中国水土保持科学2011，Vol.9Issue(5)：60-66,7.
太行山石灰岩区侧柏人工林蒸腾耗水及其与环境因子的关系
Transpiration of Platycladus orientalis plantation and its relationship withenvironmental factors in limestone area, Taihang Mountains
摘要
Abstract
In order to ascertain the transpiration variation of oriental arborvitae (Platycladus orientalis (L. ) Franco) plantation and its relationship with environmental factors in limestone area of Taihang Mountains, flow-based transpiration was measured simultaneously with environmental variables, including soil volumetric water content ( Wv) , photosynthetically active radiation ( Par ) , relative humidity ( Hr) , air temperature ( ta ) , wind speed ( vw ) and rainfall ( R ). Transpiration rate showed unimodal diurnal variations with diurnal mean value 0.025 -0. 041 mm/h and maximum value 0. 078 -0. 150 mm/h over the experiment period. Diurnal transpiration rate was significantly affected by Hr, ta, Par and Wv (P <0. 05) .which could give 87. 7% variation together. The descending order of correlation degree was Par, Hr, ta and Wv. Accumulative and mean daily transpiration of stand mean was 0. 2 - 1. 6 mm and 0.7 mm respectively. They were significantly affected by Hr, ta, Par and Wv, which could give 64. 3% seasonal variation together. The descending order of correlation degree was Par, Hr, Wv and ta over the experiment period. Par had the most significant effects on daily transpiration, followed by ta in most of period intervals. Hr and Wv had significant effects on daily transpiration only during the wetting and drying alternation intervals. Accumulative and mean monthly transpiration were 18. 3 -28. 8 mm and 21. 8 mmrespectively. The seasonal variation of accumulative monthly transpiration occurred unimodal pattern withpeak value observed in June. Accumulative monthly transpiration only greatly correlated with Par ( P <0. 05). The seasonal ( 1 April to 30 September) total transpiration amounts to 130. 5 mm, representing42. 5% of rainfall over the period.关键词
侧柏林/环境因子/林分蒸腾量/石灰岩区Key words
Platycladus orientalis plantation/environmental factors/stand level transpiration/lime stone area引用本文复制引用
李永生..太行山石灰岩区侧柏人工林蒸腾耗水及其与环境因子的关系[J].中国水土保持科学,2011,9(5):60-66,7.基金项目
“十一五”国家科技支撑计划“石灰岩中山区雨水资源高效利用与固土蓄水技术试验示范”(2006BAD03A 1103) （2006BAD03A 1103）
