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合理施肥是提高大豆产量及改善品质的一项有效措施。目前,我省大豆施用磷肥的增产作用已被生产实践所证实,但钾肥对大豆的肥效往往被人们所忽视。近年来南方的很多试验证明,在缺钾的土壤上施用钾肥,可使粮、棉、油、糖料和经济作物增产10～20%。我们先后于1964～1965年及1972年在沈阳农学院棕黄土上,对大豆进行了钾肥肥效试验,增产均在10～15%;1974～1975年在铁岭农校附近的山地淤土上又进行了钾肥的肥效试验研究,为了找出在棕黄土上种植大豆施用磷钾肥的适宜配比又于1980年布置了盆栽试验。
Rational fertilization is an effective measure to increase soybean yield and improve quality. At present, the yield-increasing effect of applying phosphate fertilizer in soybean in our province has been confirmed by production practices. However, the fertilizer efficiency of potassium fertilizer on soybean is often neglected by people. In recent years, many experiments in the South have proved that the application of potassium fertilizer to potassium-deficient soils can increase yields of grain, cotton, oil, sugar and cash crops by 10-20%. We successively tested the effect of fertilizer on soybean in the brown loess soil of Shenyang Agricultural College from 1964 to 1965 and in 1972, with the increase of yield being 10-15%. In 1974 ~ 1975, it was carried out again on the mountain silt near Tieling Agricultural School Fertilizer effect of potash fertilizer test study, in order to find out the appropriate ratio of phosphorus and potassium fertilizer in the planting of soybean on brown soil and in potting experiment was arranged in 1980.