摘要
以山东省三大土类为供试土壤,研究了在山东平均年降雨量的条件下不同施磷量对磷有效性和磷素淋溶风险的影响。结果表明,随着施磷量的增加,三大土类表层速效磷含量均有明显提高;土壤速效磷能够随水发生垂直迁移,一年降雨强度能使其向下迁移15cm左右,30～100cm土层速效磷基本保持不变;由于固磷能力的差异,褐土磷素淋溶风险最低,其次是潮土,棕壤磷素的淋溶风险最高。
Three soils of Shandong Province were used as tested soils to study the effects of different amounts of P application on P availability and leaching risk under the average annual rainfall of Shandong Province. Results showed that Olsen-P contents in surface layers of three soils were markedly increased when P rates were increased; Olsen-P contents could migrate vertically with water and was migrated down soil profile about 15 cm by annual rainwater; Olsen-P content of 30 - 100 cm soil profiles kept constant. Due to the different ability of P immobility, P leaching risk of cinnamon soil was lowest, then was fluvo-aquic soil, and that of brown soil was highest.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第6期1367-1370,共4页
Chinese Journal of Soil Science
基金
山东省自然科学基金项目(Y2005D11)
"十一五"国家科技支撑计划"沃土工程关键支撑技术研究"项目(2006BAD25B06)资助
关键词
速效磷
淋溶风险
施磷量
褐土
潮土
棕壤
Olsen-P, Leaching risk
P application rate
Cinnamon soil
Fluvo-aquic soil
Brown soil
