Effects of Snow Cover Reduction and Nitrogen Addition on Soil Bacterial Communities in Degraded Sandy Wasteland in North China

doi:10.11733/j.issn.1007-0435.2025.12.002

Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (12): 3874-3884.DOI: 10.11733/j.issn.1007-0435.2025.12.002

• 2025-12-28 • Previous Articles

Effects of Snow Cover Reduction and Nitrogen Addition on Soil Bacterial Communities in Degraded Sandy Wasteland in North China

XU Heng-kang¹, FU Yao^1,2, CHEN Chao¹, PANG Zhuo¹, ZHANG Guo-fang¹, ZHANG Wei-wei¹, LU Hui³, SUN Xin-bo², KAN Hai-ming¹

1. Institute of Grassland, Flower and Landscape Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China;
2. College of Agronomy, Hebei Agricultural University, Baoding, Hebei Province 071000, China;
3. College of Grassland, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China

Received:2025-01-02 Revised:2025-05-14 Published:2025-12-01

积雪减少和氮添加对华北退化沙荒地土壤细菌群落结构多样性及网络拓扑结构的影响

徐恒康¹, 付尧^1,2, 陈超¹, 庞卓¹, 张国芳¹, 张微微¹, 逯辉³, 孙鑫博², 阚海明¹

1. 北京市农林科学院草业花卉与景观生态研究所, 北京 100097;
2. 河北农业大学农学院, 河北保定 071000;
3. 新疆农业大学草业学院, 新疆乌鲁木齐 830052

通讯作者: 徐恒康，E-mail：xuhengk@163.com；阚海明，E-mail：kanhaiming@hotmail.com
作者简介:徐恒康（1995-），男，回族，河南南阳人，博士，主要从事草地生态与管理研究，E-mail：xuhengk@163.com；付尧（2000-），女，汉族，河北邯郸人，硕士研究生，主要从事草地生态与牧草混播研究，E-mail：504603834@qq.com；
基金资助:
北京市农林科学院青年科研基金项目（QNJJ202333）；北京市农林科学院科技创新能力建设专项（KJCX20230406；KJCX20230305；KJCX20230220；KJCX20240319）资助

Abstract

Abstract: Global climate change had reduced snowpack and increased nitrogen （N） deposition， jointly threatening northern ecosystems. In this study， we investigated the short-term （1-year） effects of snow cover/ removal and N addition （50 kg·ha^-¹）/ no addition （two-factor field experiment， 4 treatments × 4 replicates） on soil bacterial community structure， diversity， and network stability in a degraded sandy wasteland in North China. The results showed that N addition （CKN1） significantly increased soil nitrate nitrogen （NO₃^--N）（P<0.05）， microbial biomass carbon （MBC）（P<0.05）， and notably elevated the Sobs index of the bacterial community （P<0.01）. Conversely， snow removal （S0N0） significantly decreased MBC （P<0.01）. Redundancy analysis （RDA） identified NO₃^--N， ammonium nitrogen （NH??-N）， and available potassium （AK） as key drivers of community structural changes， with Methylomirabilota and NB1-j relative abundance showing significant positive correlations with NO₃^--N （P<0.01）. Molecular ecological network analysis revealed that both N addition and snow removal enhanced network complexity. Therefore， snow reduction and N deposition synergistically affect soil microbial community structure and network stability by regulating key environmental factors， providing a scientific basis for ecological restoration of sandy wastelands.

Key words: Changes in snowfall, Microbial diversity, Soil physical and chemical properties, Soil bacterial community structure, Molecular ecological network

摘要： 全球气候变化导致积雪减少与氮沉降加剧，共同威胁北方生态系统。本研究以华北退化沙荒地为对象，通过积雪覆盖/除雪和施氮（50 kg·ha^-1）/不施氮双因子野外控制试验（4处理×4重复），探究短期（1年）复合处理对土壤细菌群落结构、多样性及网络稳定性的影响。结果表明：施氮处理（CKN1）显著提高土壤硝态氮（P<0.05）和微生物生物量碳（MBC）含量（P<0.05），细菌群落Sobs指数显著增加13%；除雪处理（S0N0）显著降低MBC含量（P<0.01）。冗余分析（RDA）揭示硝态氮（NO₃^--N）、铵态氮（NH??-N）和速效钾（AK）是驱动群落结构变化的关键因子，其中Methylomirabilota和NB1-j相对丰度与NO₃^--N显著正相关（P<0.01）。分子生态网络分析表明，施氮与除雪处理均提升了网络复杂性。综上，积雪减少与氮沉降通过调控关键环境因子协同影响土壤微生物群落结构与网络稳定性，本研究为沙荒地生态修复提供了科学依据。

关键词: 降雪变化, 微生物多样性, 土壤理化性质, 土壤细菌群落结构, 分子生态网络

CLC Number:

S154.2

XU Heng-kang, FU Yao, CHEN Chao, PANG Zhuo, ZHANG Guo-fang, ZHANG Wei-wei, LU Hui, SUN Xin-bo, KAN Hai-ming. Effects of Snow Cover Reduction and Nitrogen Addition on Soil Bacterial Communities in Degraded Sandy Wasteland in North China[J]. Acta Agrestia Sinica, 2025, 33(12): 3874-3884.

徐恒康, 付尧, 陈超, 庞卓, 张国芳, 张微微, 逯辉, 孙鑫博, 阚海明. 积雪减少和氮添加对华北退化沙荒地土壤细菌群落结构多样性及网络拓扑结构的影响[J]. 草地学报, 2025, 33(12): 3874-3884.

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Effects of Snow Cover Reduction and Nitrogen Addition on Soil Bacterial Communities in Degraded Sandy Wasteland in North China

积雪减少和氮添加对华北退化沙荒地土壤细菌群落结构多样性及网络拓扑结构的影响

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[1]	LI Jia-li, WANG Xing, WANG Juan, MIAO Chun-qin, WANG Tuo-he, GUAN Cheng-ping, JIA Gai-xiu, WU Gang, HU Hai-yan, CHEN Xiao-jun. Effects of Compound Microbial Agents Combined with Fertilizers Application on Maize continuous cropping Yield and Rhizosphere Bacterial Community [J]. Acta Agrestia Sinica, 2025, 33(9): 3108-3117.
[2]	LI Yan-chun, LI Qiang-feng, LI Wei, PENGMAO Dang-zhi, LYU Jia. Study on Soil Microbial Community Diversity of Typical Plant Communities in the Qaidam Haloxylon Ecosystem Reserve [J]. Acta Agrestia Sinica, 2025, 33(7): 2227-2237.
[3]	ZHOU Yi-zhi, LI Xi-lai, YAO Wen-zhi, LI Jun-xi, WU Yong, ZHANG Xu-tian, QI Yu-juan. Effects of Natural Wildfires on Soil Organic Carbon Components in Alpine Marsh Wetland [J]. Acta Agrestia Sinica, 2025, 33(6): 1771-1781.
[4]	ZHAO Jia-jie, JIA Yu-shan, WANG Zhi-jun, DU Shuai, HAO Jun-feng, GE Gen-tu. Progress Study on the Effects of Lactobacillus buchneri on Silage Quality based on Meta-Analysis [J]. Acta Agrestia Sinica, 2025, 33(3): 665-677.
[5]	XU Long-chao, LI Shao-yu, BAI Mei, ZHANG Feng, ZHANG Bin, YANG Li-shan, WANG Wen-qiong, XING Jia-qing, WU Yun-ga, ZHAO Meng-li. Study on the Changes of Nitrogen and Phosphorus Contents in Leaves of Different Types of Grassland Plant Communities in Inner Mongolia [J]. Acta Agrestia Sinica, 2025, 33(2): 465-471.
[6]	GAO Han-sen, YIN Ya-li, ZHAO Wen, LIU Jing-jing, LI Shi-xiong. Effects of Monoculture and Mixed Sowing on Soil Fungal Community Characteristics in Degraded Grasslands [J]. Acta Agrestia Sinica, 2025, 33(10): 3205-3214.
[7]	LIU Hai-qiang, LI Shi-xiong, ZHAO Wen, LIU Jing-jing, XU Hai-feng, YIN Ya-li. Effects of No-tillage Reseeding on Community Characteristics of Vegetation and Microorganisms in Moderately Degraded Alpine Meadows [J]. Acta Agrestia Sinica, 2025, 33(10): 3280-3290.
[8]	GAO Yu, YAO Kang-yu, ZHAI Mei-yan, ABUDULI Subinuer, SONG Lin-hai, YANG Min, SHAO Wei, YANG Liang, REN Wan-ping. Effects of Different Moisture Contents and Compaction Densities on the Nutritional Composition,Fermentation Quality,and Microbial Diversity of High-moisture Corn Grain Silage [J]. Acta Agrestia Sinica, 2025, 33(10): 3455-3468.
[9]	CHEN Wei-hao, ZHANG Guo-rui, XU Yu-dan, YANG Wei-ke, LI Jia-cheng, LI Shuai, YAN Shi-jie, ZHAO Xiang. Effects of Disturbance on Plants, Soils, and Microorganisms in Subalpine Meadows and Frost Mounds [J]. Acta Agrestia Sinica, 2025, 33(1): 107-118.
[10]	XU Wen-yin, MA Yun-qiao, CHAI Yu, DUAN Cheng-wei, BA Yi-chen, ZHANG Jing, LI Xi-lai. Effects of Commercial Organic Fertilizers on Soil Characteristics in Different Slope Aspects of a Degraded Alpine Meadow [J]. Acta Agrestia Sinica, 2024, 32(8): 2638-2647.
[11]	HUANG Nai-xin, LI Xue-feng, ZHAN Xiao-xia, CUI Zhi-hai, MAO Kai, CHAI Huan, WANG Mu-sen, WANG Jian. Effects of Moisture Content on the Fermentation Quality and Microbial Community Diversity of Stylo Silage [J]. Acta Agrestia Sinica, 2024, 32(8): 2648-2658.
[12]	WEI Yin-zhu, LI Jia-hong, SUN Xue-tong, LIU Jie-lin, XIAO Hui-chuan, LI Hao-tian, FU Chu-han, SONG Xue, ZHANG Qiang, QIN Li-gang. Analysis of Soil Physical and Chemical Properties and Ion Variation Rule of Saline-alkali Degraded Grassland in Songnen [J]. Acta Agrestia Sinica, 2024, 32(6): 1702-1709.
[13]	TAN Hua, JIN Xu-mei, CAI Ming-ming, CHEN Hui-min, CHEN Jia-xuan, LONG Ming-xiu. Effects of Cover Crops on Soil Physical and Chemical Properties and Bacterial Communities in Organic Kiwifruit Orchards in Guanzhong Area of China [J]. Acta Agrestia Sinica, 2024, 32(3): 667-676.
[14]	TIE Xiao-long, ZHANG Ying, MA Lin-xiong, DAO Ri-na, WANG Yan, LEI Sheng-yan. Study on the Functional Diversity of PGPR Strains in Oat Rhizosphere in Sanjiangyuan Region [J]. Acta Agrestia Sinica, 2024, 32(3): 693-702.
[15]	CHI Xiao-xue, JI Yan-hua, GE Ge, WEi Hong, HE Bing-rong, GUO Si-qun. Effects of Fertilization on the Community Characteristics and Soil Physicochemical Properties of Saline Alkali Grassland [J]. Acta Agrestia Sinica, 2024, 32(12): 3915-3923.