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1976年秋季,我院与望洪公社协作进行了全公社的土壤普查,发现全公社耕地中,速效磷(纯P)含量小于4.4PPM的占耕地总面积66.7％,小于2.2PPM的占耕地总面积17.3％,为缺磷和严重缺磷水平。为了验证这一判断,去年我院又与望洪公社协作,共同进行了“春小麦磷肥肥效试验”。一、磷肥对春小麦产量与植株性状有显著影响试验地选择在望洪公社农丰五队的稻早轮作田上,土壤类型为淤灌(熟化)草甸土,质地以轻壤为主,当地群众称为“夹沙土”。施肥前土壤耕层(O～20厘米)有机质含量为1.23％,全氮量0.078％,水解氮31.0PPM,全磷量0.065％,速效性磷5.8PPM,全盐量
In the autumn of 1976, our institute cooperated with Wanghong Commune to conduct the soil survey of the whole commune. It was found that the total area of cultivated land occupied 66.7% of the cultivated land in the commune with the available P content less than 4.4PPM and less than 2.2PPM Area of 17.3%, phosphorus deficiency and severe phosphorus deficiency. In order to verify this judgment, last year our hospital cooperated with Wanghong Commune to carry out the “Fertilizer Efficiency Test of Spring Wheat Phosphate Fertilizer.” First, the phosphate fertilizer on spring wheat yield and plant traits have significantly affected the trial to choose Wangnong commune Nongfeng five teams of rice early rotation cropland, the soil type of silt irrigation (mature) meadow soil, the texture of light soil-based, local people said As “sand folder soil.” Soil fertility before fertilization (O ~ 20 cm) organic matter content of 1.23%, 0.078% of total nitrogen, hydrolysable nitrogen 31.0PPM, 0.065% of total phosphorus, available phosphorus 5.8PPM, total salt