| 天山北坡典型草地土壤呼吸特征及其对环境因子的响应 |
| |
| 引用本文： | 郭文章,井长青,邓小进,陈宸,赵苇康,侯志雄,王公鑫.天山北坡典型草地土壤呼吸特征及其对环境因子的响应[J].中国农业科技导报,2022,24(10):189-199. |
| |
| 作者姓名： | 郭文章 井长青 邓小进 陈宸 赵苇康 侯志雄 王公鑫 |
| |
| 作者单位： | 1.新疆农业大学草业学院，新疆草地资源与生态重点实验室，西部干旱荒漠区草地资源与生态教育部重点实验室，乌鲁木齐 830052;2.新疆农业大学资源与环境学院，乌鲁木齐 830052 |
| |
| 基金项目： | 新疆维吾尔自治区重点实验室开放课题项目(2020D04037) |
| |
| 摘 要： | 为揭示天山北坡不同类型草地的土壤呼吸规律，采用土壤碳通量测量系统LI-840A对天山北坡荒漠草原和灌丛草甸土壤呼吸（soil respiration，Rs）日变化和季节动态进行监测，并利用多元回归模型分析温度和水分对草地土壤呼吸的协同影响。结果表明，2种草地类型生长季土壤呼吸速率均表现为日间先增高后降低，夜间较平缓的日变化趋势，日最大排放速率出现在12:00—16:00，最小值出现在6:00—7:00左右；灌丛草甸生长季各个月份的土壤呼吸速率均高于荒漠草原。2种草地类型土壤呼吸速率与温度均呈指数相关；土壤含水量与灌丛草甸土壤呼吸速率的相关性高于与荒漠草原土壤呼吸速率的相关性；土壤呼吸速率受5 cm土壤温度（T）和5 cm土壤含水量（W）的影响显著，荒漠草原土壤呼吸速率与二者之间满足最佳拟合模型Rs=130.515e0.031TW2.513，灌丛草甸满足最佳拟合模型Rs =-1.290+0.010T+28.007W+1.199TW。研究结果揭示了荒漠草原和灌丛草甸土壤呼吸的变化规律，为天山北坡草地碳循环研究提供基础数据和理论支持。
|
| 关 键 词： | 天山北坡 土壤呼吸 荒漠草原 灌丛草甸 环境因子 |
| 收稿时间： | 2021-04-06 |
Soil Respiration Characteristics of Typical Grassland on the Northern Slopes of the Tianshan Mountains and Their Response to Environmental Factors |
| |
| Wenzhang GUO,Changqing JING,Xiaojin DENG,Chen CHEN,Weikang ZHAO,Zhixiong HOU,Gongxin WANG.Soil Respiration Characteristics of Typical Grassland on the Northern Slopes of the Tianshan Mountains and Their Response to Environmental Factors[J].Journal of Agricultural Science and Technology,2022,24(10):189-199. |
| |
| Authors: | Wenzhang GUO Changqing JING Xiaojin DENG Chen CHEN Weikang ZHAO Zhixiong HOU Gongxin WANG |
| |
| Institution: | 1.College of Grassland Science, Xinjiang Agricultural University, Xinjiang Key Laboratory of Grassland Resources and Ecology, Key Laboratory of Grassland Resources and Ecology of Western Arid Region, Ministry of Education, Urumqi, 830052, China;2.School of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China |
| |
| Abstract: | To reveal soil respiration patterns of different types of grassland on the northern slopes of the Tianshan Mountains， this study used the soil carbon flux measurement system LI-840A to monitor the daily and seasonal dynamics of soil respiration （Rs） in desert steppe and shrub meadows on the northern slopes of the Tianshan Mountains. The results showed that the daily variation of soil respiration rate in both types of grasslands in the growing season increased first and then decreased in the day time， and the variation trend was gentle at night， with the maximum daily emission rate occurring at 12:00—16:00 and the minimum value occurring at 4:00—7:00. The soil respiration rate of shrub meadows was higher than the rate of desert steppes in all months of the growing season. Soil respiration was exponentially correlated with temperature in both types of grasslands. Soil water content was more correlated with the soil respiration rate of shrub meadows than with the soil respiration rate of desert steppes. Soil respiration rate was significantly influenced by soil temperature at 5 cm depth （T） and 5 cm soil water content （W）. The best-fit model between the soil respiration rate of desert steppes and both variables was Rs=130.515e0.031TW2.513， whereas shrub meadows satisfied the best-fit model of Rs=-1.290 + 0.010T + 28.007W + 1.199 TW. The purpose of this paper revealed the changing law of soil respiration in desert steppe and shrub meadow， and provided basic data and theoretical support for the study of grassland carbon cycle on the northern slopes of Tianshan Mountains. |
| |
| Keywords: | northern slopes of the Tianshan Mountains soil respiration desert steppe shrub meadow environmental factors |
|
| 点击此处可从《中国农业科技导报》浏览原始摘要信息 |
| 点击此处可从《中国农业科技导报》下载免费的PDF全文 |
