恩施典型烟田烤烟生长期土壤呼吸变化与碳平衡

戴衍晨; 王瑞; 申国明; 张继光; 李志刚; 张继旭; 刘龙; 薄国栋; 高林

doi:10.13496/j.issn.1007-5119.2015.04.011

恩施典型烟田烤烟生长期土壤呼吸变化与碳平衡

1.
中国农业科学院烟草研究所, 农业部烟草生物学与加工重点实验室, 青岛 266101
2.
湖北省烟草公司恩施州公司, 湖北恩施 445000

基金项目: 中国烟草总公司科技重点项目“‘清江源'生态富硒特色烟叶生产关键技术研究与应用”(110201202014);国家自然科学基金(41201291)

详细信息

作者简介:
戴衍晨(1990-),男,在读硕士,主要研究方向为土壤生态。E-mail:dyc514232@163.com

通讯作者:
高林, E-mail: gllg2000@126.com

中图分类号: S572.06
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出版历程
- 收稿日期: 2015-01-22
- 修回日期: 2015-04-03
- 刊出日期: 2015-08-27

Variations of Soil Respiration during Flue-cured Tobacco Growth Period and Carbon Balance in Tobacco Fields

1.
Tobacco Research Institute, ChineseAcademy of Agricultural Sciences, Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture, Qingdao 266101, China
2.
Enshi Branch of Hubei Tobacco Company, Enshi, Hubei 445000, China

摘要

摘要: 采用静态箱—红外CO₂分析法研究了烟田垄体土壤呼吸、土壤微生物呼吸和垄间土壤呼吸在烤烟生长期的变化特征以及垄体土壤呼吸组分的贡献率,估算了烤烟生长期烟田生态系统碳平衡。结果表明,受烤烟生长和土壤温度的影响,垄体土壤呼吸速率具有明显的生长期变化特征,还苗期与伸根期土壤呼吸速率增长较慢,后期土壤呼吸速率逐步增大,在移栽后第107天达到最大值C 256.8 mg/(m²·h)。土壤微生物与垄间土壤呼吸速率在烤烟生长期变化较小。垄体土壤呼吸及其组分和垄间土壤呼吸在10 cm土层温度的Q₁₀值大小顺序为:根系呼吸>垄体土壤呼吸>土壤微生物呼吸>垄间土壤呼吸。整个烤烟生长期根系呼吸与土壤微生物呼吸占垄体土壤呼吸的均值分别为44.2%、55.8%,净初级生产力碳固定量C 2975.9 kg/hm²,土壤异养呼吸碳释放量C 1409.1 kg/hm²,烟田生态系统净碳输入C 1566.8 kg/hm²。
- 烟田 /
- 静态箱法 /
- 土壤呼吸 /
- 根系呼吸 /
- 碳平衡
Abstract: In order to investigate the variations of soil respiration rate during flue-cured tobacco growth period and carbon balance of tobacco field ecosystems, a closed chamber technique (infrared CO₂ analyser) was used to determine variations of respiration rate of the ridge soil, the ridge soil without roots (soil microbial) and the soil between ridges.The contribution of root respiration to the ridge soil respiration was analyzed and the carbon balance of tobacco field ecosystems was estimated. The results showed that during the flue-cured tobacco growth period, the ridge soil respiration was affected by flue-cured tobacco growth and soil temperature, displaying a significant seasonal variation. During the early growth period, the soil respiration rate increased slowly, and then it increased gradually, with a peak occurring on the 107th day C 256.8 mg/(m²·h) after tobacco seedling transplanting. Seasonal variation of respiration rate of the ridge soil without roots and the soil between ridges was not significant. The order of Q₁₀ value of soil temperatureat 10 cm depth with the ridge soil respiration with its components and respiration of the soil between ridges was root respiration>the ridge soil respiration>soil microbial respiration> the soil between ridges respiration. During the whole growth period, the contribution of root respiration to the ridge soil respiration was 44.2%, while the soil microbial respiration was 55.8%. In the flue-cured tobacco fields, the net primary productivity carbon was C 2975.9 kg/hm², and soil heterotrophic respiration to release carbon was C 1409.1 kg/hm² and the net ecosystem carbon budget was C 1566.8 kg/hm².
- tobacco field /
- closed chamber technique /
- soil respiration /
- root respiration /
- carbon balance

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