Effects of Different Management Methods on Stand Growth and Understory Vegetation of Larix principis-rupprechtii in Qinling Mountains

【Objective】Effects of different management methods on stand growth and understory vegetation of Larix principis-rupprechtii in Qinling Mountains were discussed in order to improve ecosystem productivity, optimize management technology of Larix principis-rupprechtii in this area, and provide theoretical and practical basis for sustainable forest management.【Method】Taking the Larix principis-rupprechtii in Pingheliang, a teaching experimental forest farm of Northwest Sci-Tech University of Agriculture and Forestry, as the research object, according to the technical measures of tending and thinning under the guidance of close to natural management, two management treatments were set: thinning（T1, thinning intensity 20%） and window（T2, only a few reserved trees are left, and other trees are cut out to form a square forest window of 32 m×32 m.）, and the unmanaged sample plot was taken as the control（CK）. After 7 years of thinning and window management, the effects of different management methods on stand growth an