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以径流小区定位监测为基础,研究了紫色土坡耕地在不同处理下坡耕地磷养分流失现状,研究磷养分流失与施肥量的关系,不同耕作方式对磷流失量的影响.研究结果表明:①磷素流失与降雨量、径流量呈现出一定的相关性,即同一时期内,降雨越多,产流越多,养分流失就越多;②不同的施肥水平下,总磷流失率随着施肥量的增加而增加,增量处理是优化处理时1.53倍.而可溶性磷的迁移与施肥条件没有明显的相关关系;③不同的耕作方式下,顺坡耕作的总磷流失率为横坡垄作的5.34倍;④玉米不同生育期,土壤总磷随地表径流迁移的强度其大小顺序各个处理表现为:抽雄开花期,拔节期,成熟期.
Based on the monitoring and monitoring of runoff plots, the status quo of phosphorus nutrient loss in slope farmland on purple soil sloping land was studied, and the relationship between phosphorus nutrient loss and fertilizer application and the effect of different tillage methods on phosphorus loss were studied. Phosphorus loss and rainfall, runoff showed a certain correlation, that is, during the same period, the more rainfall, the more runoff, the more nutrient loss; ② different levels of fertilizer, total phosphorus loss rate with fertilization The amount of increase and increase treatment is 1.53 times the optimal treatment.While the soluble phosphorus migration and fertilization conditions no significant correlation between; ③Towers of farming methods, slope slope farming total phosphorus loss rate for the slope slope 5.34 times; (4) The intensity of soil total phosphorus with surface runoff migration during different growth stages of corn showed the following order: flowering stage, jointing stage and maturity stage.