摘要
沙坡头地处腾格里沙漠的东南缘,属于宁夏回族自治区中卫县。该地区自然条件严酷,沙丘起伏大,沙层深厚,格状沙丘由西北向东南倾斜且呈阶梯状分布。地下水位深达几十甚至10Om以上,有机质、碳酸钙和速效性养分含量都很低,pH值7.14一7.60。
This paper applies the Markov process to the studies of artificial vegetation dynamics inShapotou area.The results show that the present state of artificial vegetations in Shapotouarea is not a stable one,but an embryo stage for future vegetational changes.The futurechanges of artificial vegetations are predicted to be the “fluctuations”,which will last about100 years.The spectral system analysis indicate a close similarity for shrub and semi-shrub,which have the same pre-and post-colonization grassland state.Entropy analysis indicatethat grassland factor is the most indefinitive.
出处
《生态学杂志》
CAS
CSCD
北大核心
1990年第4期53-56,共4页
Chinese Journal of Ecology
关键词
人工植被
演替
覆盖度
沙坡头
artificial vegetation
succession
coverage
Markov process
Shapotou
