崩岗区不同植被覆盖度对土壤氮素含量的影响  

Effects of different vegetations on soil nitrogen in Benggang zone

作　　者：梁美霞[1,2] 陈志彪[1,3] 姜超 区晓琳[1] LIANG Meixia;CHEN Zhibiao;JIANG Chao;OU Xiaolin(Geography Science College,Fujian Normal University,Fuzhou Fujian 350007,China;School of Resources ＆ Environmental Science,Quanzhou Normal University,Quanzhou Fujian 362000,China;Key Laboratory for Subtropical Mountain Ecology（Mlinistry of Science and Technology and Fujian Province funded）,Fuzhou 350007,China)

机构地区：[1]福建师范大学地理科学学院,福建福州350007 [2]泉州师范学院资源与环境科学学院,福建泉州362000 [3]湿润亚热带山地生态国家重点实验室培育基地,福建福州350007

出　　处：《生态科学》2018年第4期81-85,共5页Ecological Science

基　　金：福建省社会发展指导性(重点)项目(2016Y0024);国家科技支撑计划项目"南方红壤水土流失治理技术及示范"(2013BAC08B03);泉州市科技局科技计划项目(2018Z025);福建省泉州师范学院院士专家工作站(YA0202)

摘　　要：不同植被覆盖度土壤氮素含量变化规律的研究可作为评价生态退化区植被恢复的指标之一。以福建省长汀县濯田镇黄泥坑崩岗群中三种不同植被覆盖度的毗邻崩岗为研究对象,比较其氮素含量的变化及不同部位氮素含量的变化规律。结果表明:植被覆盖度的提高能有效地减少土壤侵蚀,且与土壤的全氮含量及各部位的全氮含量均达到显著正相关,但同时也会增加硝态氮和铵态氮的流失,从而导致土壤中硝态氮、铵态氮的含量反而减少。而这三种不同植被覆盖度崩岗的全氮含量最高值均出现在集水坡面部位。与裸露崩岗和低覆盖崩岗不同的是,高覆盖崩岗的硝态氮与铵态氮的最大值也均出现在集水坡面部位。The rule of soil nitrogen content change affected by different vegetations coverage can be used as one of the indicators for evaluating the effects of vegetation restoration in ecological degradation area. The nitrogen contents in three Benggangs in Huangnikeng, Zhuotian town, Changting county of Fujian province covered by different vegetations, were measured for revealing the nitrogen changes in different parts of the Benggang system under different vegetations. The results show that each part of the total soil nitrogen content and total nitrogen content had a significant positive correlation with the increase of vegetation coverage. Increasing vegetable cover on soil was an available method of controlling soil erosion and increasing the soil total nitrogen content. Nevertheless, it might increase the loss of soil nitrate nitrogen and ammonium nitrogen which led to the decrease of the content. The total soil nitrogen of three Benggangs showed the highest in the water collecting hill slope under the same vegetation. The nitrate nitrogen and ammonium nitrogen also showed the highest content in the water collecting hill slope in Benggang Ⅲ.

关 键 词：土壤氮素 植被覆盖度 崩岗区 

分 类 号：S153.61[农业科学—土壤学] X171.1[农业科学—农业基础科学]