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为摸索具有较高增产效果和经济效益的化肥施用方法,为鄂沙28棉花品种在我区大面积推广提供施肥依据,1982年我们在所内低丘岗地上进行了棉花鄂沙28的氮磷钾肥配合施用试验。 一、试验材料及方法 试验田土壤为岗地黄土,1979年以前种植水稻,1980—1982年种植方式为棉花—水稻—冬闲—棉花;质地中壤偏重;地势平坦,排灌方便,肥力均匀。经取土化验,土壤基本农化性状为:pH6.2(水浸),有机质1.7736％,全氮0.1216％,全磷0.0784％,全钾1.1949％,速效磷9.7ppm,速效钾109ppm,硝态氮6.38ppm。可以看出,试验地肥力水平一般,但速效氮、磷属中等偏下。
In order to explore with higher yield and economic benefits of fertilizer application methods for the E 28 sand varieties in our area to promote the provision of fertilizer based on a large area in 1982 we were in the low hillock E 28 cotton of N, Cooperate with the application test. First, the test materials and methods The experimental field soil Ganglian loess, 1979 before planting rice, 1980-1982 planting methods for the cotton - paddy - winter leisure - cotton; medium texture of soil heavier; flat topography, irrigation and drainage convenience, fertility uniformity. After soil testing, the soil basic agrochemical properties were: pH6.2 (flooding), organic matter 1.7736%, total nitrogen 0.1216%, total phosphorus 0.0784%, total potassium 1.1949%, available phosphorus 9.7ppm, available potassium 109ppm, nitrate Nitrogen 6.38 ppm. It can be seen that the fertility level in the experiment is normal, but the available nitrogen and phosphorus are in the lower middle.