摘要
研究了不同放牧强度对羊草草地的影响,结果表明,过牧条件下,群落地上、地下生物量分别比轻牧阶段下降了67.96和75.00%,羊草种群根茎分蘖数和种子产量下降1.0和3.3%.极牧条件下,土壤有机质和水分含量分别下降到轻牧阶段的21.1和66.5%,而碱化度和全盐量却分别增加了1倍和8倍.
Studies on the effect of different grazing intensities on A. chinense grasslands show that in comparing with light grazing, above-and underground biomass of the community is decreased respectively by 67. 96 and 75. 00%, and tillers number of root stocks and seed production of A. chinease are decreased by 1. 0 and 33X, under overgrazing condition.Under extreme grazing condition, soil organic matter and water content are decreased by 21. 1 and 66. 5%, and the alkalinity and total salt are increased by one and eight times,respectively.
出处
《应用生态学报》
CAS
CSCD
1995年第3期277-281,共5页
Chinese Journal of Applied Ecology
基金
国家自然科学基金
关键词
放牧演替
羊草草地
松嫩草原
Grazing succession, Aneurolepidium chinense grassland, Songnen grassland.