TY - JOUR
T1 - Effects of soil water regimes on the growth of Quercus mongolica seedlings in Changbai Mountains
AU - Wang, Miao
AU - Li, Qiurong
AU - Hao, Zhanqing
AU - Dong, Baili
PY - 2004/10
Y1 - 2004/10
N2 - This paper studied the response of the seedlings of Quercus mongolica, one of the dominant tree species in Changbai Mountains, to the artificially controlled three soil water gradients, including their morphology, biomass and photosynthetic characteristics. The results indicated that various water regimes significantly affected the biomass and its distribution pattern in the leaves, branches and roots, as well as the leal gas exchange. Under soil water stress, the crown structure changed, and the tree height, groundline diameter, single leaf area, and above-ground and belowground biomass were inhibited. As soil water content decreased, the ratio of belowground and above-ground biomass dry weight significantly increased. Water stress had a negative effect on net photosynthetic rate, CO2 use efficiency and carbon use efficiency. The responses of stomatal conductance, transpiration rate and water use efficiency to water stress were complicated. Only at low soil water content, the stomatal conductance and transpiration rate significantly decreased, while water use efficiency increased. It was demonstrated that Quercus mongolica was the tree species with variable resistance to drought, and the resistance could be improved by long-term soil water stress.
AB - This paper studied the response of the seedlings of Quercus mongolica, one of the dominant tree species in Changbai Mountains, to the artificially controlled three soil water gradients, including their morphology, biomass and photosynthetic characteristics. The results indicated that various water regimes significantly affected the biomass and its distribution pattern in the leaves, branches and roots, as well as the leal gas exchange. Under soil water stress, the crown structure changed, and the tree height, groundline diameter, single leaf area, and above-ground and belowground biomass were inhibited. As soil water content decreased, the ratio of belowground and above-ground biomass dry weight significantly increased. Water stress had a negative effect on net photosynthetic rate, CO2 use efficiency and carbon use efficiency. The responses of stomatal conductance, transpiration rate and water use efficiency to water stress were complicated. Only at low soil water content, the stomatal conductance and transpiration rate significantly decreased, while water use efficiency increased. It was demonstrated that Quercus mongolica was the tree species with variable resistance to drought, and the resistance could be improved by long-term soil water stress.
KW - Gas exchange
KW - Quercus mongolica
KW - Resource use efficiency
KW - Soil water regime
UR - http://www.scopus.com/inward/record.url?scp=10444275546&partnerID=8YFLogxK
M3 - 文章
C2 - 15624805
AN - SCOPUS:10444275546
SN - 1001-9332
VL - 15
SP - 1765
EP - 1770
JO - Ying yong sheng tai xue bao = The journal of applied ecology
JF - Ying yong sheng tai xue bao = The journal of applied ecology
IS - 10
ER -