白浆型水稻土磷肥最佳施用量的试验

The Experimentation of Applying Phosphorus Fertilizer the Best Quantity in the Soils of White Serosity Rice

通过连续4年的试验结果分析表明,在白浆型水稻土上磷肥施用量与土壤中的速效磷呈显著 正相关。减少磷肥施用量水稻植株体内的全磷和全氮含量依次下降,全钾则依次逐增;提高磷肥施用 量可使水稻植株体内全磷含量递减,全氮递增。连续4年施用磷肥的平均产量各处理间差异不显著, 但各试验年度差异显著。根据产量结果分析,在本试验条件下连续施用磷肥67.5kg/hm23～4年后,可 减少磷肥施用量7.2%～35.5%,但必须年年施用磷肥,否则将影响土壤肥力及水稻产量的形成。

According to experimental conclusion about four years. This paper indicates that applying Phosphorus fertilizer quantity was remarkable positively interrelated with the soil content of quick-acting P.in the soils of white serosity rice. Reduced applying P.fertilizer quantity, all Phosphorus and all Nitrogenous content in rice's bodies would descend and all potassium would increase; Increased applying P.fertilizer quantity, all Phosphorus would descend gradually and all Nitrogenous would increase gradually. The average yield's difference in each processor was no remarkable, but the each year's difference was remarkable. According to the yield conclusion, continuing used P.fertilizer quantity about 67.5kg/hm2 after 3～4years. Applying P.fertilizer quantity would be reduced on 7.2～35.5percent.If we don't use P.fertilizer continuously each year in soil, the soil nutrient and the yields of rice would be affected.