中国东北林区森林土壤中的可溶性有机氮(英文)

被引：8

作者：

宋立臣

郝敬梅

崔晓阳

机构：

[1] 东北林业大学林学院

来源：

Journal of Forestry Research | 2008年 / 01期

关键词：

可溶性有机氮; 微生物氮; 森林土壤; 温带森林; 中国东北部;

D O I：

暂无

中图分类号：

S714 [森林土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

可溶性有机氮(SON)是土壤氮状况的重要指标,然而,对森林土壤中SON的研究却少见报导。本项研究以具有典型高有机质和高有机氮特征的中国东北温带森林土壤为对象,通过早春冻融季节过后采样,得出土壤有机层水溶性SON含量为156.0–292.6mgkg-1,大致与文献报导的用盐溶液提取的SON量相当;而0–15cm矿质土层中水溶性SON含量为58.6–125.2mgkg-1,高于文献报导值3–10倍。土壤水溶性SON在不同林型和不同立地条件下差异很大。水溶性SON与土壤有机质含量和全氮量呈显著正相关,而与微生物氮量(MBN)呈负相关(未达统计学显著水平)。着重讨论了矿质土层SON含量过高以及SON-MBN负相关现象的成因。表4参33。

引用

页码：53 / 57+87 +87

页数：6

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