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中国沙漠 ›› 2001, Vol. 21 ›› Issue (3): 281-285.

• 实验研究 • 上一篇    下一篇

干旱区植物水分生态位适宜度的数学模型及其过程数值模拟试验研究

李自珍1,2, 施维林1,3, 唐海萍1, 王新平3   

  1. 1. 兰州大学干旱农业生态国家重点实验室;甘肃兰州 730000;
    2. 兰州大学数学系, 甘肃兰州 730000;
    3. 中国科学院寒区旱区环境与工程研究所沙坡头沙漠试验研究站, 甘肃兰州 730000
  • 收稿日期:2000-11-28 修回日期:2001-02-13 出版日期:2001-09-20 发布日期:2001-09-20
  • 通讯作者: 施维林
  • 作者简介:李自珍(1948-),男(汉族),河南许昌人,教授,主要从事应用数学、数学生态学方面的研究。
  • 基金资助:
    中国科学院沙坡头沙漠试验研究站基金项目;国家自然科学基金项目(39970135和30070139)资助

Studies on Numerical Simulation of Moisture Niche-fitness Procedure of Arid Plants

LI Zi-zhen1,2, SHI Wei-lin1,3, TANG Hai-ping1, WANG Xin-ping3   

  1. 1. The State Key Laboratory of Arid Agroecology, Lanzhou University, Lanzhou 730 000, China;
    2. Department of Mathmatics, Lanzhou University, Lanzhou 730000, Chin a;
    3. Shapotou Desert Research & Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China
  • Received:2000-11-28 Revised:2001-02-13 Online:2001-09-20 Published:2001-09-20

摘要: 在干旱地区水分是影响植物生长的限制因子。文章分析了沙地植物的水分利用状况,通过扩展经典生态位理论的内涵,用数学抽象方法定义植物水分生态位适宜度为其水分最适生态位点与现实生态位点的贴近度,建立了响应数学模型及数值模拟方法,依据试验观测结果进行了植物水分生态位适宜度过程的计算分析,所获结果具有较高的精度。文中有关数值模拟试验研究结果为干旱区无灌溉条件下人工植被的营建提供了新的理论模式和定量依据。

关键词: 植物, 生态位适宜度, 模型, 数值模拟试验

Abstract: Water is the main restricting factor that influences the growth of plants in arid area. We focused on moisture utility of plants in sandy region, expended the definition of classical niche theory and defined the niche fitness degree of plant moisture as the closeness between the optimal niche and the real niche by using abstract mathematics. Furthermore, we established the mathematical model and the simulating method corresponding. The relative computation analysis and numerical simulation were completed on the basis of field experiment, and the result of simulation is agreement with the practical observation result. The relative results of numerical simulation provide new theoretical model and quantitative bas is for artificial planting in arid regions which without irrigation.

Key words: plant, niche fitness degree, model, numerical simulating experiment

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