黄河中下游滩区泥沙淤积对土壤化学计量比的影响

doi:10.13292/j.1000-4890.202206.006

生态学杂志 ›› 2022, Vol. 41 ›› Issue (7): 1334-1341.doi: 10.13292/j.1000-4890.202206.006

• 黄河流域生态保护与修复专栏 • 上一篇下一篇

黄河中下游滩区泥沙淤积对土壤化学计量比的影响

陈志杰^1,2,3*,肖宇童^2,3,董雄德^2,3,王唯锦⁴,王建^2,3,翟文芳⁴,田梦^2,3,韩士杰^2,3

(¹厦门大学嘉庚学院环境工程学院，福建漳州 363105；²河南省全球变化生态学国际联合实验室，河南大学生命科学学院，河南开封 475004；³河南省桃花峪黄河滩涂系统野外科学观测研究站，河南荥阳 450100；⁴河南省地质调查院，河南省地质科学研究所，河南省地下水污染防治与修复重点实验室，郑州 450000)

出版日期:2022-07-10 发布日期:2022-07-08

Effects of sediment deposition on soil stoichiometric ratios in the middle and lower reaches of the Yellow River.

CHEN Zhi-jie^1,2,3*, XIAO Yu-tong^2,3, DONG Xiong-de^2,3, WANG Wei-jin⁴, WANG Jian^2,3, ZHAI Wen-fang⁴, TIAN Meng^2,3, HAN Shi-jie^2,3

(¹Department of Environmental Science, School of Environmental Science & Engineering, Tan KahKee College, Xiamen University, Zhangzhou 363105, Fujian, China; ²International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China; ³Henan Taohuayu Field Observation and Research Station of Yellow River Floodplain Ecosystems, Henan University, Xingyang 450100, Henan, China; ⁴Henan Key Laboratory of Prevention and Remediation of Groundwater Pollution, Henan Institute of Geological Sciences, Henan Institute of Geological Survey, Zhengzhou 450000, China).

Online:2022-07-10 Published:2022-07-08

摘要/Abstract

摘要： 生态化学计量是生态系统元素循环的重要指标。然而，滩区洪水漫滩过程中的泥沙淤积差异对土壤理化性质和土壤化学计量特征的影响尚不明确。本研究在黄河中下游滩区选取季节性水淹区的3个不同位置的样地(与主河道距离由近及远分别为100、1000和1800 m)，按0～10、10～20和20～30 cm三层采集土壤样品，每个样点3次重复，分析土壤有机碳(SOC)、全碳(TC)、全氮(TN)、全磷(TP)含量以及其他土壤性质。结果表明：SOC、TC、TN和TP含量的平均值分别为3.49±0.29、15.13±0.76、0.46±0.03和0.59±0.01 g·kg^-1，C/N、C/P和N/P的平均值分别为37.14±2.40、25.38±1.17和0.78±0.06，表明研究区土壤属于严重的氮缺乏。另外，土壤C、N含量以及C/N、C/P和N/P均随着土壤深度的加深而显著降低(P<0.05)，但土壤TP含量在深度上的变化较小。土壤C、N含量及C/N、C/P和N/P值均距河道距离越远而越高(P<0.05)。主成分分析结果表明，土壤C、N、P含量高低主要与土壤粒径组成相关，且离河道距离越远含量越高，而化学计量比则与TC、TN、TP含量相关。这些结果表明，黄河中下游滩区漫滩洪水在3个样地淤积程度不同，而距河道远近差异的位置引起的淤积程度是影响滩区土壤粒径组成的主要因素，进而影响滩区土壤养分含量，从而影响滩区植物的生长发育过程。黄河中下游滩区前沿植被的泥沙截留有助于促进远离河道区域的土壤发育和植被发展。

关键词: 土壤有机碳, 黄河, 化学计量比, 漫滩湿地

Abstract: Stoichiometry is an essential indicator of ecosystem nutrient cycling. However, the effects of floodinduced sediment deposition on soil physicochemical properties and soil stoichiometric relationships remain unclear. In this study, three sites (100 m, 1000 m, and 1800 m to the main channel) of floodplain with three replications were selected in the middle and lower reaches of the Yellow River. Soil samples at depths of 0-10 cm, 10-20 cm, and 20-30 cm were collected to analyze the concentrations of soil organic carbon (SOC), total carbon (TC), total nitrogen (TN), total phosphorous (TP), and other soil properties. The results showed that SOC, TC, TN and TP contents were 3.49±0.29, 15.13±0.76, 0.46±0.03 and 0.59±0.01 g·kg^-1, respectively, and C/N, C/P, and N/P were 37.14±2.40, 25.38±1.17 and 0.78±0.06, respectively, indicating that the soil in the study area was under seriously nitrogen limitation. In addition, the contents of soil C, N and the ratios of C/N, C/P, N/P significantly decreased with soil depth (P<0.05), but the variation of soil TP content was minor. In contrast, the contents of soil C, N and the ratios of C/N, C/P, N/P significantly increased with the distance from the river (P<0.05). The results of the principal component analysis showed that the higher contents of C, N, and P in the soil occurred in the farther site from the river, which were mainly related to soil particle size composition. The stoichiometric ratios were related to the contents of C, N, and P. These results suggest that the floodplain floods in the middle and lower reaches of the Yellow River have different siltation degrees in the three sites. The degree of siltation caused by the distance from the river channel was the main factor affecting soil particle size composition. The different distances to the river affected soil particle size composition resulting in the variation of soil nutrient condition and thus affecting plant growth in floodplain. The sediment interception of the front vegetation in the middle and lower reaches of the Yellow River is helpful to soil nutrient retention and vegetation development in the site far from the river course.

Key words: soil organic carbon, Yellow River, stoichiometry, floodplain.

陈志杰, 肖宇童, 董雄德, 王唯锦, 王建, 翟文芳, 田梦, 韩士杰. 黄河中下游滩区泥沙淤积对土壤化学计量比的影响[J]. 生态学杂志, 2022, 41(7): 1334-1341.

CHEN Zhi-jie, XIAO Yu-tong, DONG Xiong-de, WANG Wei-jin, WANG Jian, ZHAI Wen-fang, TIAN Meng, HAN Shi-jie. Effects of sediment deposition on soil stoichiometric ratios in the middle and lower reaches of the Yellow River.[J]. Chinese Journal of Ecology, 2022, 41(7): 1334-1341.

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黄河中下游滩区泥沙淤积对土壤化学计量比的影响

Effects of sediment deposition on soil stoichiometric ratios in the middle and lower reaches of the Yellow River.

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