Analysis on Distribution Characteristics of Soil Nutrient in Silt Land by Flood with High Content of Sand

Understanding the distribution characteristics of soil nutrients in silt land by flood with high content of sand is very important to improving blown-sand soil and utilizing alluvial soil.It sample the 0-100 cm section of blown-sand soil,new silt land and silted tilth in the flood irrigation area of Gongwusu,Erdos,Inner Mongolia,and the organic matter,total nitrogen and phosphorus and potassium,available nitrogen and phosphorus and potassium were mensurated,in order to analyze distribution characteristic of soil nutrient after silting up using the flood with high sand in 2005.The results showed that as far as the horizontal distribution of nutrient is concerned,the nutrient content was high in upper reaches of silted soil,and had good improved effect,but nutrients distribution is different among the upper,the middle and the lower reaches of an irrigated area.As far as the vertical distribution is concerned,other than the nutrient content was rich in topsoil of new silt land,the deeper soil(40 cm)were all influenced by silt.The texture layered characteristics of silted tilth was significant,and the content of organic matter,total nitrogen,alkali-hydrolysis nitrogen,rapidly available phosphor,rapidly available potassium were related to soil texture layered.