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近两年来,我们在微最元素的肥效试验中,留意到在石灰性反应的水稻土上(pH8.0左右)锌肥对水稻有一定的增产效果。在此基础上,1980和1981年我们又在该种土壤上探讨了锌肥与磷肥配合施用对水稻的肥效。现将结果总结于下。试验经过试验在余杭县石鸽公社沈家大队第10生产队进行。土壤为低丘红壤发育的水稻土,由于长期大量施用石灰,土壤石灰性反应较强。土壤有机质含量2.35％,速效氮25ppm,速效磷17.5ppm,速效钾11.1ppm,pH8.0。前作为绿肥紫云英,亩产鲜草一千斤左右。
In the past two years, we have observed that in the most fertilizing microelements experiments, we noticed that zinc fertilizer has a certain yield increasing effect on paddy soil with calcareous reaction (about pH8.0). On this basis, in 1980 and 1981, we also discussed the fertilizer effect of zinc and phosphate fertilizers on this soil. The results are summarized below. The experiment was tested in No.10 Production Team, Shenjia Brigade, Stone Pigeon Commune, Yuhang County. The soil is the paddy soil developed in the hilly red soil. Due to the long-term large-scale application of lime, the soil lime reaction is strong. Soil organic matter content 2.35%, available nitrogen 25ppm, available phosphorus 17.5ppm, available potassium 11.1ppm, pH8.0. As a former green Shi Weiyun, yield about a kilogram of fresh grass.