Study On Soil Nutrient Different Status In Farmland Of Erlong Mountain In Heilongjiang Province

Since the implementation of land contract,the land management has changed greatly of Erlongshan farming in Heilongjiang province,in order to exploring the suitability of local production and the most appropriate ecological scientific of fertilization program, and implementing of nutrient partition management, effective control of farm nutrient flows and establish an effective fertility of soil system. This paper continuously studied the soil nutrient Erlongshan farmland in Heilongjiang province,including three aspects:differences in soil nutrient status of the different soil types within the region,soil nutrient content of different farmers in different conditions and the rotation system and fertilization on soil nutrient content under the same soil type. The main conclusions are as follows:1. Different levels of soil nutrients under different soil types. The level of soil organic matter content as follows:black soil> meadow black soil> forest brown soil> marsh soil;potassium contents were as follows:black soil > marsh soil> meadow black soil> forest brown soil; soil nitrogen contents were as follows:black soil > meadow black soil> forest brown soil> marsh soil;soil total nitrogen contents were as follows:black soil> forest brown soil> soil meadow black soil> marsh soil;soil phosphorus contents were as follows:marsh soil> meadow black soil> black soil > forest brown soil. The level of soil total phosphorus content as follows:marsh soil> Soil> meadow black soil> forest brown soil. The differences of various nutrients vary with soil depth in different soil conditions. The soil nutrients showed a different relationship, and it has the maximum correlation between pH and organic matter,the relevant number was 0.912,potassium and organic matter have the least related,the correlation coefficient was 0.384,it did not show the relationship between total phosphorus and other nutrients in the soil.2. The differences of soil nutrient content analysis studies on the same soil types under different growers show that:farmers growing habits affect the soil nutrient content,there has the most obvious on soil potassium,nitrogen and phosphorus of farmers growing habits, and on soil organic matter,total phosphorus,total nitrogen and PH less affected. 3. Soil total phosphorus,total nitrogen content and the PH value of the programs was no significant difference in a variety of crop rotation and fertilization,the total K and organic matter content are significantly different in the crop rotation and fertilization programs after the implementation of different crop rotation and fertilization scheme later planted soybeans.