浙江农业学报

• 环境科学 • 上一篇    下一篇

内蒙古呼伦湖4种典型草地生长季土壤呼吸研究

  

  1. (1 中央民族大学 生命与环境科学学院,北京 100081;2 内蒙古达赉湖国家级自然保护区管理局,内蒙古 海拉尔 021008;3 青州市中医院,山东 青州 262500)
  • 出版日期:2015-07-25 发布日期:2015-08-03

Soil respiration feature of 4 types of grassland in growing season in Hulun Lake, Inner Mongolia#br#

  1. (1 College of Life and Environment Science, Minzu University of China, Beijing 100081, China; 2 Administrative Bureau of the Dalai Lake National Nature Reserve, Hailaer 021008, China; 3 Traditional Chinese Medical Hospital of Qingzhou City, Qingzhou 262500, China)
  • Online:2015-07-25 Published:2015-08-03

摘要: 利用LI\|6400便携式光合仪及LI\|6400\|09土壤呼吸室,于2014年6月和8月对内蒙古呼伦湖湿地上分别以克氏针茅(Stipa capillata)、羊草(Leymus chinensis)、芦苇(Phragmites australis)、寸草苔(Carex duriuscula)为优势种的4种草地进行样方调查和土壤呼吸测量。结果表明,以克氏针茅、羊草和寸草苔为优势种的草地在6月和8月土壤呼吸呈单峰曲线,变化趋势基本一致。以芦苇为优势种的草地6月和8月土壤呼吸日变化比较平稳。从6月到8月,以克氏针茅、羊草和芦苇为主的草地土壤呼吸均值呈增加趋势,相较于6月的土壤呼吸数值,8月数值分别增加了6281%,7969%和23369%。以寸草苔为主的草地2个月份土壤呼吸均值基本一致。

关键词: 生物量, 土壤呼吸日变化, 土壤水分

Abstract: The present experiment was conducted in Hulun Lake, Inner Mongolia in June and August, 2014. Soil respiration of 4 kinds of typical grassland (dominant species were Stipa capillata, Leymus chinensis, Phragmites australis and Carex duriuscula) had been measured using LI\|6400 gas exchange system and Li\|6400\|09. It was shown that the diurnal variety of soil respiration of Stipa capillata, Leymus chinensis and Carex duriuscula land was a one peak curve both in June and August, while Phragmites australis land exhibited a steady line. Soil respiration of Stipa capillata, Leymus chinensis, Phragmites australis land in August was higher than that in June. Comparing with the mean value in June, soil respiration of Stipa capillata, Leymus chinensis, Phragmites australis land increased 6281%, 7926%, 23369%, respectively. But, soil respiration of Carex duriuscula land remained the same in June and August.

Key words:  biomass, diurnal variety of soil respiration, soil water content