草业科学2012，Vol.29Issue(8)：1256-1261,6.
气候变化对不同海拔高山嵩草物候期的影响
Impacts of climate change on Kobresia pygmaea phenophase at different altitude regions in Qinghai Plateau
摘要
Abstract
Impacts of climate change on phenophase of Kobresia pygmaea at high （4 175. 0 m） and low （3 500.0 m） altitude regions in the Qinghai Plateau were studied by analyzing the observation data obtained from Qumalai and Henan meteorological stations from 1989 to 2010. The results showed that during the past 22 years the air temperature had an increasing trend at both high and low altitudes, the warming amplitude of mean minimum temperature was larger at high altitude than that at low altitude, while the warming amplitude of mean maximum temperature was larger at low altitude than that at the high altitude. The air temperature change in growth season （April to September） showed a same trend at two meteoro- logical stations. There was a significant correlation between air temperature of the growth season and an- nual air temperature. It was found that days of green stage, growth period and withering period of K. pygmaea at two meteorological stations showed interannual fluctuations, the fluctuations at high altitude were bigger than those at low altitude. The first day of green stage had a delaying tendency with increasing altitude, 3.3 d per 100 m. In contrast, the growth period had a shortening tendency with increasing alti- tude, 2.5 d per 100 m. At high altitude regions, average phenophase of K. pygmaea was advanced 6--25 d, and growth period was prolonged 3 d. At low altitude regions, withering period was advanced 1 d, while other phenophase was delayed 1- 9 d, and growth period was prolonged 6 d. The growth of K. pygmaea at high altitude was influenced easier than that at low altitude by climate change. Its habitat was more fragile at the high altitude region.关键词
生长期/返青期/曲麻莱/河南Key words
climate change/different altitude/Kobresia pygmaea/phenophase分类
农业科技引用本文复制引用
王力,李凤霞,周万福,李晓东..气候变化对不同海拔高山嵩草物候期的影响[J].草业科学,2012,29(8):1256-1261,6.基金项目
科技支撑计划 （）
自然基金 （）
青海省气象局项目“自动土壤水分观测数据订正模型研究” （）
