Short Term Effects of a Changing Carbon Input on the Soil Respiration of Picea schrenkiana Forests in the Tianshan Mountains, Xinjiang

被引：1
|
作者：
Shao K. [1 ,2 ]
Gong L. [1 ,2 ]
He X.-M. [1 ,2 ]
Chen W.-J. [1 ,2 ]
Zhang X.-N. [1 ,2 ]
Zhu H.-Q. [1 ,2 ]
机构：
[1] College of Resources and Environmental Sciences, Xinjiang University, Urumqi
[2] Key Laboratory of Oasis Ecological Ministry of Education, Urumqi
来源：
Huanjing Kexue/Environmental Science | 2020年 / 41卷 / 08期
关键词：
Carbon input; Picea schrenkiana; Soil moisture; Soil respiration; Soil temperature;
D O I：
10.13227/j.hjkx.202001091
中图分类号：
学科分类号：
摘要：
The impact of exogenous carbon input changes on forest soil respiration provides the basis for an intensive analysis of the forest carbon cycle. Based on a plant residue addition and removal control experiment, this study investigated the short-term soil respiration response to carbon input changes of Picea schrenkiana on the Tianshan Mountains during their growing season with five different carbon input treatments: control, double litter, no root, no litter, and no input. The results revealed that, during the entire observation period, the cumulative soil respiration rates were 3.38, 3.94, 2.65, 2.87, and 2.01 μmol•(m2•s)-1 in the double litter, control, no litter, no root, and no input treatments, respectively. Compared with the control treatment, the cumulative soil CO2efflux increased by 402.65 g•m-2 in the double litter treatment, whereas it decreased by 515.00, 354.73, and 967.15 g•m-2in the no litter, no root, and no input treatments, respectively. The mineral soil respiration, litterfall respiration, and root respiration contributed 59.46%, 21.49%, and 14.79%, respectively, to the total soil respiration rate. PCA analysis revealed that the soil respiration rate was positively correlated with the soil temperature, soil moisture, soil total phosphorus content, pH, and soil organic carbon content, and negatively correlated with the soil bulk density, while the soil total nitrogen content, carbon nitrogen ratio, and soil electrical conductivity had no effect on the soil respiration rate. © 2020, Science Press. All right reserved.
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页码：3804 / 3810
页数：6
相关论文
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