生态科学2025，Vol.44Issue(4)：1-8,8.DOI:10.14108/j.cnki.1008-8873.2025.04.001
菌根真菌对温性荒漠草原优势植物根系分解的影响
Effects of arbuscular mycorrhizal fungi on the root deposition of dominant plant in desert steppe
摘要
Abstract
Plant root decomposition is the main underground process of nutrient cycling in grassland,and which is a vital source of grassland soil carbon and nutrients in grassland ecosystems.In order to evaluate the effects of arbuscular mycorrhizal fungi(AMF)on the decomposition of dominant plants root in temperate desert steppe,we used mesh bag method to test the effects of AMF on the root decomposition of Stipa breviflora in situ.The results showed that after 360 days of decomposition,AMF significantly increased the amount and rate of S.breviflora litter loss.During the process of root decomposition,AMF significantly decreased the contents of soil available nitrogen,ammonium nitrogen and nitrate nitrogen,but had few effects on soil available phosphorus content.AMF significantly increased the content of β-1,4-glucosidase in mycelium bags,but had no significant effect on that of cellobiose hydrolase.Root loss rate was positively correlated with AMF hyphal density,the contents of β-1,4-glucosidase content and cellulobiose hydrolase,but was negatively correlated with the content of soil inorganic nitrogen.Preliminary results of the trial indicate that the external hyphae of AMF can participate in plant root decomposition process in temperate desert steppe,and is a vital biological factor which could accelerate root decomposition for S.breviflora.关键词
荒漠草原/短花针茅/根系降解/菌丝密度/土壤酶Key words
desert steppe/Stipa breviflora/root deposition/hyphal density/soil enzyme分类
农业科技引用本文复制引用
吴海妮,王祯,官晓雪,何嘉,郭文龙,杨鑫..菌根真菌对温性荒漠草原优势植物根系分解的影响[J].生态科学,2025,44(4):1-8,8.基金项目
宁夏自然科学基金(2023AAC05012) （2023AAC05012）
国家自然科学基金(32060383) （32060383）
中国科学院"西部之光"青年学者项目(XAB2022YW15) （XAB2022YW15）
宁夏高等学校一流学科建设(草学学科)项目(NXYLXK2017A01) （草学学科）
