The Characteristics Of Saline-alkaline Patches In Xinjiang Farmland Oasis Soil

With Saline-alkaline patches as the object of the research in Manas, through field investigation and laboratory analysis of Saline-alkaline patches sampling, this paper discusses the characteristics of saline-alkaline patches inside and outside of soil profile,patch effect,texture and p H, and obtained the following results:(1) The formation of Saline-alkaline patches and salt-related investigation accounted for 51.2percent of the total number of samples, according to the salt content of patches heart to divided salinity patches into four kinds of salinization type: slightly,moderately,severly saline-alkaline,and saline soil.The difference is significant(P<0.01) in salt content from patches heart to out: patches heart > edge> external,in the soil profile, severly salinization and surface characteristics in salt type of Saline-alkaline patches are most obvious(0-10 cm), the soil salt accumulation zone down to 10-20 cm in moderately salinization,salt content of slight Saline-alkaline patches has a relatively average distribution in the profile, the patch effect from Saline-alkaline patches show a weakening trend from within to external, the patch effect from Saline-alkaline patches in same sites was not significant.(2) Soil silt percentage of all varies of salinization degree of Saline-alkaline patches were greater than sand and clay, change in the salinization salinity of the soil profile of particle is not obvious, the Saline-alkaline patches between the amount of salt types are mainly clay loam texture,the proportion of light, medium, heavy, salt powder grain in average content more than50%, salt powder percentage of severly salinization is 62.64%,sand is decreassing relatively.(3) The p H of Saline-alkaline patches is upper 8, the Saline-alkaline patches of severly salinization has the biggest pH, the slightly and moderately degree of salinization of Saline-alkaline patches has the minimum p H, coefficient of variation is small, belongs to the weak variation and medium level in variation, the maximum variation coefficient was 1.43 times of the minimum.The soil p H in all the salinization degree types of salinity profiles have small variations.The salinization degree of saline for the salt and texture have the following correlation: from sand to silt and clay has significant negative correlation to the significant positive correlation, and the p H value of the correlation only saline soil and moderately salinization saline plaques associated with soil salinity, soil texture and pH has become the important influencing factors in salt accumulation. The research results can provide basic data and improvement ideas for carrying out comprehensive treatment of saline and alkaline land in Oasis farmland in the future.