生态学杂志2011，Vol.30Issue(12)：2672-2678,7.
降雨量变化对樟子松生理生态特性的影响
Effects of precipitation change on eco-physiological characteristics of Mongolian pine
摘要
Abstract
Global climate change has altered the atmospheric circulation and hydrologic cycle, and led to the changes of regional precipitation patterns, giving effects on the material cycling and energy flow of terrestrial ecosystems, and accordingly, on the eco-physiological response of plant communities to precipitation change. In this paper, a Mongolian pine (Pinus sylvestris var. Mon-golica ) plantation in Horqin Sandy Land was selected as test object to study its eco-physiological responses to potential precipitation change. Three treatments ( natural precipitation, 30% reduced precipitation, and 30% increased precipitation) and two precipitation patterns in growth season (236 mm and 357 mm) were installed, and the tree growth status as well as the needle photosynthetic rate, transpiration rate, water use efficiency, chlorophyll, proline, soluble protein , and malondialdehyde (MDA) contents, and SOD activity in growth season were measured. The needle photosynthetic rate, transpiration rate, and water use efficiency were positively correlated with precipitation, and precipitation change had significant effects on the eco-physiological characteristics. The water stress in growth season had a lag effect on the growth of Mongolian pine. The changes of the needle N content could reflect the co-action patterns of soil nutrient availability and soil moisture change.关键词
全球变化/沙地生态系统/樟子松人工林/生理生态特征Key words
global change/ sandy land ecosystem/ Pinus sylvestris var Mongolica plantation/eco-physiological characteristics分类
农业科技引用本文复制引用
褚建民,邓东周,王琼,孙学凯,胡守明,杜光和..降雨量变化对樟子松生理生态特性的影响[J].生态学杂志,2011,30(12):2672-2678,7.基金项目
"十二五"国家科技支撑计划项目(2011BAD38B05)、公益性科研究所专项(RIF2010-12)和国家自然科学基金项目(30972418)资助. （2011BAD38B05）
