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贵州省黄壤有效磷素缺乏,施用磷肥一般增产效果明显。据贵州省1963—1965年磷肥试验、示范、推广经验总结:每斤磷肥平均增产稻谷2.54斤、玉米1.67斤、小麦1.06斤、油菜0.91斤。但是,由于黄壤对磷酸的强烈固定作用,磷肥利用率往往很低,因而提高磷肥利用率对农业生产具有一定的意义。国内外很多研究者认为腐殖酸盐与磷肥共用能够减少磷酸的固定,增加作物吸收肥料磷的比例,提高磷肥利用率。而近几年来
There is a lack of available phosphorus in yellow soil in Guizhou Province. According to the experiment of demonstration experiment and demonstration of phosphate fertilizer from 1963 to 1965 in Guizhou Province, the average yield of phosphorus fertilizer per kilogram was 2.54 kg of rice, 1.67 kg of corn, 1.06 kg of wheat and 0.91 kg of rapeseed. However, due to the strong fixation effect of yellow soil on phosphoric acid, the utilization rate of P fertilizer is often very low, so improving the utilization rate of P fertilizer is of certain significance to agricultural production. Many domestic and foreign researchers believe that the use of humic acid and phosphate fertilizer can reduce the phosphate fixation, increase the proportion of fertilizer to absorb phosphorus in crops and increase the utilization of phosphate fertilizer. In recent years