Contribution of Fine Root Production and Turnover to Soil Organic Carbon in Tamarix ramosissima Community in Sangong River Basin of Xinjiang, China

WANG Jian-jian; ZHAO Xue-chun; LAI Li-ming; ZHU Lin-hai; WANG Yong-ji; ZHOU Ji-hua; JIANG Lian-he; MA Yuan-jian; ZHAO Chun-qiang; ZHENG Yuan-run

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Contribution of Fine Root Production and Turnover to Soil Organic Carbon in Tamarix ramosissima Community in Sangong River Basin of Xinjiang, China

1.
Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Qingchengshan-Dujiangyan Scenic Spots Authority, Dujiangyan 611843, Sichuan, China

Received Date: 2013-09-02

Abstract

The fine root production and turnover are important parts of the terrestrial ecosystem carbon cycle, but few researches were conducted on fine root turnover and its contribution to soil carbon cycling of Tamarix ramosissima Lour. community in arid ecosystem. In this research, a typical native T. ramosissima community was selected, and the continuous soil drilling method and fine root bag method were used to investigate the monthly fine root dynamic, production and fine root turnover from May to October, 2010 (the whole growing season). The results showed that the soil water content increased with the depth of soil, while the soil organic carbon decreased. The mean fine root biomass in the community was 93.10 g·m-2 and the live fine root biomass and dead fine root biomass were 73% and 27% of total fine root biomass in the community, respectively. The dynamics of biomass and necromass of fine root in the T. ramosissima community showed the same pattern in the growing season, the biomass slightly increased from May to September, and then decreased. The fine root biomass in the community increased at first, and then reduced gradually with the increase of soil depth. The fine root biomass in 0－40 cm soil layer was the largest parts, with 88.01% of total fine root biomass for the community. The fine root decomposition rate showed a sharp decline to the minimum then declined steadily for the community, and the annual fine root decomposition rate was 51.24% for the community. 351 days and 1 359 days were needed to reach half decomposition and 95% decomposition for the community. The net productivity of fine root in the community was 118.81 g·m-2, the fine root annual turnover rate was 1.98 times·a-1, and the annual input from fine root mortality to underground soil organic carbon was 42.68 g·m-2·a-1. These results showed that the annual input from fine root turnover to underground soil organic carbon counted for only a small portion of the soil organic carbon, however, in a long time, the fine root carbon is a crucial for soil carbon pool in arid area.
- Tamarix ramosissima community,
- fine root biomass,
- fine root decomposition and turnover,
- soil organic carbon

References

[1]	Kirsi M, Heljä-Sisko H. Assessing fine-root biomass and production in a Scots pine stand-comparison of soil core and root ingrowth core methods [J]. Plant and Soil, 1999, 210:43-50.
[2]	Dietrich H, Christoph L. A comparison of four different fine root production estimates with ecosystem carbon balance data in a Fagus-Quercus mixed forest [J]. Plant and Soil, 2002, 239:237-251.
[3]	Heljä S H, John D, Pekka N, et al. Fine root biomass in relation to site and stand characteristics in Norway spruce and Scots pine stands [J]. Tree Physiology, 2007, 27:1493-1504.
[4]	Ruess R W, Hendrick R L, Burton AJ,et al. Coupling fine root dynamics with ecosystem carbon cycling in black spruce forests of interior Alaska [J]. Ecological Monographs, 2003,73: 643-662.
[5]	Finér L,Ohashi M,Noguchi K,et al. Factors causing variation in fine root biomass in forest ecosystems [J]. Forest Ecology and Management,2011, 261: 265- 277.
[6]	丁金枝, 来利明, 赵学春, 等.荒漠化对毛乌素沙地土壤呼吸及生态系统碳固持的影响[J]. 生态学报, 2011, 31( 6): 1594 -1603.
[7]	杨小林,张希明,单立山,等.塔克拉玛干沙漠腹地塔克拉玛干柽柳根系构筑型研究[J].干旱区研究, 2008, 25 (5): 660-657.
[8]	单立山, 张希明, 柴仲平, 等.多枝柽柳幼苗根系分布对灌溉量的响应[J].干旱区研究, 2007, 24( 2 ): 213 - 218.
[9]	Olson J S. Energy storage and the balance of producers and decomposition in ecological systems [J]. Ecology, 1963, 44: 332-341.
[10]	Vogt K A, Grier C C, Vogt D J. Production, turnover and nutrient dynamics of above- and below-ground detritus of world forests [J]. Advances in Ecological Research, 1986, 15: 303-377.
[11]	张小全. 环境因子对树木细根生物量、生产与周转的影响[J]. 林业科学研究, 2001, 14( 5): 566-573.
[12]	Jackson R B, Mooney H A, Schulze E D.A global budget for fine root biomass, surface area, and nutrient contents [J]. Proceedings of the National Academy of Sciences of the United States of America, 1997, 94: 7362-7366.
[13]	Jha P, Mohapatra K P. Leaf litterfall, fine root production and turnover in four major tree species of the semiarid region of India [J]. Plant and Soil, 2010, 326: 481- 491.
[14]	Marianne K, Burke, Dudley J R. Fine root growth phenology, production and turnover in a northern hardwood forest ecosystem [J]. Plant and Soil, 1994, 162:135-146.
[15]	Sutton R E.Soil properties and root development in forest trees: a review [J]. Information report O-X-413, Ministry of natural resources, Ontario, Canada, 1991.
[16]	John B, Pandey H N, Tripathi R S. Vertical distribution and seasonal changes of fine and coarse root mass in Pinus kesiya Royle ExGordon forest of three different ages [J]. Acta Oecologica, 2001, 22:293-300.
[17]	Fahey T J, Hughes J W. Fine root dynamics in a northern hardwood forest ecosystem, hubbard brook experimental forest [J]. Journal of Ecology, 1994, 82:533-548.
[18]	Santantonio D, Hermann R K, Overton W S. Root biomass studies in forest ecosystems [J]. Pedobiologia, 1977, 17:1-31.
[19]	Berg B. Plant litter: decomposition, human formation, carbon sequestration [M]. Berlin: Springer,2003.
[20]	Wieder R K, Wright S J. Tropical forest litter dynamics and season irrigation on Barro Colorado Island, Panama [J]. Ecology, 1995, 76: 1971-1979.
[21]	Eissenstat D M, Wells C E, Yanai R D, et al. Building roots in a changing environment: implications for root longevity [J]. New Phytologist, 2000,147:33-42.
[22]	Gill R A, Jackson R B. Global patterns of root turnover for terrestrial ecosystems [J]. New Phytologist, 2000, 147:13-31.
[23]	裴智琴,周勇,郑元润,等.干旱区琵琶柴群落细根周转对土壤有机碳循环的贡献[J].植物生态报,2011, 35 (11): 1182-1191.
[24]	Eissenstat D M, van Rees K C J. The growth and function of pine roots [J]. Ecological Bulletins, 1994, 43:76-91.
[25]	Fogel R. Root turnover and productivity of coniferous forests [J]. Plant and Soil, 1983,71:75-85.

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Contribution of Fine Root Production and Turnover to Soil Organic Carbon in Tamarix ramosissima Community in Sangong River Basin of Xinjiang, China

1. Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China

2. University of Chinese Academy of Sciences, Beijing 100049, China

3. Qingchengshan-Dujiangyan Scenic Spots Authority, Dujiangyan 611843, Sichuan, China

Received Date: 2013-09-02

Abstract: The fine root production and turnover are important parts of the terrestrial ecosystem carbon cycle, but few researches were conducted on fine root turnover and its contribution to soil carbon cycling of Tamarix ramosissima Lour. community in arid ecosystem. In this research, a typical native T. ramosissima community was selected, and the continuous soil drilling method and fine root bag method were used to investigate the monthly fine root dynamic, production and fine root turnover from May to October, 2010 (the whole growing season). The results showed that the soil water content increased with the depth of soil, while the soil organic carbon decreased. The mean fine root biomass in the community was 93.10 g·m-2 and the live fine root biomass and dead fine root biomass were 73% and 27% of total fine root biomass in the community, respectively. The dynamics of biomass and necromass of fine root in the T. ramosissima community showed the same pattern in the growing season, the biomass slightly increased from May to September, and then decreased. The fine root biomass in the community increased at first, and then reduced gradually with the increase of soil depth. The fine root biomass in 0－40 cm soil layer was the largest parts, with 88.01% of total fine root biomass for the community. The fine root decomposition rate showed a sharp decline to the minimum then declined steadily for the community, and the annual fine root decomposition rate was 51.24% for the community. 351 days and 1 359 days were needed to reach half decomposition and 95% decomposition for the community. The net productivity of fine root in the community was 118.81 g·m-2, the fine root annual turnover rate was 1.98 times·a-1, and the annual input from fine root mortality to underground soil organic carbon was 42.68 g·m-2·a-1. These results showed that the annual input from fine root turnover to underground soil organic carbon counted for only a small portion of the soil organic carbon, however, in a long time, the fine root carbon is a crucial for soil carbon pool in arid area.

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Reference (25)

[1]	Kirsi M, Heljä-Sisko H. Assessing fine-root biomass and production in a Scots pine stand-comparison of soil core and root ingrowth core methods [J]. Plant and Soil, 1999, 210:43-50.
[2]	Dietrich H, Christoph L. A comparison of four different fine root production estimates with ecosystem carbon balance data in a Fagus-Quercus mixed forest [J]. Plant and Soil, 2002, 239:237-251.
[3]	Heljä S H, John D, Pekka N, et al. Fine root biomass in relation to site and stand characteristics in Norway spruce and Scots pine stands [J]. Tree Physiology, 2007, 27:1493-1504.
[4]	Ruess R W, Hendrick R L, Burton AJ,et al. Coupling fine root dynamics with ecosystem carbon cycling in black spruce forests of interior Alaska [J]. Ecological Monographs, 2003,73: 643-662.
[5]	Finér L,Ohashi M,Noguchi K,et al. Factors causing variation in fine root biomass in forest ecosystems [J]. Forest Ecology and Management,2011, 261: 265- 277.
[6]	丁金枝, 来利明, 赵学春, 等.荒漠化对毛乌素沙地土壤呼吸及生态系统碳固持的影响[J]. 生态学报, 2011, 31( 6): 1594 -1603.
[7]	杨小林,张希明,单立山,等.塔克拉玛干沙漠腹地塔克拉玛干柽柳根系构筑型研究[J].干旱区研究, 2008, 25 (5): 660-657.
[8]	单立山, 张希明, 柴仲平, 等.多枝柽柳幼苗根系分布对灌溉量的响应[J].干旱区研究, 2007, 24( 2 ): 213 - 218.
[9]	Olson J S. Energy storage and the balance of producers and decomposition in ecological systems [J]. Ecology, 1963, 44: 332-341.
[10]	Vogt K A, Grier C C, Vogt D J. Production, turnover and nutrient dynamics of above- and below-ground detritus of world forests [J]. Advances in Ecological Research, 1986, 15: 303-377.
[11]	张小全. 环境因子对树木细根生物量、生产与周转的影响[J]. 林业科学研究, 2001, 14( 5): 566-573.
[12]	Jackson R B, Mooney H A, Schulze E D.A global budget for fine root biomass, surface area, and nutrient contents [J]. Proceedings of the National Academy of Sciences of the United States of America, 1997, 94: 7362-7366.
[13]	Jha P, Mohapatra K P. Leaf litterfall, fine root production and turnover in four major tree species of the semiarid region of India [J]. Plant and Soil, 2010, 326: 481- 491.
[14]	Marianne K, Burke, Dudley J R. Fine root growth phenology, production and turnover in a northern hardwood forest ecosystem [J]. Plant and Soil, 1994, 162:135-146.
[15]	Sutton R E.Soil properties and root development in forest trees: a review [J]. Information report O-X-413, Ministry of natural resources, Ontario, Canada, 1991.
[16]	John B, Pandey H N, Tripathi R S. Vertical distribution and seasonal changes of fine and coarse root mass in Pinus kesiya Royle ExGordon forest of three different ages [J]. Acta Oecologica, 2001, 22:293-300.
[17]	Fahey T J, Hughes J W. Fine root dynamics in a northern hardwood forest ecosystem, hubbard brook experimental forest [J]. Journal of Ecology, 1994, 82:533-548.
[18]	Santantonio D, Hermann R K, Overton W S. Root biomass studies in forest ecosystems [J]. Pedobiologia, 1977, 17:1-31.
[19]	Berg B. Plant litter: decomposition, human formation, carbon sequestration [M]. Berlin: Springer,2003.
[20]	Wieder R K, Wright S J. Tropical forest litter dynamics and season irrigation on Barro Colorado Island, Panama [J]. Ecology, 1995, 76: 1971-1979.
[21]	Eissenstat D M, Wells C E, Yanai R D, et al. Building roots in a changing environment: implications for root longevity [J]. New Phytologist, 2000,147:33-42.
[22]	Gill R A, Jackson R B. Global patterns of root turnover for terrestrial ecosystems [J]. New Phytologist, 2000, 147:13-31.
[23]	裴智琴,周勇,郑元润,等.干旱区琵琶柴群落细根周转对土壤有机碳循环的贡献[J].植物生态报,2011, 35 (11): 1182-1191.
[24]	Eissenstat D M, van Rees K C J. The growth and function of pine roots [J]. Ecological Bulletins, 1994, 43:76-91.
[25]	Fogel R. Root turnover and productivity of coniferous forests [J]. Plant and Soil, 1983,71:75-85.

Contribution of Fine Root Production and Turnover to Soil Organic Carbon in Tamarix ramosissima Community in Sangong River Basin of Xinjiang, China

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通讯作者: 陈斌, bchen63@163.com

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Contribution of Fine Root Production and Turnover to Soil Organic Carbon in Tamarix ramosissima Community in Sangong River Basin of Xinjiang, China

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