黄土高原刺槐林细根生长与土壤水分的耦合关系

doi:10.11707/j.1001-7488.20101205

Scientia Silvae Sinicae ›› 2010, Vol. 46 ›› Issue (12): 30-35.doi: 10.11707/j.1001-7488.20101205

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Relationship between Fine Root Growth of Robinia pseudoacacia Plantation and the Soil Moisture in the Loess Plateau

Hu Xiaoning^1,2,3, Zhao Zhong¹, Yuan Zhifa², Wang Dihai¹, Guo Mancai², Li Jian¹

1. Key Laboratory of Environment and Ecology in Western China,Ministry of Education Northwest A&F University Yangling 712100;2. College of Science,Northwest A&F University Yangling 712100;3. Yangling Vocational & Technical College Yangling 712100

Received:2009-11-09 Revised:2010-10-12 Online:2010-12-25 Published:2010-12-25

Abstract

Abstract:

In this paper, fine roots of Robinia pseudoacacia and the soil moisture were investigated using an auger in Ansai County and Jingchuan County of the Loess Plateau region from June 2007 to April 2008. A similar variation trend was found in both the fine root surface area density of Robinia pseudoacacia and the soil moisture, with the soil depth. A coupled model, S=pe^{sin π/6 t-m}·W^ae^-bh, was established, describing the relationship between fine root surface area density and soil moisture, with soil depth and time. It is proved that the model could reflect the coupling relationship exactly. The fine root growth and soil moisture display annual cyclical changes in the model. The value of parameter a falls in between 0 and 1, which suggests the root growth of Robinia pseudoacacia just absorbs part of the soil moisture and could not cause soil desiccation in the investigated area.

Key words: the Loess Plateau, Robinia pseudoacacia, fine root growth, soil moisture, coupled model

CLC Number:

S711
O29

Hu Xiaoning;;Zhao Zhong;Yuan Zhifa;Wang Dihai;Guo Mancai;Li Jian. Relationship between Fine Root Growth of Robinia pseudoacacia Plantation and the Soil Moisture in the Loess Plateau[J]. Scientia Silvae Sinicae, 2010, 46(12): 30-35.

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Relationship between Fine Root Growth of Robinia pseudoacacia Plantation and the Soil Moisture in the Loess Plateau

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