Correlation Study of AM and DSE Fungi and Soil Factors in the Rhizosphere of Ammopiptanthus mongolicus

In order to elucidate the spatial distribution of AM and DSE fungi and ecological function of soil factors,we sampled from three different sites such as Yinchuan,Shapotou and Minqin in June 2012.Soil and root samples of Ammopiptanthus mongolicus were collected and divided into five depth intervals,0~10 cm,10~20 cm,20~30 cm,30~40 cm,and 40~50 cm,respectively.The results showed that:(1)A.mongolicus root is infected highly by AM and DSE fungi.The infection and ecological distribution of AM and DSE fungi is different between different spaces.(2)AM fungal colonization of Shapotou significantly higher than that of Minqin and Yinchuan.The highest colonization of DSE is Minqin.The hyphal,vesicular,arbuscular and total colonization of different sample plots were no significantly difference.AM fungal colonization and DSE colonization were no significantly differences in different soil layers of the same sample plot.(3)AM fungal colonization had significantly positive correlation with available P.Vesicular colonization had significantly positive correlation with organic matter,and had extremely significant positive correlation with available P.Colonization intensity was significantly positive correlation with TEG,and were extremely significant positive correlation with available N and available K.DSE had extremely significant positive correlation with EEG,and had significantly positive correlation with available N.(4)Path analysis showed that organic matter,EEG and available K directly affects the colonization of AM and DSE.The study for expound the symbiotic relationship between soil fungi with A.mongolicus,soil fungal resources to promote A.mongolicus' growth and the diagnosis of desert soil provides the basis.