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[1]CHEN Xiao-yan,GU Zhong-hou,TIAN You-liang,et al.Stem Sap Flow Characteristics and the Relation to Meteorological Factors of Pinus tabulaeformis Carr. Plantation of Daqing Mountain[J].Research of Soil and Water Conservation,2009,16(06):97-101.

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Stem Sap Flow Characteristics and the Relation to Meteorological Factors of Pinus tabulaeformis Carr. Plantation of Daqing Mountain

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 16 Number of periods: 2009 06 Page number: 97-101 Column: Public date: 2009-12-20

Title:: Stem Sap Flow Characteristics and the Relation to Meteorological Factors of Pinus tabulaeformis Carr. Plantation of Daqing Mountain

Author(s):: CHEN Xiao-yan¹, GU Zhong-hou², TIAN You-liang¹, HE Yan-hong¹, GUO Lian-sheng¹; 1. College of Forestry, Inner Mongolia Agricultural University, Hohhot 010019, China;
2. Erdos City Forest Resources Administration Management Station, Dongsheng, Inner Mogolia 017000, China

Keywords:: Pinus tabulaeformis Carr.; Stem sap flow; Daqing mountain; meteorological factors

CLC:: S715

DOI:: -

Abstract:: The stem sap flow characteristics and the relation with meteorological factors of 30 a Pinus tabulaeformis were researched by using TDP method in Kuisu forest farms of Daqing Mountain. The results indicated: (1) the diurnal variation of sap flow displayed a typical wave form characteristic. The sap flow flux in daytime was higher than that in nighttime. (2) Average sap flow flux of individual plant in September was higher than that in June. (3) The sap flow velocity variation in sun side at different radial depths of Pinus tabulaeformis stem had similar trend. And average sap flow velocity from exterior to interior showed the rule which was lower-higher-lower. (4) The results of correlation analysis of sap flow flux and the main meteorological factors indicated that different stand densities had different rules. For the lower density stand, there was a significant positive correlation between sap flow flux and the solar radiation. And there was a significant negative correlation between sap flow flux and soil temperature at 20 cm depth. The sap flow flux didn’t have obviously interrelated with air temperature and relative humidity. While for the higher density stand, in arid June the solar radiation wasn’t the dominant influence factor. In September there was a significant positive correlation between sap flow flux and the solar radiation, and a significant negative correlation between sap flow flux and soil temperature at 20 cm depth.

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