不同花生品种(系)农艺性状对氮、磷、钾肥的响应

Response of Agronomic Traits of Different Peanut Varieties(Lines) to N,P,K Fertilizer Application Rate

为探明不同花生品种(系)在贵州种植条件下的需肥规律,进一步提高贵州花生单产水平,本试验以黔花2084、湘花2008、黔花生四号3个品种(系)为参试材料,研究N、P、K肥不同施用量对花生生长发育的影响。结果表明,N肥对花生主茎高和侧枝长促进作用明显,且施用量在300kg/hm2时效果最佳;P肥对花生营养生长和生殖生长均具有促进作用,且施用量在450kg/hm2时最佳;K肥施用量在112.5kg/hm2时对花生增产作用最大。从N、P、K施肥水平对花生增产幅度来看,N肥对花生产量的贡献最大,其次为P肥,K肥对产量的贡献最小,而不同品种(系)在N、P、K肥量的需求方面存在一定差异。

In order to increase the yield of peanut, 7 agronomic traits of 3 peanut varieties （lines）, Qianhua2084, Xianghua2008 and Qianhuasheng4, were investigated and analyzed with different application rate of nitrogen（N）, phosphorus （P） and potassium （K） fertilizer. The result showed that N fertilizer could obviously promote growth and development of main stem and lateral branches of peanut, especially when the fertilizer application rate was 300kg/ha; P fertilizer could promote the vege tative and reproductive growth of peanut comprehensively, especially when the fertilizer application rate was 450 kg/ha; 112.5 kg/ha of K fertilizer could increase peanut yield significantly. From the view of yield increase, the contribution of N fertilizer on peanut yield was the greatest, followed by P fertilizer as the second, and K fertilizer was the minimal. Taking varieties （lines） of peanut into account, 3 different varieties （lines） showed different demand for the amount of N, P, K fertilizers.