摘要
为了探明淹水植稻条件下磷元素在土层中的垂直移动、渗漏情况,设置了模拟土柱培养试验。试验以淹水种植水稻为处理,以淹水不种水稻为对照,探讨植稻对模拟土柱(40 cm埋深处)渗漏水有机磷、无机磷、全磷的淋出数量的情况。结果表明,培养试验期间,磷肥在施肥初期渗漏量相对较大,主要集中在施肥后15 d内。无机磷、全磷从总体上看变化不大,流失量与施肥没有明显的相关性,说明磷比较稳定,易被土壤固定。从绝对数量看,模拟土柱中磷的渗漏主要以无机磷为主。淹作条件下,种植水稻与不种植水稻相比,其渗漏水全磷、无机磷的含量较低,而有机磷含量较高。
The question, whether Phosphorus taking place vertical transportation in the soil, remains not clear. Simulated soil column were adopted to study the potentiality of P moving vertically in the soil. In this article, the TP, IP and OP in the eluate of soil column were analyzed. Results showed that P leakage amounts were increased gradually in first 15 days after fertilizer application, but thei＇e was no significant correlation between P leakage amounts and fertilization amount. The concentrations of TP and IP in the eluate were great lower than that of OP, and IP was the dominant species in leaching water.
出处
《湖南农业科学》
2007年第1期49-51,共3页
Hunan Agricultural Sciences
基金
江苏省自然科学基金资助项目
关键词
淹水
水稻
磷
渗漏
waterlogged
rice
phosphor
leakage
