阔叶红松林主要树种幼树对干旱胁迫的响应

Response of Five Dominant Species to Drought in Broad-leaved Korean Pine Forests

以组成我国北方典型阔叶红松林森林生态系统的主要树种水曲柳、红松、蒙古栎、紫椴和核桃楸为研究对象,模拟不同土壤水分变化对树木生物量、光合特征和水分利用率的影响,分析我国北方典型森林生态系统对未来气候干旱化的响应及适应机制,提出北方典型森林生态系统对未来气候变暖引起的对干旱化的响应与适应对策。

Soil water stress experiments were conducted to examine the biomass ,photosynthesis characteristics and water use efficiency （WUE） of Fraxinux mandshurica, Pinus koraiensis, Tilia amurensis, Juglans mandshurica and Quercus mongolica, five dominant species in the broad- leaved Korean pine forests in Changbai Mountain. Three soil moisture gradients were designed： 85% ～ 100% （high water, CK）, 65% ～ 85% （Medium water, MW） and 45% ～ 65% （low water, LW） of field water- bolding capacity. This paper analyzed the response mechanism to drought and brought forward countermeasures to global wanning in the typical forest ecological systems in northern areas of our country.