文献类型：期刊文献

中文题名：江西大岗山杉木人工林生态系统土壤呼吸研究

英文题名：Study on Soil Respiration of Chinese Fir Plantation Ecosystem in Dagangshan of Jiangxi

作者：陈滨[1] 赵广东[1] 冷泠[1] 王兵[1]

第一作者：陈滨

机构：[1]中国林业科学研究院森林生态环境与保护研究所国家林业局森林生态环境重点实验室

年份：2007

卷号：30

期号：3

起止页码：12-16

中文期刊名：气象与减灾研究

外文期刊名：Meteorology and Disaster Reduction Research

基金：国家自然科学基金重大项目(编号:30590381);国家林业科技支撑计划课题(编号:2006BAD03A07);国家林业局林业新技术开发与储备专项(编号:2006-67)

语种：中文

中文关键词：杉木人工林;土壤呼吸速率;环境因子

外文关键词：Chinese fir plantation, Soil respiration rate, Environmental factor.

分类号：X171.1

摘要：以江西大岗山杉木人工林为研究对象,采用LI-6400便携式光合测定系统及土壤呼吸叶室6400-09,在2005年4—10月和2006年4—10月,连续测定了2个生长季的土壤CO2释放速率,并对土壤呼吸规律进行了分析研究。结果表明,土壤呼吸的日动态和季节动态都呈单峰型;土壤呼吸速率与地表空气温度和0～10 cm土壤温度的指数回归关系良好,但单独用土壤含水率的变化解释土壤呼吸速率变异是不合适的。选择0～10 cm土壤温度和0～10 cm土壤含水率解释土壤呼吸速率的变异,双因子模型比单因子模型好。根据土壤呼吸速率与0～10 cm土壤温度的指数模型,结合试验地2006年1—12月的气象资料,计算出大岗山杉木人工林土壤呼吸年释放碳量为9.80 t.hm-2。
Based on a major type of plantation, Chinese fir plantation in Jiangxi, LI-6400 portable photosynthesis measurement system and its soil respiration fitting 6400-09 have been employed to measure the CO2 emission rate of soil during its two consecutive growing seasons, from April to October in 2005 and 2006, and the rules of soil respiration were also studied. The results show that the curves of both diurnal and seasonal dynamic variations of soil respiration rate present ＂single peaks＂. In the diurnal time scale, soil respiration rate shows good exponential relationship with surface air temperature and 0-10 cm soil temperature. However, it is inappropriate to explain the variance of soil respiration rate using the variation of soil water containing rate alone in different time scales. Therefore, the double-factor model is better to explain the variance of soil respiration rate than the single-factor model. Based on the exponent model, R=0.946e^0.064（n=44, r^2=0.846）, combined with 0-10 cm soil temperature data, it is calculated that the annual carbon emission of soil respiration is 9.80 t. hm^-2. a^-1.