内蒙古典型草原N2O研究刍议

利用中国科学院内蒙古草原生态定位研究站（ＩＭＧＥＲＳ）的气候、土壤、植被、土地利用方式和家畜等方面的资料，根据目前国际上Ｎ２Ｏ的研究进展，分析了内蒙古典型草原区影响Ｎ２Ｏ收支作用的可能控制因子，认为：（１）作为Ｎ２Ｏ主要来源的土壤，其理化性状，尤其是土壤温度、水分状况、土壤有机质和土壤结构等，是影响该地区Ｎ２Ｏ收支平衡的主要控制因子；（２）土地利用方式的改变对Ｎ２Ｏ的释放的影响还不十分清楚。草场农用与一定的耕作管理措施以及对天然草场的人为影响（割草、放牧等）是对Ｎ２Ｏ收支平衡影响的主要方面；（３）家畜排泄物，无论作为本地区的主要燃料，还是作为肥料，在典型草原区Ｎ２Ｏ的释放中起着不可忽视的作用。

Studies on the N2O Emission from the Typical Grassland in the Inner Mongolia

The potential factors which could have effect on N 2 O flow from the typical grassland in the Inner Mongolia was analyzed in this paper, which based on the data from the Inner Mongolia Grassland Ecosystem Research Station (IMGERS) There is abundant evidence that soil physical and chemical characteristics, especially soil temperature, soil moisture and soil organic matter, strongly influence the rate of N 2 O emission To analyze the effect of land use on N 2 O emissionto, more data are required N 2 O emission caused by animal excreta should also be taken into account