[1]师阳阳,陈云明,张光辉,等.不同退耕年限撂荒地植物多样性及生物量分析[J].水土保持研究,2012,19(06):36-40,44.
　SHI Yang-yang,CHEN Yun-ming,ZHANG Guang-hui,et al.Investigation into the Species Diversity and Biomass of Plants in the Abandoned Farmlands with Different Restoration Years[J].Research of Soil and Water Conservation,2012,19(06):36-40,44.
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不同退耕年限撂荒地植物多样性及生物量分析

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 19 期数: 2012年06期 页码: 36-40,44 栏目: 出版日期: 2012-12-20
Title:
Investigation into the Species Diversity and Biomass of Plants in the Abandoned Farmlands with Different Restoration Years
作者:
师阳阳1, 陈云明1,2, 张光辉2,3, 王兵3
1. 西北农林科技大学 林学院, 陕西 杨凌 712100;
2. 西北农林科技大学 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100;
3. 北京师范大学 地理学与遥感科学学院, 北京 100875
Author(s):
SHI Yang-yang1, CHEN Yun-ming1,2, ZHANG Guang-hui2,3, WANG Bing3
1. College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China;
3. College of Geography, Beijing Normal University, Beijing 100875, China
关键词:
退耕还林(草); 撂荒地; 物种多样性; 生物量; 根长密度
Keywords:
conversion of cropland to forest or grass land; abandoned farmlands; species diversity; biomass; root length density
分类号:
Q149
摘要:
退耕还林(草)作为黄土高原水土流失综合治理的主要生态建设措施,经过几十年的开展,黄土高原生态环境得到极大恢复,林草覆盖率明显增加.以安塞县纸坊沟流域为研究区,选取坡耕地(0 a)为对照,研究了退耕年限(3~5,10,18,28,37 a)对撂荒地植物多样性和生物量的影响.结果表明,随退耕年限的延长,物种丰富度指数、多样性指数、均匀度指数、相同土层根长密度都表现为增大-减小-增大的趋势;植被盖度和地上生物量表现为37 a>28 a>18 a>3~5 a>10 a>0 a;撂荒地植被根系生物量、根长密度均随土层深度增加而减少;不同退耕年限撂荒地,相同层根系生物量表现为28 a>37 a>18 a>3~5 a>10 a>0 a.
Abstract:
As one of the major ecological construction measures for comprehensive control of soil and water losses on the Loess Plateau, the implement of the ’conversion of cropland to forest or grass land’ project has greatly improved the eco-environmental condition and the vegetation coverage significantly during the past decades. It was conducted to investigate the potential effects of vegetation restoration years(3~5 a, 10 a, 18 a, 28 a, 37 a) on species diversity and biomass of plant in Zhifanggou watershed. The results indicated that indices of species richness, species diversity, community evenness and root length density in the same soil layer increased at the initial period, afterward those parameters decreased, and finally increased as the restoration age increased from 0 to 37 a. The variations in vegetation coverage and aboveground biomass followed the order: 37 a>28 a>18 a>3~5 a>10 a>0 a. Both of root biomass and root length density decreased with the increase of soil depth. The root biomass also increased with restoration years significantly.

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备注/Memo

收稿日期:2012-4-21;改回日期:2012-5-25。
基金项目:中国科学院百人计划项目;国家"十二五"科技支撑计划"梁峁丘陵沟壑区农田耕作及林草生物措施防蚀及关键技术集成与示范项目"(2011BAD31B05-02)
作者简介:师阳阳(1987- ),女,山西省长治市人,硕士研究生,主要从事流域生态学研究.E-mail:shiyangyang@nwsuaf.edu.cn
通讯作者:陈云明(1967- ),男,陕西省澄城县人,博士,研究员,主要从事植被生态与水文研究.E-mail:ymchen@ms.iswc.ac.cn

更新日期/Last Update: 1900-01-01