干旱区研究2025，Vol.42Issue(7)：1269-1278,10.DOI:10.13866/j.azr.2025.07.10
气象因子对高寒草地紫花针茅内生真菌共生体凋落物分解的影响
Effects of meteorological factors on the litter decomposition of the fungal endophyte Stipa purpurea symbiont in alpine grassland
摘要
Abstract
Litter decomposition has an important role in the carbon and nutrient cycling of terrestrial ecosystems.Climatic conditions are the main factors involved in litter decomposition.Currently,few studies have examined litter decomposition in alpine grassland ecosystems.To determine the effects of meteorological factors on the lit-ter decomposition and nutrient release processes under a climate change background,the Stipa purpurea endo-phytic fungal symbiont was used along with the litter decomposition bag method to analyze the decomposition characteristics with endophytic fungi(E+)and without endophytic fungi(E-).The effect of meteorological fac-tors on the decomposition rate of Stipa purpurea was analyzed.The results indicated that the decomposition rate of E+was higher compared with that of E-,whereas the decomposition cycle was shorter.With the extension of time,the total nitrogen content of Stipa purpurea showed an increasing trend,lignin content gradually changed from significantly higher in E+to no significant difference between the two,and the cellulose content gradually changed from significantly lower in E+compared with E-(P<0.05).Regardless of endophytic fungi,the litter weight and mass loss rate of Stipa purpurea were correlated with the mean monthly temperature and the mean ground temperature(P<0.05).Precipitation was positively correlated with the litter decomposition rate of Stipa purpurea,and the total nitrogen content of the litter was positively correlated with temperature and precipitation(P<0.05).The lignin and cellulose content were negatively correlated with temperature and precipitation.The du-ration of sunshine had a positive effect on the decomposition of litter,and the lignin,cellulose,and litter weight content were strongly correlated with sunshine duration.Overall,endophytic fungi accelerate the decomposition of Stipa purpurea litter.For E+and E-,the effect of meteorological factors on the decomposition of Stipa pur-purealitter was consistent.关键词
紫花针茅/内生真菌/凋落物分解/气象因子/高寒草地Key words
Stipa purpurea/endophytic fungi/litter decomposition/meteorological factors/alpine grassland引用本文复制引用
郭强,王玉琴,宋梅玲..气象因子对高寒草地紫花针茅内生真菌共生体凋落物分解的影响[J].干旱区研究,2025,42(7):1269-1278,10.基金项目
青海省"高端创新创业人才计划"拔尖人才培养计划项目 （）
