文献类型：期刊文献

中文题名：CO_2浓度增加和施氮对栓皮栎幼苗生理生态特征的影响

英文题名：Eco-physiological response of Quercus variabilis seedlings to increased atmospheric CO_2 and N supply

作者：杜启燃[1] 雷静品[2] 刘建锋[2] 王鹏程[1] 肖文发[3] 潘磊[4]

第一作者：杜启燃

机构：[1]华中农业大学园艺林学学院;[2]中国林业科学研究院林业研究所;[3]中国林业科学研究院森林生态环境与保护研究所;[4]湖北省林业科学研究院

年份：2014

卷号：25

期号：1

起止页码：24-30

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；PubMed;

基金：林业公益性行业科研专项(201404206);国家自然科学基金项目(41371075)资助

语种：中文

中文关键词：栓皮栎CO2浓度增加;施氮;生理生态特征

外文关键词：Quercus variabilis; increased CO2; N supply; eco-physiological response.

分类号：S792

摘要：通过人为控制CO2浓度(700、400μmol·mol-1)和氮素水平(120 kg N·hm-2),研究了CO2浓度增加和氮沉降及其交互作用对北界(辽宁庄河)栓皮栎幼苗生理生态特征的影响.结果表明:CO2浓度升高使栓皮栎幼苗叶片的形态、光合色素含量和氮含量有减小的趋势,暗呼吸速率较对照降低63.3%,可溶性糖增加2.6%.氮沉降对栓皮栎叶片的形态和光合色素含量有明显的促进作用,叶N含量增加而K含量降低,N/K值增加26.7%.CO2和N交互作用对幼苗叶形态和光合作用有明显的促进作用,叶片最大净光合速率和光饱和点分别是对照的1.4倍和2.6倍,暗呼吸速率和光补偿点分别降低65.9%和50.0%.CO2浓度升高和N沉降均对栓皮栎幼苗生长有一定的促进作用,可能导致栓皮栎分布界线北移.
The effect of CO2 enhancement, nitrogen deposition and their interaction on the northern boundary （Zhuanghe in Liaoning Province） of Quercus variabilis seedlings was studied by control- ling the CO2 concentration （700 μmol .mol-1; 400 μmol .mol-1 ） and nitrogen level （ non nitrogen fertilizer： CK; nitrogen fertilizer： 120 kg N . hm-2）. The results showed that under elevated CO2, the Q. variabilis seedlings＇ leaf morphology, photosynthetic pigments and leaf nitrogen content ten- ded to decrease, and the dark respiration rate decreased 63. 3% and soluble sugar increased 2.6%. Nitrogen deposition significantly promoted the Q. variabilis seedlings＇ leaf morphology and photosynthetic pigments, leading to increased leaf nitrogen content, decreased potassium content, and 26.7% of increase in nitrogen to potassium ratio. CO2 and N interaction played a significant role on promoting the Q. variabilis seedlings＇ leaf morphology and photosynthetic. The maximum net photosynthetic and light saturation point were 1.4 and 2.6 times of the control, while dark res- piration and light compensation point decreased 65.9% and 50.0% , respectively. Elevated CO2 and nitrogen deposition had a positive effect on Q. variabilis seedlings to some degree, which might result in the movement of distribution boundary of Q. variabilis to north.