| 黄土丘陵沟壑区植被自然恢复过程中土壤种子库特征 |
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| 引用本文： | 袁宝妮,李登武,李景侠,王冬梅,薛玲,刘杰.黄土丘陵沟壑区植被自然恢复过程中土壤种子库特征[J].干旱地区农业研究,2009,27(6):215-222. |
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| 作者姓名： | 袁宝妮 李登武 李景侠 王冬梅 薛玲 刘杰 |
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| 作者单位： | 西北农林科技大学林学院,陕西,杨凌,712100 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 采用野外调查取样和室内实验相结合的方法,研究了黄土丘陵沟壑区植被自然恢复过程中土壤种子库的物种组成、密度、物种多样性以及相似性特征.结果表明:阴、阳坡10个样地中,共萌发了55种2203株幼苗,隶属于23科48属;总密度达到5 505±625.537粒/m2,且0～5 cm土层远远大于5～10 cm土层的土壤种子库密度,约是其4.6倍;丰富度、多样性、均匀度指数均未与恢复年限达到显著相关水平,但生态优势度随恢复年限的增加呈上升趋势,且阳坡上升的趋势比阴坡明显;组成成分相似性系数变化范围为0.0952～0.7143,恢复年限相距越大,其相似性越小,说明植被恢复演替的过程也是土壤种子库空间异质性加大的过程.
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| 关 键 词： | 土壤种子库 植被恢复 黄土丘陵沟壑区 |
Studies on characteristics of soil seed banks in natural vegetation restoration of the Loess hilly gully regions |
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| YUAN Baoni,LI Dengwu,LI Jingxi,WANG Dongmei,XUE Ling,LIU Jie.Studies on characteristics of soil seed banks in natural vegetation restoration of the Loess hilly gully regions[J].Agricultural Research in the Arid Areas,2009,27(6):215-222. |
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| Authors: | YUAN Baoni LI Dengwu LI Jingxi WANG Dongmei XUE Ling LIU Jie |
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| Institution: | YUAN Bao-ni,LI Deng-wu,LI Jing-xia,WANG Dong-mei,XUE Ling,LIU Jie(College of Forestry,Northwest A&F University,Yangling,Shaanxi 712100,China) |
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| Abstract: | Field survey and laboratory experiment were conducted to study the characteristics of soil seed bank, such as species composition, density, diversity and similarity in the natural vegetation restoration of loess hilly gully re-gions . The results showed that 2203 seedlings of 55 species, which belonged to 23 families and 48 genera, germinated in the 10 plots. The total seed density reached 5 505 ± 625.537 grains/m~2, approximately 4.6 times bigger in 0 ～ 5 cm than in 5 ～ 10 cm soil layer. The richness, diversity and evenness of soil seed bank did not achieve the remarkable relat-ed level with the restored age, but the ecological dominance increased while recovered years increased, and it took a more significant increasing trend in sunny slope than in shady slope. The similarity coefficients of soil seed bank composition ranged from 0.0952 to 0.7143, and the similarity coefficients got smaller with the increase of recovered years, which showed hat the vegetation succession of the abandoned cropland was basically an enlarging process of spatial heterogeneity. |
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| Keywords: | soil seed bank vegetation restoration Loess hilly gully region |
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