| 坡耕地退耕还林后的植被恢复 |
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| 引用本文： | 万雪琴,胡庭兴,张健,李贤伟,宫渊波.坡耕地退耕还林后的植被恢复[J].林业科学,2005,41(2):191-194. |
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| 作者姓名： | 万雪琴 胡庭兴 张健 李贤伟 宫渊波 |
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| 作者单位： | 四川农业大学生态林业工程省级重点实验室,雅安,625014 |
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| 基金项目： | 国家教育部“九五”资助项目，国家科技部“十五”资助项目 |
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| 摘 要： | 生态公益林建设是坡耕地恢复森林植被最重要的模式 ,但对退耕还林后的植被恢复特点和规律的研究却很少报道。本文选择在四川省退耕还林工程中普遍发展的桤木生态公益林为研究对象 ,对其植被恢复特点和规律进行了探讨。1 试验地概况选择坡耕地退耕还林后形成的桤木 (Alnuscremastogyne)生态林和弃耕 1年形成的杂草群落为研究对象。试验地位于四川西缘山地区的天全县境内 ,东经 10 2°4 5′ ,北纬 30°0 3′ ,海拔 80 0m ,坡度 2 6° ,坡向西北 ,坡位中部 ,母质为砂岩风化物 ,土壤类型为紫色土 ,属亚热带季风湿润气候区 ,年平均降雨量 1735 …
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| 关 键 词： | 坡耕地 退耕还林 植被恢复 生活型 生物多样性 群落发展 |
| 文章编号： | 1001-7488(2005)02-0191-04 |
| 修稿时间： | 2003年6月17日 |
Vegetation Restoration of Hillside Fields after Conversion of Farmland to Forests |
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| Wan Xueqin,Hu Tingxing,Zhang Jian,Li Xianwei,Gong Yuanbo.Vegetation Restoration of Hillside Fields after Conversion of Farmland to Forests[J].Scientia Silvae Sinicae,2005,41(2):191-194. |
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| Authors: | Wan Xueqin Hu Tingxing Zhang Jian Li Xianwei Gong Yuanbo |
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| Abstract: | Public welfare forest is the most important model of vegetation restoration in the Conversion of farmland to forests in Sichuan Province. It can well represent and reflect the characteristics and laws of vegetation restoration in hillside fields. Therefore an Alnus cremastogyne forest community developed via converting hillside fields to forest, was investigated by contrast with a weed community on abandoned hillside fields. The results indicated that: 1) In Sichuan Basin and surrounding regions of it, vegetations restored so rapid that the average DBH (diameter at breast height), tree height of A.cremastogyne tree crown density, ground vegetation coverage respectively reached 5.2 cm, 6.1 m, 0.7 and 100 percent for 3 years and after converting hillside fields to forest. 2) With vegetation restoring, community gradually developed mosaic spatial pattern and vertical stratification, simultaneously distribution of plant population changed from regular to clumped, and spatial heterogeneity of community increased. 3) Community biodiversity remarkably increased in the process of vegetation restoration in hillside fields. During the period, species richness of both commnuities changed from 20 to 39, Shannon-Wiener diversity index was 4.205 and 5.021 respectively, while Pielou equitability index dropped little. 4) Plant species frequently and dramatically altered, which mainly showed that therophytes declined rapidly from 16 to 10, while perennial ones dramatically increased from 2 to 26, and 8 of them are phanerophytes. 5) The pathway of community development approximately was from annual herbs to shrubs perennial herbs to trees shrubs and herbs perennial herbs, finally to natural mixed forests, such driving force was mainly from interspecific competition. |
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| Keywords: | hillside fields conversion of farmland to forests vegetation restoration life form biodiversity community development |
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