文章摘要
长株潭地区不同土地利用类型 土壤呼吸动态变化研究
Soil respiration dynamics for different land use types of
  
DOI:
中文关键词: 土地利用  土壤呼吸速率  日变化  季节变化  长株潭地区
英文关键词: land use pattern  soil respiration rate  daily changes  seasonal changes  Changsha-Zhuzhou-Xiangtan
基金项目:湖南省自然科学基金项目(14JJ4042;14JJ2098);湖南省科技厅软科学项目(2011ZK3037);湖南省教育厅科研项目 (11C0514)
作者单位
谢金宁1,熊平生2,许中坚3,莫宏伟1,全斌1 1.湖南科技大学 建筑与城乡规划学院湖南 湘潭 411201 2.衡阳师范学院 资源环境与旅游管理系湖南 衡阳 4210023.湖南科技大学 化学化工学院湖南 湘潭 411201 
摘要点击次数: 1136
全文下载次数: 1614
中文摘要:
      以长株潭亚热带红壤地区为研究区,采用碱液(NaOH)吸收法对植物非生长季节(2011年12月-2012年5月)水田、旱地、马尾松林地和草地4种土地利用类型的土壤呼吸速率进行了测定,并结合水热等因子,对不同土地利用类型土壤呼吸速率的时间差异进行了因果分析.研究结果表明:4种土地利用类型土壤呼吸速率日变化呈单峰曲线,与气温变化趋势一致,水田和旱地土壤呼吸速率在中午最高,马尾松林地和草地土壤呼吸速率在晚上最高;在季节变化中,12月至5月份土壤呼吸速率总体呈上升趋势,但马尾松林地土壤呼吸速率1月份低于12月份、4月份低于3月份,草地则2月份低于1月份、4月份低于3月份;4种土地利用类型的平均土壤呼吸速率由大到小依次为:草地、马尾松林地、水田和旱地;土壤呼吸率主要与气温、土壤温度、湿度、植被生长特性、生物和人类活动等相关.
英文摘要:
      Soil respiration rates under four land use patterns in the red soil region of Changsha-Zhuzhou-Xiangtan region were measured by the lye (NaOH) absorption method during the non-growing season of December 2011 to May 2012. Differences in soil respiration under the four land use patterns and the relationships between soil respiration and air temperature and soil water contents were analyzed. The results showed that deily changes of soil respiration presented single peak curves,and that of air temperature followed a similar trend. Paddy field and non-irrigated farmland had the highest values at noon, while land of pinus massoniana and grassland had the highest values in the evening. Seasonal changes of soil respiration presented increasing trend from December to May as a whole. But soil respiration rate of land of pinus massoniana in January less than that in December, and so does in April less than in March. As to respiration rate of grassland in February less than that in January and so does in April lower than in March. Estimating the soil respiration gave CO2 effluxes from grassland, land of pinus massoniana, paddy field and non-irrigated farmland, during the non-growth season, of 0.45,0.277 805,0.228 144,0.210 406 g·m-2·h-1, respectively. The results also show that air temperature, soil temperature, humidity, vegetation growth characteristics, biological and human activities are closely related to CO2 respiration.
查看全文   查看/发表评论  下载PDF阅读器
关闭