紫云英与化肥配施对水稻生长和土壤养分含量的影响

2009年在河南省信阳市农业科学研究所进行了紫云英(Astragaius sinicus L.)与化肥配施对水稻生长(Oryza sativa L.)和土壤养分含量影响试验。结果表明:紫云英和化肥配施可促进水稻生长,增加水稻产量,增加土壤有机质含量,提高土壤速效氮、磷、钾含量。其中,80%化肥的4个处理水稻的总产量为37205.63kg·hm-2,60%化肥的4个处理水稻的总产量为37395.01kg·hm-2。从紫云英翻压量来看,15000kg·hm-2的2个处理水稻总产量为19297.901kg·hm-2,22500kg·hm-2的2个处理水稻总产量为18956.25kg·hm-2,30000kg·hm-2的2个处理水稻总产量为17718.76kg·hm-2,37500kg·hm-2的2个处理水稻总产量为18628.13kg·hm-2。总的来看,化肥量60%和紫云英翻压量15000kg·hm-2、22500kg·hm-2配施比较适宜。

Effects of Combined Application of Chinese Milk Vetch and Fertilizer on Rice Growth and Soil Nutrient Content

Rice growth and soil nutrient content of rice fields with combined application of Chinese milk vetch and chemical fertilizer were investigated at Xinyang research institute of agricultural science in 2009. Results showed that application of Chinese milk vetch with chemical fertilizer not only promoted the rice growth and the yield, but also increased the content of soil organic matter, available N, P and K. Among all dosages, the totle yield of 80% chemical fertilizer treatments was 37 205.63 kg·hm-2, and the totle yield of 60% chemical fertilizer treatments was 37 395.01 kg·hm-2. The yield of 15 000 kg·hm-2 Chinese milk vetch treatments was 19 297.901 kg·hm-2, 225 00 kg·hm-2 Chinese milk vetch was 18 956.25 kg·hm-2, 300 00 kg·hm-2 Chinese milk vetch was 17 718.76 kg·hm-2, 37 500 kg·hm-2 Chinese milk vetch was 18 628.13 kg·hm-2. In all, ombined application of 60% chemical fertilizer with 15 000 kg·hm-2 or 22 500 kg·hm-2 Chinese milk vetch was applicable for improving rice yield and soil fertility.