干旱地区农业研究2009，Vol.27Issue(6)：215-222,8.
黄土丘陵沟壑区植被自然恢复过程中土壤种子库特征
Studies on characteristics of soil seed banks in natural vegetation restoration of the Loess hilly gully regions
摘要
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.关键词
土壤种子库/植被恢复/黄土丘陵沟壑区Key words
soil seed bank/vegetation restoration/Loess hilly gully region分类
农业科技引用本文复制引用
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):215-222,8.基金项目
国家自然科学基金资助项目(30671672) （30671672）
