摘要
采用室内恒温培养试验,主要研究不同水分条件和加秸秆对石灰性土壤磷素形态转化的影响.结果指出,淹水促进石灰性土壤无机磷特别是外加磷向Fe-P和O-P转化,而拟旱则使土壤维持较高的Ca2-P和Ca8—P;淹水—回旱的土壤以Ca2—P和Ca8—P较高,但拟导—淹水的则以Fe—P和O—P较高;淹水后回旱比淹水更能使土壤拥有较多的Ca2—P和Ca8—P,而拟旱后淹水比拟旱有较高的Al—P、Fe—P和O—P.
The incubation at constant temperature(25±1)℃ was conducted to study the effects of flooding and drainage on the morphological transformation of phosphates in limy soils. The results indicated that: (a) flooding promoted phosphates, especially the applied phosphates transformation to Fe-P and O-P in limy soils, while drainage made the soils maintain higher Ca2-P and Cas-P levels; (b) Ca2-P and Ca8-P increased during the flooding-drainage cycle period and Fe-P and O-P increased during drainage-flooding cycle period; (c) pH and Eh of Huang soils decreased markedly by flooding, but those of red limeston soil did not.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
1994年第1期65-70,共6页
Journal of Nanjing Agricultural University
基金
中国科学院南京土壤研究所开放实验室基金
关键词
淹水
磷素
石灰性土壤
秸秆
flooding & drainage
phosphate
morphological transformation
limy soil