Relationship between the short-term thinning of Larix principis-rupprechtii plantation and forest productivity
LI Jun, WANG Yong-Meng, CHEN Bo, ZHAO Xin-Miao, YANG Xin-Bing
(1. Mulan Weichang Forestry Administration of Hebei, 068450, Weichang, Hebei; 2. College of Forest, Agricultural University of Hebei,071000, Baoding, Hebei: China)
Abstract：In order to study the effect of short-term thinning on the growth and productivity of Larix principis-rupprechtii plantation, thinning plots with different reserve densities(450,600,750,900 strains/hm2) and the corresponding control plots were set. Tree height, diameter, individual volume, stand volume, biomass and productivity before and after thinning were measured and calculated. The results show that: with different reserve density, growth of diameter, tree height and individual volume in thinned plots was larger than that in control plots; with decreased reserve density, the stand volume and biomass in thinned plots were less than that in control plots; the productivity of thinned plots decreased by 7 969 kg/ (hm2·a) compared with control,but its growth rate was greater than the control plots.Thinning changed the spatial structure and growth conditions of stand, promoted growth of trees significantly, and increased the economic benefit of forest.
2012, Vol. 10 
