Study on the Differences of Soil Characteristics in Root Zone of Haloxylon Ammodendron in Various Dunes
In order to investigate the spatial distribution and causes of soil nutrients and salinity around the species in desert,this study explored water content,conductivity,total nutrient contents,and available nutrient contents of soil around the taproot in the three types of dunes at the edge of the Ebinur.The results were shown as follows:(1) Soil moisture was the minimum at 0-10 cm away from the surface in the fixed sand dune but at 10-20 cm in the migratory dune and semi-fixed sand dune.It was the most significant (P ＜ 0.05) at the 3m away from the taproot surface.(2) Both soil organic matter and total nitrogen were weak in structural and spatial autocorrelation in migratory dune and semi-fixed sand dune.However,total nutrient and available nutrient contents had superior constitutive property in the fixed sand dune.(3) The spatial distribution of soil nutrient was heterogeneous mainly in the form of strip and patchy and generally tended to be gathering.The gathering areas ranged from 0 to 2 m soil in the migratory dune and fixed sand dune.Longitudinally,nutrient gathered in shallow area (from 10 to 20 cm) in the migratory dune while in deep area (from 20 to 40 cm) in the fixed sand dune,thus forming the "Fertile Island".(4) Compared to other characteristic factors,soil conductivity played a dominant role in migratory dune,and the nutrient factor dominated in the semi-fixed sand dune and fixed sand dune.
NETL
NSTL
万方数据
维普
