石河子绿洲区苜蓿地丛枝菌根真菌的多样性及与土壤因子的关系

Arbuscular mycorrhizal fungi diversity and its relationship with soil environmental factors in oasis alfalfa planting of Shihezi

以石河子绿洲区苜蓿(Medicago sativa)田为研究对象,测定各类采样地土壤养分含量、苜蓿根际AM真菌物种多样性及其与土壤因子的关系。在采样地植被根际土壤中共鉴定出3属24种AM真菌,其中无梗囊霉属(Acaulospora)6种,球囊霉属(Glomus)14种,盾巨孢囊霉属(Scutellaspora)4种,各采样地球霉囊属均为优势种群,并且在各类采样地均出现。通过对土壤因子和孢子密度的相关性分析发现,孢子密度与土壤速效磷、碱解氮呈显著负相关关系(P<0.01),与土壤速效钾、pH和有机质呈现一定的相关性,但不显著(P>0.05)。

The aim of this study was to measure soil nutrient content,the diversity of alfalfa rhizosphere AM fungi and its relationship with soil factors in each sample site.The results showed that there were 3genera and 21 species of AM fungi in the vegetation rhizosphere soil of total sample areas,including 6species of Acaulospora,14 species of Glomus,4species of Scutellospora.Glomus appeared as the dominant species which was present at all research sites.Spore density significantly and negatively correlated to the soil available phosphorus and alkali-hydrolysis nitrogen(P<0.01),and did not correlate with soil available potassium,pH and organic matter.