摘要
通过对毛乌素沙地草木樨(Melilotus suaveolens)、胡枝子(Leapedeza bicolor)和沙打旺(Astragalus adsurgens)等3种豆科植物根际土壤样品和根样的采集和分析,研究了3种植物根际AM真菌的群落组成和生态分布。试验结果表明,在已分离出的3属28种AM真菌中,球囊霉属(Glomus)种类占绝对优势;3种豆科植物都有较高的AM真菌定殖率和孢子密度,但不同种之间或同一种植物在不同样地之间的AM真菌种类和分布差异显著。AM真菌泡囊定殖率和总定殖率与土壤速效N有显著负相关,其定殖强度可能主要取决于宿主植物和AM真菌的相互选择性。
The colonization coincide of AMF from different host plants, such as Melilotus suaveolens, Leapedeza bicolor and Astragalus adsurgens, was investigated and its relation to soil factors in Maowusu sandland was analyzed. The experiment separated 28 AMF species of 3 genera, Glomus is dominant genera. The host plants were all colonized by AMF and spore density had obvious difference, but the colonization coincides of AMF had a significant diversity in different host plants and had a different effect on the percent colonization of AMF in different sample sites. Soil available N had a significant correlation with vesicular and total colonization of AMF, its colonization rate may be probably influenced by host plants and AMF.
出处
《干旱地区农业研究》
CSCD
北大核心
2007年第2期196-200,共5页
Agricultural Research in the Arid Areas
基金
国家自然科学基金(40471075)
