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作 者 ：彭思利, 申鸿, 袁俊吉, 郭涛

期 刊 ：植物营养与肥料学报 2010年 16卷 6期 页码：1546-1550

关键词：菌丝；球囊霉素相关土壤蛋白；通径分析；

Keywords:hyphae, glomalin related soil protein, path analysis,

摘 要 ：采用分根装置研究了丛枝菌根真菌侵染白三叶草（Trifolium repens）后对中性紫色土12 mm土壤水稳性团聚体（WSA1_-2mm）含量的影响，并运用通径分析对其主要影响因子进行了量化比较。结果表明，接种Glomus intraradices、G. mosseae和G. etunicatum的菌根室土壤有机质、球囊霉素相关土壤蛋白（GRSP）含量均有增加的趋势; 接种3种菌种都显著增加了菌根室土壤WSA1_-2mm含量。通径分析结果表明，菌丝密度对WSA1_-2mm含量有较大的直接效应（直接通径系数 0.678），而GRSP对WSA1_-2mm的影响系数较小，既有直接效应又有间接效应，但以直接效应为主。菌丝和GRSP对12mm 土壤水稳性团聚体作用大小的差异可能源于二者作用机制的不同。

Abstract:A split root device experiment was used to investigate the influence of arbuscular mycorrhizal (AM) fungi inoculation on 1-2 mm soil water stability aggregates (WSA1_-2mm) in the neutral purple soil while white clover (Trifolium repens) as the host plants. The results show that compared with the non-mycorrhial treatment, the contents of organic matter and glomalin related soil protein (GRSP) of mycorrhizal soil are slightly increased under the inoculation with Glomus intraradices, G. mosseae and G. etunicatum, while the WSA1_-2mm contents of mycorrhizal soil are significantly increased. The results of path analysis indicate that the hyphae density has a high direct effect on WSA1_-2mm(direct path coefficient is 0.678), GRSP has both direct and indirect effect, but through direct effect mainly. The different mechanism of these factors may account for the difference.

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