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一、试验方法试验地面黄土,中壤,肥力中等偏上,全氮0.189％,全磷0.095％,排水良好,前作油菜,5月5日至8日收获,5月8日施土渣粪每亩2,917斤,(一半面积施,一半面积不施)过磷酸钙每亩50斤,5月9日牛耕3寸左右,耙碎开厢,厢宽12尺,长20尺,小区面积240平方尺,共16个小区,厢沟宽1.2尺,深5寸,品种华棉7号,营养钵育苗,4月12日播种,5月13日移栽,宽窄行种植,2—1尺×0.4尺,计划密度每亩一万株,设四个试验处理。甲处理每亩施纯N13.08斤,乙处理每亩施纯N22.76斤,丙处理每商施纯N32.76
First, the test method Test ground Loess, medium soil fertility medium upper, 0.189% of total nitrogen, total phosphorus 0.095%, well drained, before the rape, May 5-8 May harvest, May 8 soil residue dung per Mu 2,917 pounds, (half of the area facilities, half area not Shi) per acre 50 kg of grapes, May 9 cattle 3-inch or so, rake broken open box, 12 feet wide, 20 feet long, 240 square plot area Ruler, a total of 16 residential areas, Xiangqiu 1.2-meter-wide, 5-inch deep, breed Hua Mian 7, nutrition bowl nursery, April 12 seeding, May 13 transplanting, wide and narrow row plant, 2-1 feet × 0.4 Ruler, the planned density of ten thousand per acre, set four test treatment. A treatment of pure N per unit acre N13.08 kg, B treatment of N per N acre N.27.7 kg, C treatment per commercial pure N32.76