Scaling of soil carbon, nitrogen, phosphorus and C:N:P ratio patterns in peatlands of China
Scaling of soil carbon, nitrogen, phosphorus and C:N:P ratio patterns in peatlands of China
复制标题
中国泥炭地土壤碳、氮、磷和 C:N:P 比例模式的尺度化
DOI：
10.1007/s11769-017-0884-8
复制
发表时间：
2017
影响因子：
3.4
通讯作者：
Jiang Ming
中科院分区：
文献类型：
--
作者：
Zhang Zhongsheng;Xue Zhenshan;Lyu Xianguo;Tong Shouzheng;Jiang Ming
受Redfield型C：N：P比值在全球土壤中的重要性的启发，我们在泥炭地中寻找类似的模式，旨在破译潜在的影响因素。通过对1031个泥炭地土壤数据的分析，土壤有机碳（SOC）、全氮（TN）和全磷（TP）的平均含量分别为50.51%、1.45%和0.13%，C：N、C：P和N：P的平均值分别为26.72、1186.00和46.58。C：N比在不同植被覆盖度间的变异较小，空间异质性小于C：P和N：P比。中国泥炭地土壤的C：N：P比值一般为1245：47：1，但不一致。东北、西藏、若尔盖高原和新疆部分地区土壤有机碳、全氮、全磷和C：P比值较高。青海、长江下游部分地区和海岸带的TP和N：P比值较低。SOC，TN，TP，C：N，C：P和N：P比值的显着差异，观察各组主要植被分类。水分、温度和降水量与土壤有机碳、全氮、全磷及其比值密切相关。水热系数（RH）与C：N、C：P和N：P比值显著正相关，表明中国泥炭地在过去50年中可能受到气候变化的影响。
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, Zoigê 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.