黄土高原刺槐细根生长模型的建立  

A Model for Fine Root Growth of Robinia pseudoacacia in the Loess Plateau

作　　者：胡小宁[1,2] 赵忠[1] 袁志发[2] 李剑[1] 郭满才[2] 王迪海[1] 

机构地区：[1]西北农林科技大学西部环境与生态教育部重点实验室,杨凌712100 [2]西北农林科技大学理学院,杨凌712100

出　　处：《林业科学》2010年第4期126-132,共7页Scientia Silvae Sinicae

基　　金：国家自然科学基金项目(30671673)

摘　　要：林木根系垂直分布研究对于揭示根系生长对土壤水分的影响具有重要意义。通过数学模型描述根系的分布特征是研究根系在土壤中分布格局的有效方式。国内外虽然在这方面取得了许多研究结果,但大部分都是指数函数、幂函数、The vertical distribution changes of Robinia pseudoacacia fine roots were investigated in Ansai County of Shaanxi Province （ a semi-arid region） and Jingchuan County of Gansu Province （ a sub-humid region） on the Loess Plateau by using root -auger method from June 2007 to April 2008. The collected data verified that the model of S = hB（M ＋ Nh ＋ Uh2 ＋ Vh3） was able to well fit the fine root vertical distribution （where h = depth of soil,S = total surface area of the fine root in the h）. By determining the value of parameter B and establishing functions of M,N,U,V on parameter t （month）,a dynamic model was established for describing changes of the fine root growth with h and t. It was validated the model could be used to accurately calculate the total surface area of the fine root in different water ecological zones of the Loess Plateau,would have a high application value.

关 键 词：刺槐 细根表面积密度 生长模型 黄土高原 

分 类 号：S711[农业科学—林学]