Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (10): 3628-3641.DOI: 10.11733/j.issn.1007-0435.2026.10.010

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Effects of Autumn and Winter Mowing on Vegetation, Soil, and Bacterial Community Characteristics in Artificially Seeded Grasslands in the Muli Mining Area

WU Yong1,2, LI Xi-lai1,2, ZHOU Yi-zhi1,2, MA Jing-juan1,2, DING Bei-qiao1,2   

  1. 1. College of Forestry and Grassland, Qinghai University, Xining, Qinghai Province 810016, China;
    2. State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai Province 810016, China
  • Received:2026-01-07 Revised:2026-03-09 Published:2026-10-10

秋冬季刈割对木里矿区人工草地植被、土壤及细菌群落特征的影响

吴勇1,2, 李希来1,2, 周怡志1,2, 马婧娟1,2, 丁北桥1,2   

  1. 1. 青海大学林草学院, 青海 西宁 810016;
    2. 青海大学省部共建三江源生态与高原农牧业国家重点实验室, 青海 西宁 810016
  • 通讯作者: 李希来, E-mail: xilai-li@163.com
  • 作者简介:吴勇(1994-),男,汉族,博士研究生,主要从事高寒矿区生态恢复研究,E-mail:1196440850@qq.com
  • 基金资助:
    中央林业改革发展资金天峻县木里矿区种草复绿区合理利用试验研究项目(E6301000076043631001001);2025年度青海木里矿区草地及遥感监测项目;高等学校学科创新引智计划项目(D18013)资助

Abstract: To investigate the responses of vegetation, soil, and soil bacterial community characteristics in artificially seeded grasslands in the Muli Mining Area to autumn and winter mowing, this study established two treatments: autumn mowing and winter mowing. We analyzed the effects of autumn and winter mowing on vegetation community characteristics, soil physicochemical properties, bacterial community structure, and their interrelationships. The results showed that winter mowing significantly increased vegetation height, cover, the number of reproductive shoots, and aboveground biomass in the artificially seeded grasslands. It also significantly increased the contents of soil available nitrogen and soil available phosphorus(P<0.05). Specifically, aboveground biomass increased by 48.02% and 22.03% compared to the control and autumn mowing treatments, respectively. In contrast, autumn mowing significantly decreased soil water content (P<0.05). Both autumn and winter mowing had no significant effect on bacterial community diversity; however, autumn mowing significantly increased the abundance of Gemmatimonadota (P<0.05). Redundancy analysis (RDA) indicated that soil total nitrogen and organic carbon were the primary factors influencing the dominant bacterial phyla in the artificially seeded grasslands of the Muli Mining Area. In conclusion, for artificially seeded grasslands in the early stage of restoration in the Muli Mining Area, winter mowing was more conducive to sustainable restoration.

Key words: Alpine mining area, Artificially seeded grasslands, Seasonal mowing, Vegetation community, Soil physicochemical properties, Soil bacterial community structure

摘要: 为探讨木里矿区人工草地植被、土壤及土壤细菌群落特征对秋季刈割和冬季刈割的响应,本研究以木里矿区人工草地为研究对象,设置秋季与冬季刈割两个处理,分析秋季和冬季刈割对植被群落特征、土壤理化性质、细菌群落结构及其相互关系的影响。结果表明:冬季刈割显著提高了木里矿区人工草地植被的高度、盖度、生殖枝数和地上生物量,显著增加了土壤碱解氮和速效磷含量(P<0.05),其中地上生物量相比对照和秋季刈割分别增加48.02%和22.03%;秋季刈割显著降低了土壤含水量(P<0.05)。秋季和冬季刈割未对细菌群落多样性产生显著影响,秋季刈割显著增加了芽单胞菌门的丰度(P<0.05)。RDA分析表明,土壤全氮和有机碳是木里矿区人工草地土壤细菌优势菌门的主要影响因子。综上,对于恢复初期阶段的木里矿区人工草地来说,冬季刈割更有利于人工草地可持续恢复。

关键词: 高寒矿区, 人工草地, 冬季和秋季刈割, 植被群落, 土壤理化特征, 细菌群落结构

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