柠条切割机液压机及柠条习性英文文献.pdf

ACTA ECOLOGICA SINICA Volume 27, Issue 3, March 2007 Online English edition of the Chinese language journal Cite this article as: Acta Ecologica Sinica, 2007, 27(3), 837−845. RESEARCH PAPER Hydraulic architecture of three Caragana species and its relationship with environmental factors in different habitats of the Inner Mongolian Plateau, China * Li Jing, Gao Yubao , Zheng Zhirong, Gao Zenglu College of Life Science, Nankai University, Tianjin 300071, China Abstract: Hydraulic architecture and its relationship with environmental factors were studied in three Caragana species, namely, Caragana microphylla Lam., C. davazamcii Sancz and C. korshinskii Kom, which were found in different habitats of the Inner Mongolian Plateau, China. The improved flushing method was used in situ on one-year-old twigs for comparing the hydraulic effi- ciency and the regulating abilities of these three species as well as their mechanisms of regulating water transport to cope with vari- able environments. The relationship between hydraulic architecture and air temperature followed a linear function with negative slope, whereas the relationships between these parameters with atmospheric humidity were positive. Comparing the hydraulic effi- ciency among the three seasons, a descending order was given as summerspringautumn. In the same season, the hydraulic effi- ciency of C. korshinskii was higher than that of C. davazamcii, which was in turn higher than that of C. microphylla. It can be con- cluded from the range of Ks and the slope of two linear functions that there were significant differences in the sensitivity of specific conductivity to environmental factors, both among species and among seasons, with a descending order as summerspringautumn