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长期施磷对黄壤旱地磷库变化及地表径流中磷浓度的影响
引用本文:刘方,黄昌勇,何腾兵,钱晓刚,刘元生,罗海波.长期施磷对黄壤旱地磷库变化及地表径流中磷浓度的影响[J].应用生态学报,2003,14(2):196-200.
作者姓名:刘方  黄昌勇  何腾兵  钱晓刚  刘元生  罗海波
作者单位:1. 浙江大学环境与资源学院,杭州310029
2. 贵州大学农学院,贵阳550025
基金项目:国家重点科技攻关计划西部专项资助项目 (2 0 0 0 K0 1 0 4 0 6)
摘    要:对贵州黄壤旱地进行采样以及盆栽试验,探索黄壤旱地磷库的变化及其对地表径流磷量的影响。结果表明,长期施磷后黄壤旱地无机磷占全磷的比例逐渐增高,Al-P、Fc-P和Ca-P积累的顺序为Fe-P>Al-P>Ca-P。长期施磷后黄壤旱地的有效磷和藻类可利用的总磷也不断积累,高磷(Olsen-P>25mg·kg^-1)旱地藻类可利用的总磷与Al-P、Fe-P和Ca-P的相关系数分别为0.859、0.903和0.650,Fc-P对藻类可利用磷量的影响起着最重要的作用。在模拟雨强为63.2mm·h^-1下,降雨30min后,低磷黄壤旱地(Olsen-P为4.62-15.9mg·kg^-1)径流中磷酸根磷含量仅为2.81-4.17μg·L^-1,生物有效性磷含量为0.723-0.876mg·L^-1;高磷黄壤旱地(Olsen-P)为29.4-59.2mg·kg^-1)径流中磷酸根磷含量达到0.026-0.714mg·L^-1,生物有效性磷含量增加到0.996-1.281mg·L^-1;高磷黄壤旱地地表径流磷量能加速水体富营养化的产生。

关 键 词:长期施磷  黄壤旱地  磷库变化  地表径流  磷浓度
文章编号:1001-9332(2003)02-0196-05
修稿时间:2000年12月27

Dynamics of upland field P pool under a long-term application of fertilizer P in yellow soil area and their effects on P concentration in runoff
LIU Fang ,HUANG Changyong ,HE Tengbin ,QIAN Xiaogang ,LIU Yuansheng ,LUO Haibo.Dynamics of upland field P pool under a long-term application of fertilizer P in yellow soil area and their effects on P concentration in runoff[J].Chinese Journal of Applied Ecology,2003,14(2):196-200.
Authors:LIU Fang  HUANG Changyong  HE Tengbin  QIAN Xiaogang  LIU Yuansheng  LUO Haibo
Institution:College of Environment and Resources, Zhejiang University, Hangzhou 310029, China.
Abstract:Studies on the dynamics of upland field P pool under a long-term application of fertilizer P in yellow soil area and their effects on P concentration in runoff showed that the contents of A1-P, Fe-P and Ca-P in soil cultivated layer increased greatly, and Olsen-P and algae-available P also accumulated obviously. The correlation coefficients of algae-available P content in the high-P soils (Olsen-P > 25 mg.kg-1) with the quantities of A1-P, Fe-P and Ca-P were 0.859**, 0.903** and 0.650*, respectively, of which, Fe-P was the most important. By a 30-min rainfall simulation experiment with a constant rainfall rate of 63.2 mm.h-1, the concentrations of dissolved reactive P and bio-available P in runoff from low-P upland fields (Olsen-P 4.62-15.9 mg.kg-1) were 2.81-4.17 micrograms.L-1 and 0.723-0.876 mg.L-1, respectively, whereas their concentrations in runoff from high-P upland fields (Olsen-P 29.4-59.2 mg.kg-1) were 0.026-0.714 mg.L-1 and 0.996-1.281 mg.L-1, respectively. Therefore, runoff from high-P upland fields could accelerate water eutrophication.
Keywords:Yellow soil  Application of P fertilizer  Changes of soil P pool  P concentration in runoff  
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