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[1]ZUO Sheng-peng,WANG Hui-mei,LI Feng-ming,et al.Comparison of Physiological Ecology of Four Typical Leguminous Forages Communities in Semi-arid Loess Plateau of China[J].Research of Soil and Water Conservation,2010,17(01):167-173.

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Comparison of Physiological Ecology of Four Typical Leguminous Forages Communities in Semi-arid Loess Plateau of China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 01 Page number: 167-173 Column: Public date: 2010-02-20

Title:: Comparison of Physiological Ecology of Four Typical Leguminous Forages Communities in Semi-arid Loess Plateau of China

Author(s):: ZUO Sheng-peng^1,2, WANG Hui-mei^1,2, LI Feng-ming², SHAN Lun²; 1. College of Environmental Science and Engineering, Anhui Normal University, Wuhu, Anhui, 241000, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shanxi, 712100, China

Keywords:: Leguminous forage; population ecology; drought press; vegetation productivity; Source-Sink Modulation; growth strategy

CLC:: S541.01

DOI:: -

Abstract:: In semi-arid Loess Plateau of Northwestern China,the improvement of population ecology is critical for vegetation construction and ecological restoration related to sustainable development.In the present study,with artificial investigation of vegetation parameters,ecological difference for four leguminous forages population is compared and analyzed.Meanwhile,it also discusses possible coupling mechanism between herbage productivity and population ecology based on network relationship analysis.It is discovered that four materials show similar distribution law of soil water,declining vertically with soil depth,even with significant content difference of soil moisture.From the opinion of net primary productivity,two types are divided as high productivity in Medicago sativa and Astragalus adsurgens,low for Onobrychis viciaefolia and Lespedeza dahurica.The separation closely relates to water utilization property of interspecific specificity as well as nitrogen transition of N deposition and fixing.M.sativa displayed high aboveground biomass,which combines markedly with giant roots imbibing soil water even from deep layer.This reflects that the coincidence between canopy growth and soil circumstance will significantly lead to response of genetic difference to any stress like drought.Therefore,it is feasible to enhance drought resistance for adjusting root and canopy relationship from the theory view.With the relationship analysis,it is deduced that vegetation productivity,roots biomass and soil environment such as water and physical layer is correlated as a net system.In soil depth as 90-100 cm for roots distribution districts,it is observed that soil moisture show position relation to the ratio of root to canopy,which is assumed that it will be the interface about soil water storage and deficit.Based on the above description,M.sativa is adaptive to be popular in the loess Plateau from living strategy among four tested species.It results from its better benefit of soil and water conservation,but also with higher productivity.So its wide propagation will be available for ecological restoration and sustainable development of vegetation resources on the Loess Plateau.

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