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| 黄土丘陵区油松水土保持林生长过程与直径结构 | |
| 引用本文： | 张光灿,刘霞,周泽福,张淑勇,刘刚,陈建.黄土丘陵区油松水土保持林生长过程与直径结构[J].应用生态学报,2007,18(4):728-734. |
| 作者姓名： | 张光灿 刘霞 周泽福 张淑勇 刘刚 陈建 |
| 作者单位： | 1. 山东农业大学林学院,山东泰安,271018 2. 山东农业大学林学院,山东泰安,271018;中国林业科学研究院林业研究所国家林业局林木培育实验室,北京,100091 3. 中国林业科学研究院林业研究所国家林业局林木培育实验室,北京,100091 |
| 基金项目： | 国家科技攻关计划;山东省水利厅科技资助项目 |
| 摘 要： | 应用标准木树干解析法,研究了黄土丘陵沟壑区阴坡和阳坡两种21年生(密度为2 222株·hm-2)油松林分的生物量、林木生长过程和直径结构.结果表明：两种林分树高、林木直径和材积生长过程明显不同,阴坡林分的生物量、生长状况和直径结构优于阳坡林分.两种林分树高速生期出现在9～13年生之间,13年生以后,阴坡林分的生长量明显高于阳坡林分(21年生时,前者的连年生长量约在0.26 m·a-1,后者在0.1 m·a-1左右).两种林分的胸径生长量在13年生以后明显降低,但阴坡林分的降幅明显小于阳坡林分;17年生以后,前者的连年生长量明显大于后者(21年时,前者约在0.46 cm·a-1,后者只有0.27 cm·a-1左右).两种林分单株材积生长量在13年生之前差异较小,13年生之后，阴坡林分的连年生长量明显大于阳坡林分(21年生时,前者为0.0023 m3·a-1,后者只有0.0015 m3·a-1).两种林分直径分布都呈现顶峰左偏(林分密度偏大)的现象,但阴坡林分的偏度系数(SK为0.75)小于阳坡林分(SK为1.03)、而峰度系数(K为1.05)大于阳坡林分(K为0.94),说明阳坡林分密度偏大的程度大于阴坡林分. |
| 关 键 词： | 黄土丘陵区 油松林分 林木生长量 直径结构 |
| 文章编号： | 1001-9332(2007)04-0728-07 |
| 收稿时间： | 2006-5-23 |
| 修稿时间： | 2006-05-23 |
Growth process and diameter structure of Pinus tabulaeformis forest for soil and water conservation in Loess Plateau hilly regions |
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| ZHANG Guang-can,LIU Xia,ZHOU Ze-fu,ZHANG Shu-yong,LIU Gang,CHEN Jian.Growth process and diameter structure of Pinus tabulaeformis forest for soil and water conservation in Loess Plateau hilly regions[J].Chinese Journal of Applied Ecology,2007,18(4):728-734. | |
| Authors: | ZHANG Guang-can LIU Xia ZHOU Ze-fu ZHANG Shu-yong LIU Gang CHEN Jian |
| Affiliation: | 1 College of Forestry, Shandong Agricultural University, Taian 271018, Shandong, China; 2Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China |
| Abstract: | Through stem analysis of sample trees, the biomass, growth process, and diameter structure of two 21 years old Pinus tabulaeformis forests growing on the shady and sunny slopes in Loess Plateau hilly and gully regions were investigated. The results showed that there were distinct differences between these two forests in their tree height, diameter at breast height (DBH), and timber volume. The forest biomass, growth status, and diameter structure on shady slope were superior to those on sunny slope. The fast--growing period of tree height all appeared in the period of 9-13 years, and after 13 years, the annual increment of tree height was larger in shady slope forest than in sunny slope forest, with the increment in the 21st year being 0.26 and 0.1, respectively. The DBH growth of the two forests was declined greatly after 13 years, but the decrement was obviously less in shady slope forest than in sunny slope forest. After 17 years, the annual increment of DBH growth was larger in shady slope forest than in sunny slope forest, with the values being 0.46 cm·a-1 and 0.27 cm·a-1, respectively in the 21st year. Before 13 years, there was little difference in the increment of timber production between the two forests, but the increment after 13 years was larger in shady slope forest than in sunny slope forest,with the values of 0.0023 m3 and 0.0015 m3, respectively in the 21st year . The summit of DBH distribution curve was all partial to left, but the skewness of shady slope forest (SK=0.75) was lower than that of sunny slope forest (SK=1.03), and the kurtosis of shady slope forest (K=1.05) was higher than that of sunny slope forest (K=0.94), indicating that sunny slope forest had a larger stand density than shady slope forest. |
| Keywords: | Loess Plateau hilly region Pinus tabulaeformis forest forest increment diameter structure |
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