文献类型：期刊文献

中文题名：华北石质山区刺槐人工林的土壤呼吸

英文题名：Soil Respiration of Robinia pseudoacacia Plantation in the Rocky Mountainous Area of North China

作者：张劲松[1] 孟平[1] 王鹤松[1] 高峻[1] 任庆福[1] 贾长荣[2] 任迎丰[2]

第一作者：张劲松

机构：[1]中国林业科学研究院林业研究所国家林业局林木培育重点实验室,北京100091;[2]河南省济源市国有大沟河林场,济源454650

年份：2008

卷号：44

期号：2

起止页码：8-14

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：科技部社会公益性项目(2003DIB4J142);国家十五攻关课题(2004BA510B11);黄河小浪底森林生态系统定位研究站基金资助

语种：中文

中文关键词：华北石质山区;刺槐人工林;土壤呼吸

外文关键词：the rocky mountain in north China; Robinia pseudoacacia plantation; soil respiration

分类号：S718.55

摘要：2006年1—12月,利用Li-8100土壤呼吸自动观测系统及AR5土壤温度湿度自动观测系统观测土壤呼吸速率、土壤温度及湿度,分析华北石质山区35年生刺槐林土壤呼吸速率时间变化规律及其影响机制。结果表明:1)刺槐林土壤呼吸速率日内变化特征不明显,但日际及季节变化明显,全年呈现出单峰变化趋势,且与土壤温度的日际及季节变化趋势基本一致。具体表现为:1—3月土壤呼吸速率较低,日际变化略有波动,从4月开始逐渐上升,直至7月达到最大值,而后开始逐渐下降,直至11月约降低至1—3月时的水平,并保持到12月。全年土壤呼吸速率平均值为2.50μmol·m-2s-1,主要生长季(4—10月)土壤呼吸速率明显高于非主要生长季(1、2、11及12月),二者分别为3.63与0.90μmol·m-2s-1。2)刺槐林地土壤呼吸速率与表层0cm、地下5、10、15和20cm深度处土壤温度都存在极显著的指数相关关系(p<0.01),且与土深20cm处温度的相关性最好。上述不同深度处的Q10值分别是2.20、2.28、2.34、2.40和2.48。3)刺槐林地土壤含水量与土壤呼吸速率的相关关系不明显。
The soil respiration, temperature and moisture under Robinia pseudoacacia plantation in the rocky mountain of north China were investigated. Soil respiration rate was measured with Li - 8100, and the temperature and moisture were monitored with AR5 from January to December in 2006. The results showed that the diurnal variation of soil respiration rate （SRR） was not remarkable, while the daily and seasonal variation was significant and displayed one single peak curve in the whole year, which basically accorded with the trend of the daily and seasonal variation of the soil temperature. The daily SRR was the lowest with almost unchanged daily from January to March and gradually rose in April, and then rapidly increased in May. It reached a maximum during July, and then decreased until November, when it approximated to that from January to March and didn＇t change any longer until the end of December. SRR in the main growth season （April to October） was markedly higher than that in the minor growth season, and they were 3.63 and 0.90 μmol · m^-2 s^-1 respectively. The annual average SRR was 2.50 μmol · m^-2 s^-1 . Soil respiration rate was significantly （p 〈 0.01） correlated with the soil temperature at each of the 0, 5,10,15 and 20 cm depth, with the best correlation at 20 cm. The SRR exponentially increased in response to the soil temperature. Q10 was 2.20, 2.28, 2.34, 2.40 and 2.48, respectively, at the above different depths. There was no significant relationship found between SRR and soil water content.