摘要
2004年对金沙江干热河谷典型退化山地草地进行了封禁,并在2005和2006年对封禁草地土壤种子库、植被群落组成、植被密度及土壤种子库种群密度和植被种群密度的相关性等进行了分析。结果表明:土壤种子库密度与封禁当年植被密度呈极显著正相关(P<0.01),回归方程呈二次曲线;土壤种子库单一种群与其植被种群的相关分析表明,扭黄茅、升马唐、丝叶球柱草、两歧飘拂草种群的土壤种子库与植被密度呈极显著正相关(P<0.01),双穗雀稗、白顶早熟禾、洱源荩草、酢浆草、鬼针草、叶下珠种群的土壤种子库与植被密度呈极显著负相关(P<0.01)。
In 2005 and 2006, investigations were made on the soil seed bank, plant community composition, and vegetation density on a typical degraded grassland in Jinsha River dry-hot valley, which was enclosed in 2004, with the relations of soil seed bank with vegetations analyzed. The results showed that the density of soil seed bank was significantly positively correlated with the density of vegetations in the year of enclosure （P 〈 0.01 ） , and the regression equation could be well expressed by quadratic curve. The soil seed bank under Heteropogon conwrtus, Digitaria ciliaris, Bulbostylis densa, and Fimbristylis dichotoma populations had significant positive correlations with the vegetation density of the populations （ P 〈 0. 01 ）, while that under Pasdpalum paspalodes , Poa acroleuca , Arthraxon breviaristatus , Oxalis corniculata , Bidens pilosa , and Phyllanthus urinaria populations were not.
出处
《生态学杂志》
CAS
CSCD
北大核心
2008年第11期1908-1912,共5页
Chinese Journal of Ecology
基金
云南省自然科学基金重点资助项目(2003C0008Z)
关键词
干热河谷
封禁草地
土壤种子库
dry-hot valley
enclosure grassland
soil seed bank.
