Temperature sensitivity of nutrient release from dung along elevation gradient on the Qinghai-Tibetan plateau

NWIPB OpenIR

	Temperature sensitivity of nutrient release from dung along elevation gradient on the Qinghai-Tibetan plateau
	Xu, Guangping ; Chao, Zengguo ; Wang, Shiping ; Hu, Yigang ; Zhang, Zhenghua ; Duan, Jichuang ; Chang, Xiaofeng ; Su, Ailing ; Luo, Caiyun ; Li, Yingnian ; Du, Mingyuan
	2010-05-01
发表期刊	NUTRIENT CYCLING IN AGROECOSYSTEMS ; Xu, GP; Chao, ZG; Wang, SP; Hu, YG; Zhang, ZG; Duan, JC; Chang, XF; Su, AL; Luo, CY; Li, YN; Du, MY.Temperature sensitivity of nutrient release from dung along elevation gradient on the Qinghai-Tibetan plateau,NUTRIENT CYCLING IN AGROECOSYSTEMS,2010,87(1):49-57
摘要	The temperature sensitivity of nutrient release from dung decomposition will influence ecosystem nutrient recycling in the future global warming. However, the relationship between temperature and nutrient release is not well understood. We conducted a 2-year-long study to understand the yak dung decomposition and its potential response to climate change along an elevation gradient from 3,200 to 4,200 m above sea level on an alpine meadow on the Qinghai-Tibetan plateau. Mass loss of different chemical components of dung [organic carbon (C), cellulose, hemicellulose, lignin, N, P, potassium (K), calcium (Ca) and magnesium (Mg)] significantly decreased with elevation. The ratios of C:N and N:P in the remaining dung increased significantly with decrease in elevation. The average temperature sensitivities (% A degrees C(-1)) (i.e., increase of the mass loss (%) per 1A degrees C temperature increase among elevations) were approximately 37, 75, 168, 41, 29, 37, 29, 34, and 31% per 1A degrees C warming within a 273-day decomposition period, which decreased with decomposition time, for organic C, cellulose, hemicellulose, lignin, N, P, K, Ca, and Mg, respectively. The temperature sensitivity of organic C mass loss is positively correlated to the C:N ratios in dung. The average temperature sensitivity of phosphorus mass loss was higher than that of nitrogen mass loss for the first 273 days and thereafter this situation was reversed.; The temperature sensitivity of nutrient release from dung decomposition will influence ecosystem nutrient recycling in the future global warming. However, the relationship between temperature and nutrient release is not well understood. We conducted a 2-year-long study to understand the yak dung decomposition and its potential response to climate change along an elevation gradient from 3,200 to 4,200 m above sea level on an alpine meadow on the Qinghai-Tibetan plateau. Mass loss of different chemical components of dung [organic carbon (C), cellulose, hemicellulose, lignin, N, P, potassium (K), calcium (Ca) and magnesium (Mg)] significantly decreased with elevation. The ratios of C:N and N:P in the remaining dung increased significantly with decrease in elevation. The average temperature sensitivities (% A degrees C(-1)) (i.e., increase of the mass loss (%) per 1A degrees C temperature increase among elevations) were approximately 37, 75, 168, 41, 29, 37, 29, 34, and 31% per 1A degrees C warming within a 273-day decomposition period, which decreased with decomposition time, for organic C, cellulose, hemicellulose, lignin, N, P, K, Ca, and Mg, respectively. The temperature sensitivity of organic C mass loss is positively correlated to the C:N ratios in dung. The average temperature sensitivity of phosphorus mass loss was higher than that of nitrogen mass loss for the first 273 days and thereafter this situation was reversed.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/25627
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Xu, Guangping,Chao, Zengguo,Wang, Shiping,et al. Temperature sensitivity of nutrient release from dung along elevation gradient on the Qinghai-Tibetan plateau[J]. NUTRIENT CYCLING IN AGROECOSYSTEMS, Xu, GP; Chao, ZG; Wang, SP; Hu, YG; Zhang, ZG; Duan, JC; Chang, XF; Su, AL; Luo, CY; Li, YN; Du, MY.Temperature sensitivity of nutrient release from dung along elevation gradient on the Qinghai-Tibetan plateau,NUTRIENT CYCLING IN AGROECOSYSTEMS,2010,87(1):49-57,2010.
APA	Xu, Guangping.,Chao, Zengguo.,Wang, Shiping.,Hu, Yigang.,Zhang, Zhenghua.,...&Du, Mingyuan.(2010).Temperature sensitivity of nutrient release from dung along elevation gradient on the Qinghai-Tibetan plateau.NUTRIENT CYCLING IN AGROECOSYSTEMS.
MLA	Xu, Guangping,et al."Temperature sensitivity of nutrient release from dung along elevation gradient on the Qinghai-Tibetan plateau".NUTRIENT CYCLING IN AGROECOSYSTEMS (2010).