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为了提高地瓜单位面积产量,探索地膜对地瓜生长发育的作用,从1981年开始进行试验。三年来主要进行了覆膜对土壤温度、土壤水分、地瓜的生长发育、地瓜对 N、P、K 吸收规律以及高产栽培技术的研究,并且在试验示范基础上,1983年开始推广,取得较好效果。一、覆膜地瓜增产效果和经济效益1981年试验0.04亩,折亩产5400斤,比对照增产55.4%;1982年示范2.18亩,平均亩产6228.2斤,比对照增产65.4%。两年试验结果,地瓜覆膜平均亩产5610.6斤,比不覆膜栽
In order to improve sweet potato yield per unit area, to explore the role of plastic film on the growth and development of sweet potatoes, from 1981 to begin the experiment. In the past three years, the study mainly focused on the effects of plastic film mulching on soil temperature, soil moisture, growth and development of sweet potatoes, absorption of N, P, and K and cultivation techniques of sweet potatoes, and on the basis of experimental demonstration, effect. First, the coated sweet potato yield and economic benefits Experimental 1981,041 acres, fold mu yield 5400 pounds, 55.4% increase over the control; demonstration of 2.18 mu in 1982, an average of 6228.2 kg per mu, an increase of 65.4% over the control. Two years of test results, sweet potato covered an average of 5610.6 kg per mu, than not planted