摘要
1986～1988年,针对我区豆科作物播种面积减少,土壤肥力逐年下降等问题,进行了不同作物轮作的定位试验.结果表明:采用豆麦轮作后,一般土壤有机质含量比原土壤肥力提高2.2～19.1%,全氮提高1～2%,全磷增长6.9～13.7%;土壤微生物数量有明显的提高;采用豆麦轮作后,三年平均总产比麦类连作增产131.77公斤/亩,比休闲轮作增270.25公斤/亩,亩均增收104.92～261.72元.在增产增收的基础上,每公斤粮食的生产成本下降9～16%.
According to the problems of decrease in sowing area of legume crop and soil fertility years by years in Tibet, An experiment of various crops rotation was conducted during 1986-1988. The results showed that after adopted rotations of legume and wheat, the content of soil organic matter increased by 2.2-19.1%, the total nitrogen increased by 1-2%, the total phosphorous could be raised 6.9-13.9% and the number of microorganisms in soil increased apparently. Simnltantously the average of total yield in three years increased by 1.98 ton per ha and 4.05 ton per ha respectively as compared with that of fallow land and continuous cropping lands of wheat crops. The income increased up to 64%, the production cost dropped by 9-6%.
出处
《西南农业学报》
CSCD
1991年第1期91-97,共7页
Southwest China Journal of Agricultural Sciences
关键词
豆科作物
轮作
培肥
增产效果
产量
Legume crop, Wheat crop, Rotation cropping, Enriching soil,Increasing yield, Tibet
