摘要
为研究我国北方农牧交错带不同封育时间对干旱、半干旱草原植物特征值及多样性的影响,同时探索农牧交错带草原封育周期,本研究选取位于我国农牧交错带的宁夏盐池人工封育草原为研究对象,采用样方调查法,于每年7-8月份(植物生长季节)对封育区植被生长状况进行调查,调查内容包括:植物名称、植物种数、株数、盖度、高度、地上生物量(鲜重)等。运用生态学、地统计学原理,结合Biodiversity Pro、Microcal Origin等生态学统计软件对外业数据进行处理、分析,结果表明:封育2-3年后植物群落优势种优势地位得到巩固,而一些伴生种则在竞争中消失;封育区植物特征值在封育2-3年后达到最大,如地上生物量(鲜重)在封育3年达到最大值,为6907.75kg/hm2,此后呈下降趋势;封育区主要植物重要值及植物物种多样性均在封育2-3年后出现最大值,此后也不同程度地呈下降趋势。
In order to study the effect of different fencing time to arid and semi - arid grassland＇plant characteristic values and diversity, as well as to find out the optimum fencing period in the ecotone of Agriculture - animal Husbandry in the north of China, quadrat method was quoted to investigate plant growth during the growing season （Jun. , and Aug. ） in the fencing tame grassland, in Yanchi County, Ningxia Hui Autonomous Region. The items investigated were, plant species, individual number, coverage, height, aerial biomass （fresh weight）. Coped with ecological geo - statistic principles, data were processed and analyzed by the ecological statistic software like Biodiversity Pro, Microcal Origin etc. The results showed that after two to tree years＇fencing, dominant plant community reinforced their dominant position with some companion species dying out in the competition. Plant characteristic values peaked during this time and descended later. （For instance, the aerial biomass reached the maximum, 6907.75kg/ha, in the third year after the fencing. ） In addition, both plant species diversity and the main plants＇importance value showed the same trend.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2007年第7期106-110,共5页
Journal of Arid Land Resources and Environment
基金
国家林业局项目(盐池荒漠化定位监测660550)
国家科技攻关项目(2005BA517A04)资助
关键词
农牧交错带
封育时间
植物特征值
重要值
多样性指数
the farming - pastoral ecotones
fencing time
plant characteristic value
importance value
diversity index
作者简介
李瑞（1979-），男，博士生，主要研究方向为生态环境及荒漠化防治与监测。E—mail：flylirui@163.com
责任作者：张克斌（1957-）北京林业大学水土保持学院。E—mail：ctccd@bjfu.edu.cn.
