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首页> 外文期刊>Mycorrhiza >Spatio-temporal dynamics of arbuscular mycorrhizal fungi associated with glomalin-related soil protein and soil enzymes in different managed semiarid steppes
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Spatio-temporal dynamics of arbuscular mycorrhizal fungi associated with glomalin-related soil protein and soil enzymes in different managed semiarid steppes

机译:不同管理的半干旱草原丛枝菌根真菌与gloomalin相关的土壤蛋白和土壤酶的时空动态

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摘要

Temporal and spatial patterns of arbuscular mycorrhizal fungi (AMF) and glomalin and soil enzyme activities were investigated in different managed semiarid steppes located in Inner Mongolia, North China. Soils were sampled in a depth up to 30 cm from non-grazed, overgrazed, and naturally restored steppes from June to September. Roots of Leymus chinense (Trin.) Tzvel. and Stipagrandis P. Smirn. were also collected over the same period. Results showed that overgrazing significantly decreased the total mycorrhizal colonization of S. grandis; total colonization of L. chinensis roots was not significantly different in the three managed steppes. Nineteen AMF species belonging to six genera were isolated. Funneliformis and Glomus were dominant genera in all three steppes. Spore density and species richness were mainly influenced by an interaction between plant growth stage and management system (P < 0.001). Spore densities were higher in 0-10-cm soil depth. AMF species richness was significantly positively correlated with soil acid phosphatase activity, alkaline phosphatase activity, and two Bradford-reactive soil protein (BRSP) fractions (P < 0.01). It is concluded that the dynamics of AMF have highly temporal and spatial patterns that are related to soil glomalin and phosphatase activity in different managed semiarid steppes. Based on these observations, AMF communities could be useful indicators for evaluating soil quality and function of semiarid grassland ecosystems
机译:研究了位于中国北方内蒙古的不同管理的半干旱草原上的丛枝菌根真菌(AMF)的时空格局以及gloomalin和土壤酶活性。从6月至9月,从未上草,过度上草和自然恢复的草原中取样的土壤深度最大为30厘米。羊草的根(Trin。)Tzvel。还有Stipagrandis P. Smirn。也是在同一时期收集的。结果表明,过度放牧显着降低了S. grandis的总菌根定植。在三种管理的草原上,中国L.根的总定植没有显着差异。分离出属于六个属的十九种AMF物种。在所有三个草原中,漏斗形目和Glomus均为优势属。孢子密度和物种丰富度主要受植物生长期和管理系统之间相互作用的影响(P <0.001)。在0-10cm土壤深度中,孢子密度更高。 AMF物种丰富度与土壤酸性磷酸酶活性,碱性磷酸酶活性和两个Bradford反应性土壤蛋白(BRSP)组分显着正相关(P <0.01)。结论是,在不同管理的半干旱草原中,AMF的动力学具有高度的时空格局,与土壤胶质蛋白和磷酸酶活性有关。基于这些观察,AMF群落可以作为评估半干旱草原生态系统土壤质量和功能的有用指标

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