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黄土丘陵沟壑区退耕地土壤种子库对植被恢复的影响
引用本文:白文娟,焦菊英,张振国.黄土丘陵沟壑区退耕地土壤种子库对植被恢复的影响[J].北京林业大学学报,2008,30(4):65-71.
作者姓名:白文娟  焦菊英  张振国
作者单位:中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室;中国科学院研究生院;中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室;西北农林科技大学水土保持研究所
基金项目:国家自然科学基金,西北农林科技大学校科研和教改项目,西北农林科技大学校科研和校改项目
摘    要:为了探讨土壤种子库对植被恢复的影响,该文在野外调查和室内试验的基础上,采用典范变量分析,研究了黄土丘陵沟壑区退耕地土壤种子库密度、土壤水分和养分、地形因子以及退耕年限对植物群落变化的影响,量化了土壤种子库对植被恢复的贡献。结果表明:影响植物群落变化的因子有土壤水分、速效磷、土壤种子库和坡向;仅用土壤种子库只可解释植物群落变化的32.1%;由于退耕地土壤种子库的优势种主要为猪毛蒿,其植被恢复潜力与速度比较小。黄土丘陵沟壑区退耕地植被恢复需要适度的人为干预,有必要适当引进一些演替后期物种,如白羊草、铁杆蒿、长芒草等物种,以缩短演替时间,加速退耕地植被恢复进程,促进黄土丘陵沟壑区水土流失的防治。 

关 键 词:土壤种子库  立地环境  植被恢复  典范变量分析  黄土丘陵沟壑区
收稿时间:1900-01-01

Effects of soil seed bank on vegetation restoration in abandoned croplands on the hilly-gullied Loess Plateau
BAI Wen-juan,JIAO Ju-ying,ZHANG Zhen-guo.Effects of soil seed bank on vegetation restoration in abandoned croplands on the hilly-gullied Loess Plateau[J].Journal of Beijing Forestry University,2008,30(4):65-71.
Authors:BAI Wen-juan  JIAO Ju-ying  ZHANG Zhen-guo
Institution:1 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources,Yangling, Shaanxi Province, 712100, P. R. China; 2 Graduate University of Chinese Academy of Sciences, Beijing, 100049, P. R. China; 3 Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi Province, 712100, P. R. China.
Abstract:In order to identify the potential significance of soil seed bank for vegetation restoration,the authors studied the influences of density of soil seed bank, soil water content,soil nutrient,topography and time on vegetation community in abandoned croplands on the hilly-gullied Loess Plateau and quantified the contribution of the soil seed bank to vegetation restoration through field survey,lab experiments and canonical variate analysis.The results show that the most important variables were soil water cont...
Keywords:soil seed bank  site environment  vegetation restoration  canonical variate analysis  hilly-gullied Loess Plateau  
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