磷钾肥对稻草覆盖免耕秋马铃薯产量及主要农艺性状的影响

Effects of Straw-covering and No-tillage Autumn Potato Different Quantity of the Potassium and Phosphorus Application on Yield and Main Agronomic traits

为了明确在四川盆地生态条件下,不同钾肥和磷肥施用量及品种对稻田覆盖秋马铃薯产量及主要农艺性状的影响,采用混合型正交表(L84×24)进行了正交试验,供试材料为米拉和川芋5号。结果表明:不同钾肥和磷肥水平间,均对块茎产量有显著差异,达0.01显著水平,对地上部干物重、株高、茎粗及根系干物重均无显著差异;不同品种间,对块茎产量无显著差异,但对地上部干物重、株高、茎粗及根系干物重有显著差异,达0.01显著水平;试验表明,在四川盆地生态条件下,稻田覆盖秋马铃薯栽培技术中,施钾肥315kg/hm2,磷肥270kg/hm2,米拉品种产量可达24015kg/hm2。

In order to understand effects of straw-covering and no-tillage autumn potato different quantity of the potassium and phosphorus application and varieties on yield and main agronomic traits in the ecological conditions of the Sichuan Basin, A orthogonal experiment with the mixed orthogonal table （L84×2^4） was carried out, the Mira and ChuanYu-No.5 was used as the planting materials. The results shown that the tuber yield have a significant difference among different treatment of the potassium and phosphorus application. It reached 0.01 significance level. The dry weight of parts Up-ground, height, diameter of stem and the dry weight of root did not show significant difference. But the tuber yield did not show significant difference among different treatment of varieties, The dry weight of parts Up-ground, height, diameter of stem and the dry weight of root shown a significant difference among different treatment of varieties, It also reached 0.01 significance level. The experiment shown that quantity of the potassium and phosphorus application are 315kg/hm^2 and 270kg/hm^2 the yield of Mira can reach 24015kg/hm^2 in the ecological conditions of the Sichuan Basin.