摘要
西藏化肥施用始于1964年,在定性和氮磷配合方面的研究较多,但化肥利用率较低,直接影响农民的收入和粮食的产量,为了解决以上的问题,从1990～1998年连续9年在西藏粮食作物上进行了不同时期、不同方法、不同施肥深度、不同量、不同氮磷钾比例、不同元素肥料等6个方面1420个小区施用试验。结果表明4项最佳施肥技术,即追肥以先撒化肥再松土后灌水的方法最好,施肥深度以3～5cm为最佳,施的时间以春季作物分蘖时为最适宜等。提高化肥利用率达30%以上,比以前提高2倍以上。
Fertilizers were applied in 1964 in Tibet,but fertilizer efficiency was low,which directly affected the farm incomes and grain yields.In 1990-1998,the trials of 6 factors,including different time of fertilizer application,fertilizing depth,fertilizer practices,amount of fertilizer applied,N,P,K ratio and fertilizer types in 1420 plots were carried out for grain crops in Tibet.The results showed that there were 4 optimal fertilizer practices,in which fertilizer was applied by spreading firstly,then cultivating the soil and irrigating with 3-5cm depth of fertilizer application,and at the tilling stage as the optimal time of fertilizer application for spring crops.It was concluded that fertilizer efficiency was increased by 30%,which was twice more than that in previous years.
出处
《西南农业学报》
CSCD
2004年第1期31-33,共3页
Southwest China Journal of Agricultural Sciences
基金
西藏自治区攻关项目
