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| 干旱区3种林地生态系统土壤CO2的排放特征 | |
| 引用本文： | 贾宏涛,朱新萍,盛钰,赵成义,许有金,K.G.卡迪罗夫.干旱区3种林地生态系统土壤CO2的排放特征[J].中国水土保持科学,2013,11(1):95-98. |
| 作者姓名： | 贾宏涛 朱新萍 盛钰 赵成义 许有金 K.G.卡迪罗夫 |
| 作者单位： | 1. 新疆农业大学草业与环境科学学院,830052,乌鲁木齐 2. 中科院新疆生态与地理研究所,830011,乌鲁木齐 3. 塔吉克斯坦农业大学农学院,734017,杜尚别 |
| 基金项目： | 国家国际科技合作计划“气候变化对中亚地区荒漠化的影响”(2010DFA9272013);新疆土壤学重点学科资助项目 |
| 摘 要： | 以新疆三工河流域的梭梭、柽柳及云杉3种林地为监测对象，对不同林地生态系统土壤CO，排放特征进行对比研究，结果表明：1）梭梭林土壤呼吸速率的日变化曲线8月份为双峰曲线，而6月和10月份为单峰曲线。梭梭林地土壤SO2日释放量表现为8月（4．34g／（m^2.d））〉6月（1．86g／（m^2·d））〉10月（1．17g／（m^2·d））。6月、10月土壤呼吸速率均白天高于夜间，而8月则正好相反。2）8月份几种林地类型的土壤SO2日释放量表现为云杉林（21．71g／（m^2·d））〉梭梭林（4．34g／（m^2·d））〉柽柳林（1．84g／（m^2·d））。8月份云杉、柽柳土壤呼吸日变化曲线与梭梭林地的双峰曲线不同，均为单峰曲线。云杉林、柽柳林的土壤呼吸速率均白天高于夜间，而梭梭林则正好相反。3）云杉林地土壤SO2释放速率与土壤温度呈显著正相关，而梭梭林地生态系统土壤SO2释放速率与空气相对湿度成显著正相关。 |
| 关 键 词： | 林地 CO2排放 日变化 干旱区 |
Characteristics of soil CO2 emission of 3 kinds of woodland ecosystems in arid areas |
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| Jia Hongtao , Zhu Xinping , Sheng Yu , Zhao Chengyi , Xu Youjin , K.G.Kadipov.Characteristics of soil CO2 emission of 3 kinds of woodland ecosystems in arid areas[J].Science of Soil and Water Conservation,2013,11(1):95-98. | |
| Authors: | Jia Hongtao Zhu Xinping Sheng Yu Zhao Chengyi Xu Youjin KGKadipov |
| Institution: | Jia Hongtao1,Zhu Xinping1,Sheng Yu2,Zhao Chengyi 2,Xu Youjin1,K.G.Kadipov3(1.College of Pratacultural and Environmental Sciences,Xinjiang Agricultural University,830052,Urumqi; 2.Xinjiang Ecological Geography Research Institute,CAS,830011,Urumqi:China; 3.Agricultural College of Tajikistan Agrarian University,734017,Dushanbe,Tajikistan) |
| Abstract: | Abstract： The experiment was conducted with Halaxylon ammodendron, Tamarix ramosissma Ledeb, and Picea schrenkiana woodland ecosystems as the subject monitored in Sangong River Basin in Xinjiang, and their soil CO2 emission characteristics are studied comparatively. The results showed that： 1 ） the diurnal variation of soil respiration rate in H. ammodendron forest during August is a bimodal curve, while it is unimodal curve in June and October. Daily soil CO2 emission in H. ammodendron forest in a descending order was August （4.34g/（m^2·d）） 〉June （1.86 g/（m^2·d）） 〉October （1.17 g/（m^2·d） ）. Soil respiration rate was higher in the day than that in the night in both June and October but quite the reverse in August. 2） Daily soil CO/ emission in different forests in a descending order was P. schrenkiana forest （21.71 g/（m^2·d） ） 〉 H. ammodendron forest （4. 34 g/（ m^2·d） ） 〉 T. ramosissma Ledeb forest （1.84 g/（ m^2·d） ） in August. The both curves of soil respiration rate of P. schrenkiana schrenkiana forest and T. ramosissma Ledeb forest were unimodal curves, which were different from of bimodal curve of H. ammodendron forest. The soil respiration rate in both P. schrenkiana forest and T. ramosissma Ledeb forest were higher in day than that in night, but quite the reverse in H. ammodendron forest. 3 ） Soil CO2 emission rate has significant positive correlation schrenkiana forest, while soil CO2 emission rate has significant positive humidity in H. ammodendron forest. |
| Keywords: | woodland CO2 emission diurnal variation arid areas with soil temperature correlation with air in P relative |
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