Effects of Rest Grazing on Organic Carbon Storage in Stipa grandis Steppe in Inner Mongolia, China

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	Effects of Rest Grazing on Organic Carbon Storage in Stipa grandis Steppe in Inner Mongolia, China
	Li Yujie 1; Zhu Yan 1; Zhao Jianning 1; Li Gang 1; Wang Hui 1; Lai Xin 1; Yang Dianlin 1
刊名	JOURNAL OF INTEGRATIVE AGRICULTURE
	2014
卷号	13 期号:3 页码:624-634
关键词	TYPICAL STEPPE SOIL GRASSLAND SEQUESTRATION ECOSYSTEM BIOMASS VEGETATION QUALITY MATTER CO2 rest grazing Stipa grandis steppe organic carbon density organic carbon storage carbon sequestration benefits
ISSN号	2095-3119
其他题名	Effects of Rest Grazing on Organic Carbon Storage in Stipa grandis Steppe in Inner Mongolia, China
英文摘要	This study was aimed to evaluate the potential effects of rest grazing on organic carbon storage in Stipa grandis steppe of Inner Mongolia, China. Using potassium dichromate heating method, we analyzed the organic carbon storage of plant and soil in Stipa grandis steppe after rest grazing for 3, 6, and 9 yr. The results indicated that as the rest grazing ages prolonged, the biomass of aboveground parts, litter and belowground plant parts (roots) of the plant communities all increased, meanwhile the C content of the biomass increased with the rest grazing ages prolonging. For RG(0), RG(3a), RG(6a), and RG(9a), C storage in aboveground vegetation were 60.7, 76.9, 82.8 and 122.2 g C m(-2), respectively; C storage of litter were 5.1, 5.8, 20.4 and 25.5 g C m(-2), respectively; C storage of belowground roots (0-100 cm) were 475.2, 663.0, 1115.0 and 1867.3 g C m(-2), respectively; C storage in 0-100 cm soil were 13.97, 15.76, 18.60 and 32.41 kg C m(-2), respectively. As the'rest grazing ages prolonged, the organic C storage in plant communities and soil increased. The C storage of belowground roots and soil organic C was mainly concentrated in 0-40 cm soil body. The increased soil organic C for RG(3a) accounted for 89.8% of the increased carbon in vegetation-soil system, 87.2% for RG(6a), and 92.6% for RG(9a). From the perspective of C sequestration cost, total cost for RG(3a), RG(6a), and RG(9a) were 2 903.4, 5806.8 and 8710.2 CNY ha(-1), respectively. The cost reduced with the extension of rest grazing ages, 0.15 CNY kg(-1) C for RG(3a), 0.11 CNY kg(-1) C for RG(6a) and 0.04 CNY kg(-1) C for RG(9a). From the growth characteristics of grassland plants, the spring was one of the two avoided grazing periods, timely rest grazing could effectively restore and update grassland vegetation, and was beneficial to the sustainable use of grassland. Organic C storage for RG(9a) was the highest, while the cost of C sequestration was the lowest. Therefore, spring rest grazing should be encouraged because it was proved to be a very efficient grassland use pattern.
资助项目	[National Natural Science Foundation of China] ; [Key Technologies R&D Program of China]
语种	英语
CSCD记录号	CSCD:5097633
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/147667]
专题	金属研究所_中国科学院金属研究所
作者单位	1.中国科学院亚热带农业生态研究所 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Li Yujie,Zhu Yan,Zhao Jianning,et al. Effects of Rest Grazing on Organic Carbon Storage in Stipa grandis Steppe in Inner Mongolia, China[J]. JOURNAL OF INTEGRATIVE AGRICULTURE,2014,13(3):624-634.
APA	Li Yujie.,Zhu Yan.,Zhao Jianning.,Li Gang.,Wang Hui.,...&Yang Dianlin.(2014).Effects of Rest Grazing on Organic Carbon Storage in Stipa grandis Steppe in Inner Mongolia, China.JOURNAL OF INTEGRATIVE AGRICULTURE,13(3),624-634.
MLA	Li Yujie,et al."Effects of Rest Grazing on Organic Carbon Storage in Stipa grandis Steppe in Inner Mongolia, China".JOURNAL OF INTEGRATIVE AGRICULTURE 13.3(2014):624-634.