| 土壤磷淋失机理初步研究 |
| |
| 引用本文： | 杨学云,P.C.Brookes,李生秀.土壤磷淋失机理初步研究[J].植物营养与肥料学报,2004,10(5):479-482. |
| |
| 作者姓名： | 杨学云 P.C.Brookes 李生秀 |
| |
| 作者单位： | 1.西北农林科技大学资源环境学院 陕西 杨凌 712100; |
| |
| 摘 要： | 用石膏标记的方法,研究了蝼土磷素淋移的机理。试验表明,(土娄)土中广泛存在的大孔隙,可能是磷素淋移的主要途径。石膏悬液可以达到的最大可见深度约为90.cm(距灌溉面约70cm)。用200mg/kg磷溶液浇灌,非常明显地提高了沿大孔隙壁深达80.cm土壤的OlsenP含量,但本体土样没有明显提高;试验还观察到石膏悬液可以通过根表到达距地表55cm深的土壤剖面。
|
| 关 键 词： | Olsen-P 石膏悬液 磷淋失 优先流途径 |
| 文章编号： | 1008-505X(2004)05-0479-04 |
| 修稿时间： | 2003年9月14日 |
Preliminary study on mechanism of phosphorus leaching in cumulic cinnamon soil |
| |
| P.C.Brookes.Preliminary study on mechanism of phosphorus leaching in cumulic cinnamon soil[J].Plant Nutrition and Fertilizer Science,2004,10(5):479-482. |
| |
| Authors: | PCBrookes |
| |
| Institution: | 1.Northwest Sci-Tech . Univ. of Agric. and For.;Shaanxi;Yangling 712100;China ; |
| |
| Abstract: | Gypsum leaching method was employed to study the mechanism of cumulic cinnamon soil phosphorus leaching. The results indicated that macro- pore are widely distributed in cumulic cinnamon soil, probably was the main pathway of soil phosphorus leaching losses. Gypsum suspension penetrated through root channel could reach to 53cm from ground in soil profile, and to approximately 90cm in depth through holes of soil animals (perhaps earthworm). Soil profile samples taken from soil treated with 200mg/kg P solution (with gypsum suspension as a indicator) had evidently highest Olsen-P concentration compared with that from bulk samples and no P treated samples (ck) ,and no differences were observed for Olsen-P concentration for bulk soil samples. |
| |
| Keywords: | Olsen-P |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《植物营养与肥料学报》浏览原始摘要信息 |
| 点击此处可从《植物营养与肥料学报》下载免费的PDF全文 |
