Experimental study on soil respiration of temperate grassland in China

编号 zgly0000335935

文献类型 期刊论文

文献题名 Experimental study on soil respiration of temperate grassland in China

作者 WANGGengchen  DURui  KONGQinxin  LUDaren 

作者单位 InstituteofAtmosphericPhysics  ChineseAcademyofSciences  Beijing100029  China 

母体文献 Chinese Science Bulletin;中国科学通报: 英文版 

年卷期 2004,49(6)

页码 642-646

年份 2004 

分类号 S812.9  X171.1 

关键词 实验研究  土壤呼吸  适度放牧  中国  GC  FID  土壤温度  内蒙古牧场  二氧化碳散发  陆地生态系统 

文摘内容 Experimental study on soil respiration of typical temperate grassland in Inner Mongolia was conducted in the period of 1998--2000. Closed chamber and GC/FID techniques were used for measurements of soil and plant respiration. Data analysis of three-year measurements show that temperate grassland soil respiration varied in the range of 390-866gC/m^2·a^-1 and underwent evident seasonal and annual variations. On average, the soil respiration accounts for 70%-88% of the grassland total respiration. Results also show a stronger relation between the soil respiration and soil temperature in water abundant years. Increased rainfall in 1998 made soil respiration increased, while in the dry years,the relation between soil respiration and soil temperature weakened remarkably. Soil water content plays an important controlling role in soil respiration-temperature interrelation for semiarid grassland。