东北地区落叶松人工林的根系呼吸  

Root Respiration in Larix gmelinii Plantations in Northeast China

作　　者：姜丽芬[1] 石福臣[2] 王化田[3] 祖元刚[1] 小池孝良 

机构地区：[1]东北林业大学森林植物生态学教育部重点实验室,哈尔滨150040 [2]南开大学生命科学学院,天津300071 [3]上海应用技术学院生物与食品工程系,上海20023 [4]Hokkaido University Forests,Sapporo

出　　处：《植物生理学通讯》2004年第1期27-30,共4页Plant Physiology Communications

基　　金：中国科学院地理科学与资源研究所创新工程研究项目(CXIOG-E01-06和SJ10G-D01-02);国家自然科学基金(30070133)

摘　　要：落叶松根系呼吸速率在6～9月期间逐渐升高，8月达到高峰，之后明显下降。幼林根系呼吸速率和根系呼吸占土壤总呼吸的比例均高于成熟林。根系呼吸速率与根生物量呈线性相关，与土温呈指数相关，与土壤含水量无明显相关关系，但温度较高时，土壤湿度的增加能促进根系呼吸。成熟林和幼林根系呼吸的Q10值分别为5．56和4．17。Root respiration rate of the larch plantations of both ages increased from June to Aug., and peakedin Aug. After Aug., the root respiration rate declined sharply. The root respiration rate and percentage of rootrespiration to total soil respiration of the young forest were higher than those of the mature forest. The rootrespiration was linearly correlated with root biomass and was exponentially correlated with soil temperature.There was no obvious correlation between the root respiration and soil moisture, but when soil temperature washigher, increase of soil moisture could promote root respiration. Q10 values of the root respiration of the matureforest and the young forest were 5.56 and 4.17 respectively.

关 键 词：兴安落叶松 根系呼吸 土壤总呼吸 人工林 

分 类 号：S718.43[农业科学—林学]