Soil Nutrients in Typical Secondary Forests and Plantations of Pinus koraiensis in Eastern Liaoning Province
Soil nutrient of the typical secondary forests and plantations of Pinus koraiensis in eastern Liaoning Prov-ince were analyzed by using principal component analysis.Result shows that plantation and secondary forests of Pi-nus koraiensis have significant differences in terms of nutrient characteristics.Chemical nutrients of soil in secondary forest of Pinus koraiensis are significantly higher than that of Pinus koraiensis plantation.Chemical nutrients in for-est soils were greatly affected by organic matter and total N of soil.Mixed afforestation work between Pinus ko-raiensis plantation and broad-leaved species were proposed to be conduct so as to improve soil fertility and water conservation function in forest land.