| 珠江源头区不同地类人工恢复植被树种选择及生态效益研究 |
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| 引用本文： | 李贵祥,孟广涛,方向京,柴勇,和丽萍,张正海.珠江源头区不同地类人工恢复植被树种选择及生态效益研究[J].水土保持通报,2007,27(4):126-130. |
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| 作者姓名： | 李贵祥 孟广涛 方向京 柴勇 和丽萍 张正海 |
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| 作者单位： | 云南省林业科学院,云南,昆明,650204 |
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| 基金项目： | 国家西部大开发科技专项第三子专题项目;国家科技攻关计划;国家科技攻关计划 |
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| 摘 要： | 选择珠江源头区主要的6个造林树种,通过设置固定观测样地和观测设施,对不同地类人工恢复植被树种和其生态效益进行了4a对比分析。（1）树高生长以云南松为最慢,旱冬瓜最快,旱冬瓜、圆柏、藏柏、柳杉、川滇桤木树高分别是云南松的4.9,2.8,2.5,2.3,1.7倍。胸径生长依次为旱冬瓜〉圆柏〉藏柏〉柳杉〉川滇桤木〉云南松。从长势来看,旱冬瓜、圆柏、藏柏、柳杉、云南松为珠江源头区适宜的造林树种。（2）从6个树种的香浓—威纳指数来看,依次为阴坡退耕地〉荒草地〉退化林地〉阳坡耕地。均匀度指数则依次为阴坡退耕地〉阳坡耕地〉荒草地〉退化林地。（3）各地类的容重均减小,土壤毛管孔隙度比造林恢复前明显提高,表明土壤的结构得到了明显改善,耕地的板结状况也得到显著改善。（4）试验区的平均土壤侵蚀模数降为1087t/（km^2·a）,土壤侵蚀减少了38.48%,水土流失面积由188.27hm^2减少到104.83hm^2,水土流失面积减少44.32%。
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| 关 键 词： | 珠江源头区 不同地类 树种选择 生态效益 |
| 文章编号： | 1000-288X（2007）04-0126-05 |
| 收稿时间： | 2007/2/18 0:00:00 |
| 修稿时间： | 2007-02-18 |
Species Selection and Ecological Benefits of Revegetation on Different Types of Land in the Headstream Area of Pearl River |
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| LI Gui-xiang,MENG Guang-tao,FANG Xiang-jing,CHAI Yong,HE Li-ping and ZHANG Zheng-hai.Species Selection and Ecological Benefits of Revegetation on Different Types of Land in the Headstream Area of Pearl River[J].Bulletin of Soil and Water Conservation,2007,27(4):126-130. |
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| Authors: | LI Gui-xiang MENG Guang-tao FANG Xiang-jing CHAI Yong HE Li-ping and ZHANG Zheng-hai |
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| Institution: | Yunnan Academy of Forestry, Kunming, Yunnan 650204, China |
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| Abstract: | In order to conduct species comparison and eco-benefit analysis in revegetation, some fixed plots with different treatments of revegetation were set up on different types of land in the headstream area of Pearl River. The result of four-year study showed as follows (1) Among the six species studied, the tree height growth of Pinus yunnanensis was the lowest, and that of the Alnus neplanensis was the fastest. The tree height growths of Sabina chinensis, Cupressus torulosa, Cryptomeria japonica, Alnus ferdinandi-coburgii were 2.8, 2.5, 2.3 and 1.7 times of that of Pinus yunnanensis, respectively. The tested species, in terms of DBH, ranked in the descent order of Alnus neplanensis, Sabina chinensis, Cupressus torulosa, Cryptomeria japonica, Alnus ferdinandi-coburgii and Pinus yunnanensis. (2) Land types ranked in the descent Shannon Wiener index were in turn rehabilitated land at shady slope, grass land and bare land, and degraded forest land; land types ranked in the descent evenness index were in turn rehabilitated land at shady slope, arable land at sunny slope, grass land and bare land, and degraded forest land. (3) Soil bulk densities of all the land types decreased, and capillary porosities obviously increased compared with those in 2001, which implied that soil physical structure was significantly increased, and the condition of soil compaction was improved greatly. (4) The average soil erosion modulus for the experimental region decreased to 1 087 t/(km2·a), and it decreased by 38.48 %. The area of soil and water loss decreased from 188.27 hm2 to 104.83 hm2, decreasing by 44.32 %. |
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| Keywords: | headstream area of Pearl River different land types species selection ecological benefit |
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