The Influences Of The Different Ways Of Land Use On Saline Alkali Soil Chemical Properties In The West Of Jilin Province

The nature of saline alkali soil is poor and difficult to use, saline alkali soil is the end production of the crustal material migration, it belongs to a huge area and is a kind of important land resources.In view of the current social population increase and land decrease, the contradiction between human society development and land resource shortage is becoming more and more acute; in the west of Jilin province,saline alkali soil area can be exploited and utilized to increase grain yield.Through the on-the-spot investigation of Jilin Province in the western region of saline alkali soil, this article suggests different land utilization types of saline alkali soil for analysis and determine the content difference of distribution. Explore under the western different utilization ways soil: upland field, paddy field the grass and saline alkali soil’s chemical properties in Jilin Province and provide data reference for saline alkali land improvement and utilization.The results of this study are as follows:(1)The total organic matter content of the soil in the study area was low and the difference was significant between different utilization methods.Organic matter content showed upland field soil> paddy field soil >grass soil>saline alkali soil,much soil texture rendering clay bullish and the mean value of CEC content is stable at about 20cmol/kg.(2)The content of soil available N presented that:upland field soil>grass soil>saline alkali soil,the content of available P of upland field was significantly higher than the other two methods and both grass soil and saline alkali soil’s effect P distribution is quite similar.There was no significant regularity to the contents of available K, it was higher in different utilization and it’s distribution was extensive.(3)The soil p H was higher in the study area,upland field soil p H was mainly distributed in between 8.22 to 9.45,significantly lower than other utilization of soil and most of p H in paddy field, grassland and saline alkali soil were more than 10.Upland field soil, paddy field and most of the grassland soil electrical conductivity less than 0.37ms/cm and saline alkali soil conductivity mean and dispersion are higher than other soil types.(4)No matter what kind of ion,the content of soil salt ions and degree of dispersion were high in the study area, the soil is not affected by the distribution and content of ions in different utilization ways,also there is no universal law of different salt ions.Soil alkalinity was high, and the alkalinity of most soil samples was more than 20%;High total alkalinity, HCO3-, CO32-distribution was extensive and more and the maximum frequency were between2.45-4.9 range.Under the influence of Ca2+and Mg2+, the relative activity of the Na+and the soil exchangereaction was lower, and the SAR was lower than that of the soil exchange reaction.