黑膜全膜双垄栽培陇薯10号原种产量与氮磷施用量及密度的关系研究

Study on Relationship Among Potato Yield and N、P Fertilizer and Density of Double Ridge Cultivation Mulched With Black Plastic Film

为了研究半干旱地区黑膜全膜覆盖双垄栽陪下氮肥施用量（X1）、磷肥施用量（X2）和播种密度（X3）对陇薯10号原种产量（Y）的影响,通过试验建立了回归方程：Y=48.47-2.92X12 -2.65X3^2 -3.91X2X3,对方程的分析表明,陇薯10号原种目标产量大于30 t/hm^2的栽培方案是：施N129.79170.27 kg/hm^2、P2O5 117.10-152.90 kg∕hm^2,播种密度为49 583耀55 417株/hm^2.

Mathematic model during the application nitrogen (X1),phosphorus (X2),planting density (X3)and the yeild of Longshu 10 (Y)had been built by the quadratic general rotational combination design. Y=48.47-2.92X12 -2.65X32 -3.91X2X3. The advanced analysis result shows that the yield is more than 30 t/hm2 is pure N 129.79~170.27 kg/hm2,P2O5 117.10~152.90 kg/hm2, 49 583~55 417 plant/hm2(row spacing 60 cm,plant spacing during 230.09~33.63 cm).