Acta Agrestia Sinica

Acta Agrestia Sinica ›› 2024, Vol. 32 ›› Issue (10): 3133-3140.DOI: 10.11733/j.issn.1007-0435.2024.10.013

Previous Articles    

Effects of Years of Fallow on Plant Community and Soil Stoichiometric Characteristics in Gravel-mulched Farmland

CUI Lu-yao1,2,3,4, QIU Kai-yang1,2,3,4, WANG Jian-yu1, QIU Ai-zhen5, XIE Ying-zhong1,2,3,4   

  1. 1. College of Forestry and Prataculture, Ningxia University, Yinchuan, Ningxia Province 750021, China;
    2. Ningxia Grassland and Animal Husbandry Engineering Technology Research Center, Yinchuan, Ningxia Province 750021, China;
    3. Key Laboratory for Model Innovation in Forage Production Efficiency, Ministry of Agriculture and Rural Affairs, P. R. China, Ningxia University, Yinchuan, Ningxia Province 750021, China;
    4. Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Yinchuan, Ningxia Province 750021, China;
    5. School of Petrochemical Engineering, Hunan Petrochemical Vocational and Technical College, Yueyang, Hunan Province 414000, China
  • Received:2024-01-25 Revised:2024-04-25 Published:2024-11-04

退耕年限对压砂地植物群落及土壤化学计量特征的影响

崔璐瑶1,2,3,4, 邱开阳1,2,3,4, 王建宇1, 邱爱珍5, 谢应忠1,2,3,4   

  1. 1. 宁夏大学林业与草业学院, 宁夏 银川 750021;
    2. 宁夏草牧业工程技术研究中心, 宁夏银川 750021;
    3. 农业农村部饲草高效生产模式创新重点实验室, 宁夏 银川 750021;
    4. 宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地, 宁夏 银川 750021;
    5. 湖南石油化工职业技术学院石化工程学院, 湖南 岳阳 414000
  • 通讯作者: 邱开阳,E-mail:kaiyangqiu@nxu.edu.cn;王建宇,E-mail:w305y517@nxu.edu.cn
  • 作者简介:崔璐瑶(1997-)，女，汉族，内蒙古巴彦淖尔人，硕士研究生，主要从事草地生态与管理研究，E-mail：bxy25900@126.com
  • 基金资助:
    宁夏自然科学基金项目(2022AAC03082)资助

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Abstract: Due to continuous farming,the soil quality,vegetation type,and ecological environment of sandy farmland in Ningxia have been severely damaged and fragmented. To explore the effects of cropping duration on vegetation and soil characteristics,in this study we focused on sandy farmland with different cropping restoration periods in the central arid zone of Ningxia. By analyzing the plant community structure and soil ecological stoichiometry characteristics during the restoration process,we elucidated the effects of cropping duration on plant community and soil ecological stoichiometry characteristics,and clarified the interaction between plants and soil during the cropping restoration process. It was found that there were significant differences (P<0.05) in the characteristics of plant communities in different years of fallow,and the Shannon-Wiener diversity index and Pielou evenness index showed a gradual increase,while the Margalef richness index showed a gradual decrease. The stoichiometric characteristics of soils in different years of fallow showed significant differences (P<0.05),and the content of organic carbon was the highest in 20 a of returning,and the lowest at 10 a. The total nitrogen and total phosphorus content showed a fluctuating increasing trend. There was a significant correlation (P<0.05) between different fallow years,plant community characteristics and soil nutrient content. Therefore,it is recommended that appropriate additional fertilizers should be applied to sand suppression sites with different years of fallow restoration in order to accelerate the promotion of plant community structure reconstruction and biodiversity restoration.

Key words: Compressed sand land, Vegetation community characteristics, Soil chemometric characteristics

摘要： 宁夏压砂地由于长年连作，土壤质量降低，植被类型单一、稀疏，生态破坏严重，生境破碎。本研究以宁夏中部干旱带不同退耕年限压砂地为研究对象，通过分析退耕恢复过程中植物群落结构及土壤生态化学计量特征，阐明退耕年限对植物群落及土壤生态化学计量特征的影响。结果表明，植物群落特征在不同退耕年限之间差异显著(P<0.05)，Shannon-Wiener多样性指数、Pielou均匀度指数呈逐步增加趋势，Margalef丰富度指数呈逐渐减少趋势；不同退耕年限下土壤化学计量特征具有显著性差异(P<0.05)，有机碳含量在退耕20 a时最高，退耕10 a时最低，全氮、全磷含量呈波动增加的趋势；不同退耕年限、植物群落特征、土壤养分含量三者之间具有显著的相关关系(P<0.05)。因此，建议对不同退耕恢复年限的压砂地适当增施肥料，以加快促进植物群落结构重建与生物多样性恢复。

关键词: 压砂地, 植物群落特征, 土壤化学计量特征

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