新型有机无机专用复合肥肥效研究

A STUDY ON THE MODEL OF RATIONAL FERTILIZITION IN MIDDLE- AND LOW-YIELDING FIELD OF SPRING WHEAT IN MOUNTAIN AREA OF JINGYU COUNTY

摘要:

以鸡粪为主要原料的新型有机无机专用夏合肥,分为5种型号,其有机质含量15～20％。氮磷钾含量16.5～25.5％,每吨肥成本340～500元。每公顷施用量500～1000公斤。玉米专用复合肥:T型,代替二铵做底肥施用每公顷节资100元左右:Te型,配合化肥施用,增产6.8～17.5％;W型,完全代替化肥,做底肥一次性施入,每公顷节资150元左右。水稻专用复合肥:在正常施肥基础上,配合施用,增产12.8～24.7％,提早成熟3～5天。烟草专用复合肥:平均增产10.6％,公顷增产烟叶202.5公斤,中上等烟叶比例提高了6.3％。公顷产值增加499.5元,相对值增加了12.7％。

Abstract:

In this paper, the problem of rational fertilizer application in middle-and low-yielding field of spring wheat in mountain area of Jingyu County was studied by using optimum regression model 311—B. The quadratic regression equation between spring wheat and fertilization of N, P₂O₅, K₂O was established and the optimum nutrient quantity, optimum yield and effects of single fertilizer and their interaction were investigated.