羊草草原弃耕地恢复性演替过程的数学模型和计算机模拟  

A MATHEMATICAL MODEL AND A COMPUTER SIMULATION OF SUCCESSION PROCESS OF LEYMUS CHINENSIS MICROCOMMUNITIES IN ABANDONED FIELD

作　　者：刘家冈[1] 张学培[1] 刘宁[1] 张立[1] 王本楠[2] 

机构地区：[1]北京林业大学,北京100083 [2]中国科学院环境与生态研究中心,北京100085

出　　处：《林业科学》2002年第3期63-66,共4页Scientia Silvae Sinicae

摘　　要：本文在王振堂 (1985 )工作的基础上 ,把羊草的重新侵入看作是一个逐步的过程。以此为基础提出了它的数学模型 ,模型的解析形式 ,并进行了计算机模拟。结果与实验数据十分相符。A mathematical model and a computer simulation of succession process of Leymus chinensis microcommunities in abandoned field were presented. The results accord with data very well. The mathematical model isY(t)=1-e -πV 2N3t 3 Where Y(t) is area occupied by microcommunities of Leymus chinensis, V the expansion speed of Leymus chinensis microcommunities, N the number of seed which invade the abandoned field in unit time and unit area.

关 键 词：退耕还草 羊草草原 弃耕地 恢复性演替过程 数学模型 计算机模拟 

分 类 号：S812[农业科学—草业科学]