浙江天童森林砍伐对土壤养分库和氮矿化硝化特征的影响

生态学杂志

浙江天童森林砍伐对土壤养分库和氮矿化硝化特征的影响

李光耀^1,2,杨晓东^2,3,史青茹^2,3,马文济^2,3,王希华^2,3,阎恩荣^2,3**

(¹皖西学院资源环境与旅游管理学院，安徽六安 237012； ^2华东师范大学环境科学系，上海 200241； ^3浙江天童森林生态系统国家野外科学观测研究站，浙江宁波 315114)

出版日期:2014-03-10 发布日期:2014-03-10

Effects of clear-felling on soil nutrient pools and nitrogen mineralization and nitrification in Tiantong, Zhejiang Province.

LI Guang-yao^1,2, YANG Xiao-dong^2,3, SHI Qing-ru^2,3, MA Wen-ji^2,3, WANG Xi-hua^2,3, YAN En-rong^2,3**

(¹Faculty of Resources, Environment and Tourism Management, West Anhui University, Liuan 237012, Anhui, China; ^2Department of Environmental Science, East China Normal University, Shanghai 200241, China; ³Tiantong National Forest Ecosystem Observation and Research Station, Ningbo 315114, Zhejiang, China)

Online:2014-03-10 Published:2014-03-10

摘要/Abstract

摘要： 揭示不同砍伐频率对森林土壤养分库和氮周转的影响，对于理解森林养分循环的干扰响应具有重要意义。本研究以浙江天童常绿阔叶林为对象，选择了3个具有不同砍伐频率的群落比对组，分析各组内土壤有机碳和氮磷养分库，以及氮素矿化、硝化速率的变化。结果表明：3组群落中，重复砍伐群落的土壤总氮和总有机碳储量显著减小(P<0.05)，而土壤总磷、铵态氮和硝态氮储量、土壤容重显著增加(P<0.05)。土壤氨化速率和氮矿化速率在比对组间无显著差异(P>0.05)，但硝化速率在重复砍伐后显著增加(P<0.05)。本研究表明，土壤养分库和氮转化对森林重复砍伐的响应方式不同。森林重复砍伐后，土壤有机碳库和氮库含量降低，磷库和无机氮库含量增加，氮素矿化和氨化速率变化不显著，硝化速率显著提高。

关键词: 发芽率, 瘤胃消化, 禾本科种子, 消化道传播, 形态学

Abstract: Revealing the effects of forest clear-felling frequencies on soil nutrient pools and nitrogen transformation is important for understanding the response of nutrient cycling to clearfelling. In this study, three pairs of control and clear-felling (at different frequencies) communities were selected in evergreen broad=leaved forests in Tiantong, Zhejiang Province, to study the influence of clear felling on soil organic carbon, nitrogen and phosphorus pools, as well as soil nitrogen mineralization and nitrification. The results showed that repeated clear felling significantly lowered the stocks of soil total nitrogen and organic carbon (P<0.05), while significantly increased soil phosphorus, ammonium and nitrate contents, and soil bulk density (P<0.05). Repeated clear felling did not cause significant changes in soil nitrogen mineralization and ammonification rates (P>0.05), but significantly increased the soil nitrogen nitrification rate (P<0.05).

Key words: germination rate, ramineae seed, morphology, endozoochorous dispersal, rumen digestion.

李光耀1,2,杨晓东2,3,史青茹2,3,马文济2,3,王希华2,3,阎恩荣2,3**. 浙江天童森林砍伐对土壤养分库和氮矿化硝化特征的影响[J]. 生态学杂志.

LI Guang-yao1,2, YANG Xiao-dong2,3, SHI Qing-ru2,3, MA Wen-ji2,3, WANG Xi-hua2,3, YAN En-rong2,3**. Effects of clear-felling on soil nutrient pools and nitrogen mineralization and nitrification in Tiantong, Zhejiang Province.[J]. cje.

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