Change of Soil Properties under Slash Pine in Dagangshan,Jiangxi Province

This article deals with the varied regulations of soil properties under slash pine plantation in Shanxia Forest Farm,Dagangshan,Jiangxi Province when it comes to the middle-age and near-matured age after planting on the slashing with cleared brush and other second plantation.The result shows that soil volume weight of the second plantation is obviously higher than that of the middle-aged and near-matured slash pine plantation,but maximum water holding capacity,non-capillary pore and total capillary pore are just contrary.Quantity of bacteria and actinomycetes is the lowest in the middle-aged soil and quantity of fungi rises while time goes by.Activity of oxido reductase in the middle-aged slash pine plantation is obviously lower than that in the near-matured aged plantation and second plantation.Organic nutrient runs higher when trees come older,but content of available phosphate in reverse.