生态学报2017，Vol.37Issue(7)：2300-2306,7.DOI:10.5846/stxb201511242377
接种AM菌对西部黄土区采煤沉陷地柠条生长和土壤的修复效应
Effects of arbuscular mycorrhizal fungi on the growth of Caragana korshinskii Kom.and soil improvement of coal mining subsidence in the Loess Area of West China
摘要
Abstract
China is a country with large amount of consumption and production of coal.However,the exploitation and utilization of coal have resulted in series of ecological environmental problems.The main problem is the destruction of land resources,as coal mining is occupies a large amount of land and destroys surface vegetation.This leads to land subsidence and a large number of cracks,which injures plant roots,thereby affecting plant growth and nutrient uptake,increasing soil nutrients and moisture loss,and reducing soil fertility.As a result,research has been focused on the ecological restoration of mining areas in recent years,including the use for microbial reclamation of arbuscular mycorrhizal (AM) fungi that can form a symbiotic association with ＞ 80％ terrestrial plants.They promote the absorption and utilization of mineral elements and growth of plants,and improve the plants resistance to adverse environment.The effect of AM fungi on the restoration of the mining areas with sandy substrates has been previously studied.However,little is known about the effect of AM fungi on the vegetation and soil restoration in loess mining areas.The present study determined the effects of AM fungi on the growth of the host,Caragana,a loess pioneer plant,and the improvement of rhizosphere soil.The results show that the height,crown,and ground diameter of Caragana inoculated by AM fungi were greater by 29.11％,29.83％,and 14.81％,respectively in August,than in non-inoculated plants in September.The root length,average diameter,surface area,and root volume of inoculated Caragana were greater by 151％,34.2％,116.0％,and 129.3％,respectively,than those of the control.In addition,inoculation of AM fungi enhanced Caragana resistance;the soluble sugar content and catalase activity in the leaves of inoculated Caragana increased by 13.4％ and 111％,respectively.Moreover,Caragana inoculated with AM improved the biological,physical,and chemical properties of soil;the organic matter,available nitrogen,phosphorus,and potassium increased by 7.06 g/kg and 140,1.82,and 16.72 mg/kg,respectively in August.Inoculation with AM significantly increased the number of fungi,actinomycetes,and bacteria,and also increased acid phosphatase activity of the rhizosphere soil.Therefore,AM fungal inoculation promoted Caragana growth and soil improvement in loess coal mining subsidence areas.关键词
丛枝菌根真菌/柠条/根际土壤Key words
arbuscular mycorrhizal fungi/Caragana/rhizosphere soil引用本文复制引用
孙金华,毕银丽,王建文,张延旭,于淼,孙江涛..接种AM菌对西部黄土区采煤沉陷地柠条生长和土壤的修复效应[J].生态学报,2017,37(7):2300-2306,7.基金项目
国家自然科学基金资助项目(51574253) （51574253）
国家863计划(2013AA102904) （2013AA102904）
