北京林业大学学报Issue(2)：24-31,8.DOI:10.13332/j.cnki.jbfu.2015.02.011
华北落叶松蓄积量及生产力研究
Stock volume and productivity of Larix principis-rupprechtii in northern and northwestern China
摘要
Abstract
With Larix principis-rupprechtii as research subject, we studied the influence of stand ages, site conditions, initial densities, stand reserved densities and land preparation methods on the stock volume of L. principis-rupprechtii by survey of individual tree. Then we analyzed the productivity of L. principis-rupprechtii in Saihanba of Hebei Province and comprehensively compared the productivities of L. principis-rupprechtii in Hebei, Inner Mongolia, Shanxi, Shaanxi, and Ningxia provinces in northern and northwestern China. The results were as follows: 1 ) stock volume of L. principis-rupprechtii increased first and then decreased with the increase of stand age, and the stock volume of 39-year-old forest was the maximum with 193. 5 m3∕hm2 . 2 ) L. principis-rupprechtii stock volumes in 3 site conditions ranked in Mann (98. 55-288. 90 m3∕hm2 ) > rich ubac ( 59. 10 -263. 10 m3∕hm2 ) > thin adret ( 45. 60 -176. 10 m3∕hm2). 3) Stock volume with the initial density of 4 995 plants per hectare (53. 94 m3∕hm2) was significantly higher than that with 3 330 plants per hectare ( 24. 89 m3∕hm2 ) . 4 ) Stock volume increased with increasing stand reserved density, that was as 975 plants per hectare (98. 68 m3∕hm2 ) <1 500 plants per hectare ( 122. 37 m3∕hm2 ) < 1 950 plants per hectare ( 128. 51 m3∕hm2 ) < 2 475 plants per hectare (137. 57 m3∕hm2) < 3 150 plants per hectare (138. 02 m3∕hm2). 5) Stock volumes with both mechanical ( 150. 70 m3∕hm2 ) and artificial land preparation ( 150. 68 m3∕hm2 ) were not significantly different ( P > 0. 01 ) , i. e. , mechanical was slightly higher than the artificial land preparation. 6 ) With the age increasing, the productivity of L. principis-rupprechtii in Saihanba was described as a single peak curve, the maximum for 26 -30 years stands with 5. 72 m3∕(hm2·a), the minimum for 11-15 years stands with 3. 22 m3∕( hm2·a) , and over 45 years stands with 3. 92 m3∕( hm2· a). 7) Regarding different regions, the productivities of L. principis-rupprechtii in Shanxi (6. 78-16. 57 m3∕( hm2·a ) ) , Hebei ( 6. 13 -9. 74 m3∕( hm2·a ) ) and Inner Mongolia ( 5. 20 -9. 90 m3∕( hm2·a ) ) were remarkably more than that in Shaanxi (2. 41 -4. 59 m3∕(hm2·a)) and Ningxia(1. 83 -3. 92 m3∕( hm2 ·a ) ) . This study identifies the response of stock volume to main factors and presents the productivity overview of L. principis-rupprechtii in Saihanba and differences of L. principis-rupprechtii productivity in different regions of northern and northwestern China, and provides effective references for the management of L. principis-rupprechtii forests.关键词
蓄积量/生产力/华北落叶松/经营管理因子Key words
stock volume/productivity/Larix principis-rupprechtii/management factor分类
农业科技引用本文复制引用
赵匡记,王利东,王立军,贾忠奎,马履一..华北落叶松蓄积量及生产力研究[J].北京林业大学学报,2015,(2):24-31,8.基金项目
中央高校基本科研业务费专项(TD2011-08)、林业公益性行业科研专项(201004021)。 （TD2011-08）
