Abstract:

The effects of soil particle composition and available nutrient were discussed under different soil and water conservation measures in Jilin Low Mountain and Mound area. The results showed that the measure of ecology restoration would be the best choice to cure small watershed, and restore soil fertilize. The contents of clay of soil and water conservation measures were lower than which of bare plot, and the contents of clay in the depth of 0-20 cm were higher than which of 20-40 cm. The restore effect of soil available N was better than that of available P and K. Available nutrient content and soil particle composition content was not significant correlation, except available P content and soil particle composition content in the depth of 20-40 cm was very significant negative correlation. To controlling black soil degraded tendency and ensuring ecology security, improvement of soil fertility should be considered with local plenty straw and stalk when soil loss was comprehensive cured corresponding to national demand.