冻融及枯落物对湿地土壤淋溶液的影响

被引：15

作者：

周旺明 ^{[1
,2
]}

王金达 ^{[1
]}

刘景双 ^{[1
]}

秦胜金 ^{[1
,2
]}

王洋 ^{[1
]}

机构：

[1] 中国科学院东北地理与农业生态研究所

[2] 中国科学院研究生院

来源：

中国环境科学 | 2008年 / 10期

关键词：

冻融; 枯落物; 土壤淋溶液; 沼泽湿地;

D O I：

暂无

中图分类号：

S158 [土壤肥力（土壤肥沃性）];

学科分类号：

0903 ; 090301 ;

摘要：

利用土柱模拟实验,研究冻融和枯落物对土壤淋溶液的影响.结果表明,冻融提高了土壤淋溶液中TN,NH4+-N,TP,PO43-的浓度和流失量,而降低了DOC,NO3--N浓度和流失量.在31d淋溶实验中,枯落物干重残留率为91.81%,C、N、P的残留率分别为81.96%,65.22%和88.89%;枯落物显著提高淋溶液中的C、N、P的含量和流失量(NH4+-N除外),说明枯落物是生态系统重要的营养库;枯落物的C、N、P释放量远远高于淋溶液的C、N、P流失量,表明湿地土壤是枯落物释放出C、N、P的重要汇.

引用

页码：927 / 932

页数：6

共 15 条

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