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[1]田晓龙 田思惠 张乾 汪依妮 柳鑫 金宝成 赵学春**.三工河流域5种荒漠群落土壤有机碳动态[J].应用与环境生物学报,2020,26(03):1-15.[doi:10.19675/j.cnki.1006-687x.2019.07045]
 TIAN Xiaolong,TIAN Sihui,ZHANG Qian,et al.Soil organic carbon dynamic of five desert communities in Sangong River basin[J].Chinese Journal of Applied & Environmental Biology,2020,26(03):1-15.[doi:10.19675/j.cnki.1006-687x.2019.07045]
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三工河流域5种荒漠群落土壤有机碳动态()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
26卷
期数:
2020年03期
页码:
1-15
栏目:
出版日期:
2020-06-25

文章信息/Info

Title:
Soil organic carbon dynamic of five desert communities in Sangong River basin
作者:
田晓龙1 田思惠2 张乾1 汪依妮3 柳鑫2 金宝成1 赵学春1**
1贵州大学动物科学学院 贵阳 550025
2中国科学院植物研究所 北京 100093 3
贵州省草地技术试验推广站 贵阳 550025
Author(s):
TIAN Xiaolong1 TIAN Sihui2 ZHANG Qian1 WANG Yini3 LIU Xin2 JIN Baocheng1&ZHAO Xuechun1**
1College of Animal Science, Guizhou University, Guiyang 550025, China
2Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
3Guizhou Grassland Technology Test and Extension Station, Guiyang 550025, China
关键词:
荒漠群落土壤有机碳细根凋落物土壤因素
Keywords:
desert communities soil organic carbon fine root litter soil factors
DOI:
10.19675/j.cnki.1006-687x.2019.07045
摘要:
土壤有机碳是土壤质量和健康的重要指标,其来源是根系和凋落物,了解土壤有机碳的分布格局及土壤有机碳密度、储量与细根、凋落物的关系,是深入理解荒漠生态系统碳循环过程的关键。以新疆三工河流域的骆驼刺(Alhagi sparsifolia)、沙枣(Elaeagnus angustifolia)、多枝柽柳(Tamarix ramosissima)、芦苇(Phragmites australis)、梭梭(Haloxylon ammodendron)等5种荒漠群落为研究对象,采用连续土钻取样法和土柱法,研究了土壤有机碳的密度、储量和细根、凋落物对土壤有机碳的补充。结果表明,随着土层深度的增加,5个群落的土壤有机碳含量均呈逐渐降低的趋势,最大值均出现在0-5 cm土层;5个群落的土壤有机碳密度和0-100 cm土壤有机碳储量分别为3.19 kg/m2、306.87 g/m2,土壤有机碳的总储量为5.13 × 105 t。5个群落的凋落物年产量为10.10 g/m2-79.78 g/m2,通过分解每年补充的土壤有机碳为0.44 g/m2-9.53 g/m2,占土壤有机碳储量的0.21%-3.94%。5个群落的细根周转速率为1.41-1.98次/a,通过分解每年补充的土壤有机碳为6.31 g/m2-44.12 g/m2,占土壤有机碳储量的2.25%-20.90%,是凋落物贡献的2.09-2.58倍。可见,细根和凋落物对土壤有机碳库的积累起关键作用,细根较凋落物对土壤有机碳的贡献更大。
Abstract:
Soil organic carbon is an important indicator of soil quality and soil health, result from plant roots and litters. The aims of this study were to understand the distribution pattern of soil organic carbon, the relationship between soil organic carbon and fine roots, litters in five desert communities in Sangong River basin of China. In this research, soil drill sampling method and sequential soil coring were used to investigate the distribution pattern of soil organic carbon and the effects of fine roots and litters on soil organic carbon in Alhagi sparsifolia, Elaeagnus angustifolia, Tamarix ramosissima, Phramites australis, and Haloxylon ammodendron communities. Results show that soil organic carbon content decreased with soil depth, and the maximum values of the five communities all appeared at 0-5 cm soil layer. The soil organic carbon density and soil organic carbon stock in 0-100 cm soil layer of the five communities were 3.19 kg/m2 and 306.87 g/m2, the total soil organic carbon storage was 5.13 × 105 tons . The annual production of litters in the five communities was 10.10 g/m2-79.78 g/m2, and the annual replenishment of soil organic carbon through the decomposition of litters was 0.44 g/m2-9.53 g/m2, accounting for 0.21%-3.94% of the soil organic carbon stock. The fine root turnover rate of the five communities was 1.41-1.98 times/yr, and the soil organic carbon replenishment through decomposition was 6.31 g/m2-44.12 g/m2, accounting for 2.25%-20.90% of the soil organic carbon stock, and 2.09-2.58 multiples of the contribution of litters. This shows that fine roots and litters play a key role in the accumulation of soil organic carbon stock, and fine roots contribute more organic carbon to soil than litters.

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备注/Memo

备注/Memo:
收稿日期Received: 2019-07-23 接受日期Accepted: 2019-11-22
*贵州省科技厅-贵州大学联合基金项目(黔科合LH字[2017] 7288号)、国家自然科学基金青年项目(31700390)、国家自然科学基金地区项目(31560670)和贵州大学人才引进项目(贵大人基合字[2014] 13号和贵大人基合字[2016] 75号)资助
**通讯作者Corresponding author (xczhao@gzu.edu.cn)
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更新日期/Last Update: 2019-12-04