 2 Planted in Spring

Using quadratic regression universal rotary combination design, we studied relations between grain yield of Qian-bitter-buckwheat 2 which was planted in spring and four main agronomic measures（seeding rate, N-application rate , P2O5-application rate and K2O-application rate）.Mathematics model was set up by experiment．By simulating the model and simulation-optimization analysis，we put forward cultivation techniques programme（buckwheat grain yield≥2800kg/hm²）: seeding rate is 67.14~74.39 kg/hm², N-application rate is 28.88~40.12kg/hm2, P₂O₅-application rate is 179.11~210.89kg/hm², K2O-application rate is 43.94~61.06 kg/hm². The results showed that the effect on grain yield is：seeding rate＞K₂O-application rate＞P₂O₅-application rate＞N-application rate.