【摘要】 本文利用盖度指标,通过对古兰太盐湖封沙育草区封育后四年来白刺(Nitrariatangotorum Bor)种群盖度变化的研究,应用Logistic方程的基本原理建立了白刺种群盖度增长模型N=40.0/(1+exp(2.0872-2.0872t)拟合结果表明该封育区内白刺种群盖度将趋近于40.0%,达到固定沙地的水平,并且提出在生境相似的地区进行封育时以盖度在20%左右见效最快。更多还原

【Abstract】 This paper deals with the change of cover—degree of Nitraria Tangotoru population in Ji Lan Tai salt lake where it has been closed off to cultivate grass for 4 years and establishes the increasing model of cover-degree with Logistic equation N=40.0/(1+exp(2.0872-2.0872t) The result showed that the cover-degree of Nitraria Tangotorum population would approach 40% and fulfil the requirements of fixing sand in this district and that the protecting effect would be the best in those areas where the ecological environment is similar to that of the Ji Lan Tai salt lake when the cover-degree of Xitraria Tangotorum population is about 20%.更多还原