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Title: Scaling of soil carbon, nitrogen, phosphorus and C:N:P ratio patterns in peatlands of China
Author: Z. S. Zhang, Z. S. Xue, X. G. Lyu, S. Z. Tong and M. Jiang
Corresponding Author: 薛振山
Source: Chinese Geographical Science
Issued Date: 2017
DOI: 10.1007/s11769-017-0884-8
Volume: 27, Issue:4, Pages:507-515
Abstract: Inspired by the importance of Redfield-type C : N : P ratios in global soils, we looked for analogous patterns in peatlands and aimed at deciphering the potential affecting factors. By analyzing a suite of peatlands soil data (n = 1031), mean soil organic carbon (SOC), total nitrogen (TN) and total phosphorous (TP) contents were 50.51%, 1.45% and 0.13%, respectively, while average C : N, C : P and N : P ratios were 26.72, 1186.00 and 46.58, respectively. C : N ratios showed smaller variations across different vegetation coverage and had less spatial heterogeneity than C : P and N:P ratios. No consistent C : N : P ratio, though with a general value of 1245 : 47 : 1, was found for entire peatland soils in China. The Northeast China, Tibet, Zoig Plateau and parts of Xinjiang had high soil SOC, TN, TP, and C:P ratio. Qinghai, parts of the lower reaches of the Yangtze River, and the coast zones have low TP and N : P ratio. Significant differences for SOC, TN, TP, C : N, C : P and N : P ratios were observed across groups categorized by predominant vegetation. Moisture, temperature and precipitation all closely related to SOC, TN, TP and their pairwise ratios. The hydrothermal coefficient (RH), defined as annual average precipitation divided by temperature, positively and significantly related to C : N, C : P and N : P ratios, implying that ongoing climate change may prejudice peatlands as carbon sinks during the past 50 years in China.
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Content Type: 期刊论文
URI: http://ir.iga.ac.cn/handle/131322/7651
Appears in Collections:湿地与全球变化学科组_期刊论文

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