Experimental study on soil respiration of temperate grassland in China

被引：14

作者：

Wang, GC ^{[1
]}

Du, R ^{[1
]}

Kong, QX ^{[1
]}

Lü, DR ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China

来源：

CHINESE SCIENCE BULLETIN | 2004年 / 49卷 / 06期

基金：

中国国家自然科学基金;

关键词：

CO2; emission; soil respiration; temperate grassland; Inner Mongolia grassland;

D O I：

10.1360/03wd0241

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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 390-866 gC/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.

引用

页码：642 / 646

页数：5