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[1]DUAN Yu-xi,HE Kong-ning,ZHU Yan-yan,et al.Responses of Photosynthesis and Transpiration of Sand Willow to Light in Different Soil Moisture in Sandy Land of Yanchi Country[J].Research of Soil and Water Conservation,2008,15(03):200-203.

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Responses of Photosynthesis and Transpiration of Sand Willow to Light in Different Soil Moisture in Sandy Land of Yanchi Country

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 15 Number of periods: 2008 03 Page number: 200-203 Column: Public date: 2008-06-20

Title:: Responses of Photosynthesis and Transpiration of Sand Willow to Light in Different Soil Moisture in Sandy Land of Yanchi Country

Author(s):: DUAN Yu-xi^1,2, HE Kong-ning¹, ZHU Yan-yan¹, LU Xin-jian¹, ZHANG Jin-hu¹, SUN Yue-qiang¹; 1. College of Soil and Water Conservation in Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China;
2. Inner Mongolia Academy of Forestry Sciences, Huhhot 010010, China

Keywords:: Sand Willow; net photosynthesis rate; transpiration rate; water use efficiency; solar energy utilization efficiency

CLC:: S152.7

DOI:: -

Abstract:: The characteristics of responses of three-year-old sand willow leaves to light were measured under different soil moisture content,with a Li-6400 portable photosynthesis system.The results show that,within the range of 0～2 000 μmol/(m²·s) of PAR,1340,1520,1550 and 1 633 μmol/(m²·s) are the light saturation point (LSP) under a little different water content respectively;Tr is rising accordingly as the PAR increasingly enhanced;8.7,9.1,9.47 and 19.52 μmol/(m²·s) of that are the highest Pn point respectively;for keeping higher net photosynthesis rate,that is,as Pn reaches 80% of the highest point,the lowest PAR is over 500 μmol/(m²·s);for keeping higher water use efficiency (WUE),the amount of PAR is between 600～1 500 μmol/(m²·s).In the light of the average Pn and the average WUE,the SWC in which both the Solar Energy Utilization Efficiency and the Water Use Efficiency are all better is about 8%.

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