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1984—1985年作者在中等肥力的荒漠灰钙土上,进行了甜菜氮磷营养规律的研究,即每生产1吨甜菜需要吸收氮5.4公斤,磷0.617公斤,土壤中速效氮的消耗量为4.96公斤,速效磷的消耗量为1.1公斤.氮磷化肥的适量试验,每亩单施氮肥2.5—2C公斤处理的,分别比对照增产7.5—24.3%.增糖率4.7—32.5%,氮磷配施的处理,即每亩NP各2.5—20公斤,分别比对照增产16.2—34.8%,增糖率3.7—27.6%,单施氮的,每亩不得超过10公斤.氮磷配比,以1:0.25,1:0.5,1:1,其产量和产糖量差异不大.不同施期的试验以磷肥为种肥,氮肥为追肥,追肥期以5月中旬和6月中旬一次追为最好.经济效益.以每亩单施氮肥10公斤,亩收益85元,每亩施氮磷各2.5公斤和氮磷各5公斤,每亩增益40元.
From 1984 to 1985, the authors studied the regularity of nitrogen and phosphorus nutrition in sugar beet in moderately fertile desert calcareous soil, that is 5.4 kg of nitrogen and 0.617 kg of phosphorus were needed to produce 1 ton of beet. The consumption of available nitrogen in soil was 4.96 Kg, available phosphorus consumption of 1.1 kg.Nitrogen and phosphorus fertilizer appropriate amount of test, per acre of nitrogen fertilizer 2.5-2C kg treatment, respectively, yield increased by 7.5-24.3% compared with the control, the rate of increase in sugar 4.7-32.5%, nitrogen and phosphorus with Shi treatment, that is, each NPA 2.5-20 kilograms, respectively, 16.2-34.8% increase in yield than the control, the rate of 3.7-27.6% increase in sugar, nitrogen alone, no more than 10 kg per acre. Nitrogen and phosphorus ratio, with 1 : 0.25, 1: 0.5, 1: 1, the yield and yield of sugar is not different.Different application of phosphate fertilizer test for different kinds of fertilizer, nitrogen fertilizer for the top dressing, top dressing time in mid-May and mid-June chase once Economic Benefit: Applying 10 kilograms of nitrogen fertilizer per acre, the yield of mu is 85 yuan, 2.5 kilograms of nitrogen and phosphorus per acre, 5 kilograms of nitrogen and phosphorus, and a gain of 40 yuan per mu.