摘要
田间试验结果表明,因施肥方式不同,粪肥施用对不同磷水平土壤磷流失潜力的影响也不相同。在施用的粪肥与表土混合的情况下,粪肥对土壤磷流失的增加量随土壤磷水平的提高而升高。但当粪肥表施不与土壤混合时,情况有所不同。在粪肥表施初期,无论是高磷土壤还是低磷土壤,地表径流中磷浓度都达到较高水平,施肥引起的土壤磷流失的增加量以低磷土壤更为明显。但粪肥表施较长时间后,粪肥对土壤磷流失的增加量也随土壤磷水平的提高而升高。总的来说,控制地表径流磷流失的效果是粪肥与土混施优于表施,流域内粪肥处置应优先施于土壤磷水平较低的土壤中。
The effects of organic maunre application on P runoff from soils on different P levels varied with application methods . The elevated amounts of soil P runoff induced by organic manure application increased with increasing soil P level when organic manure was mixed with surface soils. The effects were different when the organic manure was applied on the field without mixed with soils. In the latter case, P concentration in the initial runoff water was very high for all soils, and the elevated amounts of soil P runoff from organic manure application were more significant in low P soils than those in high P soils. However, P concentration in the runoff water coflected four months later after the application decreased significantly, and the elevated amounts of soil P runoff from organic manure application increased with increasing soil P level. The results suggested that mixture application of organic manure with soils was more efficient for controlling P runoff loss than direct surface application, and organic manure should be preferentially applied to lower P soils.
出处
《土壤通报》
CAS
CSCD
北大核心
2006年第4期706-709,共4页
Chinese Journal of Soil Science
基金
浙江省科技计划项目(编号2004C33061)
关键词
粪肥
磷积累
磷流失
土壤
Organic manure
P accumulation
P runoff
