不同修复处理对呼伦贝尔放牧地植被群落特征 及土壤碳氮养分的影响
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作者单位:

(1.北方干旱半干旱耕地高效利用全国重点实验室/ 中国农业科学院农业资源与农业区划研究所/ 内蒙古呼伦贝尔草原生态系统国家野外科学观测研究站,北京 100081;2.内蒙古农业大学草原与资源环境学院,内蒙古 呼和浩特 010011;3.国际生物多样性中心东亚办事处,北京 100081)

作者简介:

郅丽(1996-),硕士研究生,主要从事草原生态研究。E-mail:82101232101@caas.cn。

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基金项目:

基金项目:中国农业科学院基本科研业务费专项(1610132024003);国际生物多样性中心项目(L24ROM179);呼伦贝尔科技计划项目(SF2023007);中央引导地方科技发展资金(2025ZY0018);农业科技创新联盟建设- 农业基础性长期性科技工作(NAES037SQ18)。


Response of pasture vegetation communities and soil carbon and nitrogen in Hulunbuir to different restoration measures
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(1.National Key Laboratory for Efficient Utilization of Arid and Semi-arid Farmland in Northern China/Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences/National Field Scientific Observation and Research Station for Grassland Ecosystem in Hulunbuir,Inner Mongolia,Beijing 100081;2.College of Grassland and Resource Environment,Inner Mongolia Agricultural University,Hohhot Inner Mongolia 010011;3.East Asia office of Bioversity International,Beijing 100081)

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    摘要:

    为改善放牧地退化生产力下降的问题,对放牧地采用围栏封育、施用农家肥、机械打孔等修复手段。探讨在采取不同的修复方式下,草地植被群落和土壤养分的响应模式,并进一步对比分析这些处理的实施效果。本研究以内蒙古自治区呼伦贝尔市陈巴尔虎旗的退化放牧地为试验场地,于2023 年进行以下4 种处理:对照(CK)、围栏封育(WF)、施用农家肥(NJF)、机械打孔+ 施用农家肥(DNJF)。同年8 月,进行了植物与土壤调查,以评估短期内修复效果对植物群落特征、生物多样性和土壤碳氮养分的影响。在WF、NJF、DNJF 修复处理后,植被的盖度、密度及地上生物量均显著高于CK,NJF 处理对地上生物量提升效果尤为显著(P<0.05),较CK 提升了110.6%;3 种修复处理均有效增强了退化放牧地的植物多样性,WF 处理的多样性提升最为显著;所有修复处理均促进了多年生禾草的生长,NJF 处理通过提升C4 植物的综合优势比,增强植物群落的光利用效率;DNJF 处理对放牧地土壤有机碳含量和全氮含量的提升作用优于WF 和NJF 处理,使0 ~ 15 cm 土层中土壤有机碳含量提升至17.62 g/kg,较CK 增加了29.64%;相关性分析结果表明,DNJF 处理能够增强植被群落与土壤养分之间的正相关性。围栏封育、施用农家肥、机械打孔+ 施用农家肥这3 种方法对退化放牧地均有良好的修复作用。围栏封育显著增强了植物多样性,施用农家肥显著提高了草地生产力,而机械打孔则有效提升了土壤环境。综合分析,机械打孔配施用农家肥的修复策略对退化放牧地的可持续利用最为有效。

    Abstract:

    In order to improve the phenomenon of pasture degradation,fencing and sealing,application of farmyard manure,mechanical perforation and other means of restoration have been adopted for grazing land.The response patterns of grassland vegetation communities and soil nutrients were explored under the adoption of different restoration methods,and the effects of the implementation of these measures were further compared and analysed.This study used the degraded pasture in Chenbalhu banner,Hulunbeier city,Inner Mongolia autonomous region as the experimental site,and the following four measures were carried out in 2023:control(CK),fencing(WF),farmyard manure(NJF),mechanical aerator + farmyard manure(DNJF).In August 2023,plant and soil surveys were conducted to assess the effects of short-term restoration effects on plant community characteristics,biodiversity and soil carbon and nitrogen nutrients.Under WF,NJF and DNJF treatments,the vegetation cover,density and aboveground biomass were significantly higher than that of CK,and the enhancement effect of community height and aboveground biomass of NJF treatment was particularly significan(t P<0.05),with a 110.6% increase compared to the CK.WF,NJF and DNJF treatments effectively enhanced the plant diversity of the degraded grazing land,and the diversity enhancement of WF treatment was the most significant.All restoration treatments promoted the growth of perennial grasses,and NJF treatment elevated the aboveground biomass of the C4 plants,thus enhancing the light use efficiency of the vegetation community.DNJF treatment had a better effect on increasing soil organic carbon and total nitrogen content in grazing land than WF and NJF treatments.The soil organic carbon content in the 0-15 cm of DNJF treatment was 17.62 g/kg,with an increase of 29.64%,compared to CK.The correlation analysis results indicated that DNJF treatment enhanced the positive correlation between vegetation communities and soil nutrients.The three methods of fencing,farmyard manure and mechanical perforation + application of farmyard manure all had significant restoration effects on degraded pasture.Fencing significantly enhanced plant diversity,application of farmyard manure significantly increased grassland productivity,and mechanical aerator effectively improved soil fertility.In a comprehensive analysis,mechanical aerator + farmyard manure was the most effective for the sustainable use of degraded grazing land.

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郅丽,俞天琦,李颖,张智涛,侍梦圆,闫瑞瑞,白可喻.不同修复处理对呼伦贝尔放牧地植被群落特征 及土壤碳氮养分的影响[J].中国土壤与肥料123,2025,(8):171-181

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  • 收稿日期:2024-11-27
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  • 录用日期:2025-04-20
  • 在线发布日期: 2025-10-11
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