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辽宁省滨海盐渍性水稻土有效磷缺乏,水田施用磷肥具有良好的生理效应与肥效,并有改良土壤、防治稻缩苗、黑根病等效能。自1963年试验推广以来,增施磷肥,已成为农业生产上必不可少的增产措施之一。伴随着种植面积扩大和增产指数的提高,氮磷比例失调日渐严重。磷肥生产由于硫酸缺乏或因磷矿粉不足,致使磷肥生产停滞不前,并有下降。目前磷肥品种单一,质量低劣,数量不足,直接影响农业
Liaoning Province, the coastal saline-paddy soil available phosphorus deficiency, paddy field application of phosphate fertilizer has good physiological effects and fertilizer efficiency, and improved soil, rice mitosis, black root disease and other effects. Since the experimental promotion in 1963, the application of phosphate fertilizer has become an indispensable stimulus for agricultural production. With the expansion of planting area and increase of yield index, the imbalance of nitrogen and phosphorus became increasingly serious. Phosphate fertilizer production due to the lack of sulfuric acid or phosphate rock powder, resulting in phosphate fertilizer production stagnated and declined. At present, a single species of phosphate fertilizer, poor quality, lack of quantity, a direct impact on agriculture