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利用四元二次回归旋转组合设计方法,在秋播条件下研究苦荞黔苦3号籽粒产量与播种量及氮、磷、钾肥施用量之间的关系。通过试验,建立了籽粒产量与播种量、氮、磷、钾肥施用量的回归数学模型;经计算机模拟试验和优化选择,提出了秋播苦荞黔苦3号籽粒产量≥2 500kg/hm2的综合农艺措施为:播种量33.41~41.76 kg/hm2、施N量39.60~53.01 kg/hm2、施P2O5量175.50~214.50 kg/hm2、施K2O量57.96~68.72 kg/hm2。
The quaternary quadratic regressive rotation combination design method was used to study the relationship between grain yield and sowing rate and the application rates of nitrogen, phosphorus and potassium in tartary buckwheat Guizhou 3 under the conditions of autumn sowing. Through the experiment, the regression mathematic model of grain yield and sowing rate, nitrogen, phosphorus and potassium fertilizer application rate was established. According to the computer simulation test and optimization selection, the grain yield of acreage of tartary buckwheat Guizhou-Guizhou 3 was more than 2500kg / hm 2 The agronomic measures were as follows: sowing rate 33.41 ~ 41.76 kg / hm2, applying N rate 39.60 ~ 53.01 kg / hm2, applying P2O5 175.50 ~ 214.50 kg / hm2 and applying K2O 57.96 ~ 68.72 kg / hm2.