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[1]HE Cong,XIONG Wei,WANG Yan-hui,et al.The Water Use Efficiency of Larix principis-rupprechtii Plantation in the Northern Liupan Mountain[J].Research of Soil and Water Conservation,2011,18(05):112-118,123.

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The Water Use Efficiency of Larix principis-rupprechtii Plantation in the Northern Liupan Mountain

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 05 Page number: 112-118,123 Column: Public date: 2011-10-20

Title:: The Water Use Efficiency of Larix principis-rupprechtii Plantation in the Northern Liupan Mountain

Author(s):: HE Cong¹, XIONG Wei², WANG Yan-hui², CHENG Ji-min³, ZHAO Li-jun¹, YU Peng-tao², XU Li-hong², TONG Hong-qiang^2,4, WANG Yun-ni²; 1. College of Forestry, Guangxi University, Nanning 530005, China;
2. Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China;
3. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: Larix principis-rupprechtii; plantation; water use efficiency; productivity; evapotranspiration

CLC:: S715

DOI:: -

Abstract:: In order to quantitatively study the characteristics of water use of Larix principis-rupprechtii plantation, from May to October in 2010, tree radial growth, leaf area index, the increment in herb biomass, sap flow, interception of trees and so on were simultaneously measured and to be used to estimate the productivity, water consumption and water use efficiency (WUE) of L. principis-rupprechtii plantation, which was located in the Diediegou catchment in the northern Liupan Mountains, Ningxia Hui Autonomous Region. The results showed that the total productivity of the plantation was 11.76 t/hm². The productivity of canopy layer accounted for 75.2% of the total, while the productivity of herb layer accounted for 24.8%. In the growing season, the total productivity increased in the early- and mid- season and then decreased in the late season. Total evapotranspiration of the plantation was 433.9 mm, and the water consumption in tree canopy and herbaceous layer (including soil evaporation) accounts for 50.5% and 49.5% of the total evapotranspiration, respectively. And the evapotranspiration followed a temporal change pattern which was high in the early season and low in the late season. Throughout the growing season, WUE of L. principis-rupprechtii plantation was 2.71 g/kg, and WUE of tree layer was 4.04 g/kg, while WUE of herbaceous layer was 1.36 g/kg. The seasonal change of WUE in the whole plantation was similar to that of tree layer, suggesting that the tree layer has a strong influence on the determining WUE in the plantation.

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