论文部分内容阅读
应用“3414”实验设计,研究长春地区氮、磷、钾肥对田间紫花苜蓿草产量的影响及推荐施肥量。结果表明:与未施肥处理相比,各施肥处理均有一定幅度增产,增产率在0.92%~138.03%之间,其中,施氮肥增产率在1.09%~24.21%,施磷肥增产率在57.39%~135.86%,施钾肥增产率在20.44%~62.61%。缺磷、缺钾、缺氮处理的相对产量分别为37.53%、54.69%、71.58%,土壤速效磷、速效钾、速效氮的丰缺状况依次为极缺、中等和丰富。根据肥料效应函数得出,氮(N)、磷(P205)和钾肥(K2O)推荐施肥量分别为9.32 kg/hm~2、103.92 kg/hm~2和34.56 kg/hm~2。
The experiment design of “3414” was used to study the effect of nitrogen, phosphorus and potassium fertilizers on the yield of field alfalfa in Changchun and the recommended fertilization rate. The results showed that compared with non-fertilization treatment, the fertilization treatments all increased yield by a range of 0.92% -138.03%, among which, the yield increase rate of nitrogen fertilizer was 1.09% -24.21%, the yield increase rate of phosphorus fertilizer application was 57.39% ~ 135.86%, and the yield of potash fertilizer increased from 20.44% to 62.61%. The relative yields of phosphorus deficiency, potassium deficiency and nitrogen deficiency treatments were 37.53%, 54.69% and 71.58%, respectively. The abundance and deficiency of soil available phosphorus, available potassium and available nitrogen were extremely deficient, moderate and abundant. According to the fertilizer effect function, the recommended fertilization rates of nitrogen (N), phosphorus (P205) and potassium fertilizer (K2O) were 9.32 kg / hm2, 103.92 kg / hm2 and 34.56 kg / hm2, respectively.