摘要
当前三江源区高寒草甸在气候变化和人类活动作用下已经大面积退化。由于该区域地势复杂,除滩地之外,不同坡度的退化草地治理技术研究亟待加强。针对退化草地恢复已有大量研究,然而对草地干扰相对较低的无纺布覆盖技术研究薄弱。基于以上,在三江源区不同坡度的高寒退化草甸通过铺设无纺布,来探讨无纺布对不同坡度退化草地植被及土壤理化性质的影响。结果发现:缓坡地地上生物量、植被高度、土壤水分显著低于陡坡地;无纺布覆盖能显著提升植被地上生物量、盖度、物种分盖度和、含水量以及碳、氮积累;且对缓坡地植被地上生物量、物种分盖度和及土壤水分的促进幅度更大。因此无纺布覆盖对植被及土壤提升效应说明这是一项适宜于高寒退化草甸的恢复技术,特别对水热条件相对较差的缓坡退化草地治理中,此项技术适宜推广。
In recent years,climate change and human activities have aggravated the degradation of alpine meadow in Qinghai Tibetan,in which had the characteristic of complex terrain and large slope span.Multiple restoration measures for degraded grassland were set in this area.Among these methods,the technology of relatively low interference to grassland-non woven fabric coverage could reduce the loss of water,and stabilize the fluctuation of soil temperature,which was more widely used in restoration of degraded grassland.However,the research for this technology was rare in alpine degraded meadow,especially on the habitat of different slopes.The study tested the effect of non-woven fabric coverage on the plant vegetation and soil physicochemical characteristics of alpine degraded meadow in gentle and steep slope.The result suggested that the plant above-ground biomass,average height,and the content of soil water in gentle slope were lower than in steep slope.Moreover,above-ground biomass,vegetation coverage,the sum of species coverage,soil water,and the content of soil carbon and nitrogen were promoted on non-woven fabric coverage.The interaction between non-woven fabric and slope significantly promoted the plant above-ground biomass,the sum of species coverage and the content of soil water,and the magnitude of positive effect was higher in gentle slope.These findings suggested that the non-woven fabric coverage was a suitable way for restoration of alpine degraded meadow,especially in gentle slope.
作者
高志香
梁德飞
李宏林
李希来
GAO Zhixiang;LIANG Defei;LI Honglin;LI Xilai(College of Agriculture and Animal Husbandry,Qinghai University,Xining 810016,China;State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining 810016,China)
出处
《生态科学》
CSCD
2021年第5期8-15,共8页
Ecological Science
基金
国家自然科学基金(31901380)
青海省自然科学基金(2018-ZJ-969Q)。
关键词
无纺布
地上植被
土壤理化
缓坡陡坡
高寒退化草甸
non-woven fabric
plant vegetation
soil characteristics
gentle and steep slope
degraded alpine meadow.
