油菜、棉花双移栽改良中度盐渍土效果研究

Utilization of Seedling and transplanting of rape and cotton to ameliorate medium saline soil

在河南省商丘县的硫酸盐—氯化物中度盐渍土上设置试验.结果表明,连续两年油菜、棉花双育苗双移栽后,土壤(0～20cm)盐分由0.353%下降为0.177%;土壤有机质、全氮、碱解氮和速效磷分别提高了39.0%、12.9%、59.2%和160.8%,仅速效钾减少了12.0%;油菜、棉花一年两熟较一年一季春棉两年平均单位面积净增经济收益84.5%.

Upon two years' seeding and transplanting of rape and cotton, total soil salt(0 20cm) was reduced from 0 353 to 0 177%, whereas SOM, total N, alkaline hydrolysable N, and rapidly available Prnwere increased by 39 0,12 9,59 2,and 160 8% respectively. However, rapidly available K was 12 0% lower. The net profit from the cropping pattem mentioned above was gained by 84 5% compared with one spring cotton pa.