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1982～1984年中国农科院土肥所(在山东德州地区、京郊)、安徽和河南省土肥所(分别在利辛和汝南县)、廊坊地区农科所(在大城县及黑龙岗地区)等单位组成磷肥协作组,经过三年多点试验示范,针对本地区土壤、作物情况,提出经济合理施用磷肥技术。简介如下: 一、黄淮海中低产地区土壤养分状况黄淮海耕地面积近三亿亩,粮田占70%左右,长期以来,该地区因旱、涝、碱、薄等自然灾害影响,单产一直很低。参加本协作组的冀、鲁、豫、皖四省
1982-1984 Soil and Fertilizer Institute of Chinese Academy of Agricultural Sciences (in Shandong Dezhou area, Beijing suburbs), Anhui and Henan Province, soil and fertilizer (respectively in Lixin and Runan County), Langfang Regional Agricultural Science Institute (in Ayutthaya and Heilonggang ) And other units to form a phosphate fertilizer collaboration group. After more than three years of trial and demonstration, aiming at the situation of soil and crops in this region, the paper put forward the economical and rational application of phosphate fertilizer technology. Brief introduction is as follows: First, the soil nutrients in low-yield areas Huang-Huai-Haihuang Huanghuaihai nearly 300 million acres of arable land, grain fields accounted for about 70% for a long time, due to drought, waterlogging, alkali, thin and other natural disasters in the region, yield has been very low. Participate in the cooperative group of Hebei, Shandong, Henan, Anhui provinces