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农学学报

农学学报 ›› 2025, Vol. 15 ›› Issue (9): 50-57.doi: 10.11923/j.issn.2095-4050.cjas2024-0121

• 土壤肥料 资源环境 生态 • 上一篇    下一篇

桂西北岩溶地区任豆凋落物理化特性与土壤肥力的相关性

苏黎颖(), 马秋妮, 陆素芬, 陈业佳, 罗彩妹, 覃勇荣()   

  1. 河池学院化学与生物工程学院，广西宜州 546300
  • 收稿日期:2024-06-17 修回日期:2024-10-22 出版日期:2025-09-17 发布日期:2025-09-17
  • 通讯作者:
    覃勇荣，1963年出生，广西平南人，教授，硕士，主要从事岩溶地区生态环境保护及资源开发利用研究。通信地址：546300 广西河池市宜州区龙江路42号，Tel：0778-3178363，E-mail：。
  • 作者简介:

    苏黎颖，女，2001年出生，广西梧州人，学士，主要从事环境化学分析相关问题的研究。通信地址：546300 广西河池市宜州区龙江路42号，Tel：0778-3178363，E-mail：。

  • 基金资助:
    广西自然科学基金项目“广西不同植被恢复模式对石漠化地区生态恢复效果的比较研究”(桂科自0832273); 校地校企合作科技创新平台“桂西北地方资源保护与利用工程中心”(桂教科研〔2012〕9号); 河池学院高层次人才科研启动费项目“桂西北岩溶地区石漠化治理优化模式研究”(XJ2018GKQ016); 广西高校大学生创新创业训练计划项目“任豆凋落物理化特性对岩溶地区土壤微生物多样性的影响”(202310605036)

Correlation Between Physical and Chemical Characteristics of Zenia insignis Litter and Soil Fertility in Karst Area of Northwest Guangxi

SU Liying(), MA Qiuni, LU Sufen, CHEN Yejia, LUO Caimei, QIN Yongrong()   

  1. School of Chemistry and Bio-engineering, Hechi University, Yizhou Guangxi 546300
  • Received:2024-06-17 Revised:2024-10-22 Online:2025-09-17 Published:2025-09-17

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摘要： 为说明任豆凋落物对土壤肥力变化的影响及其作用机制，于2022年8月—2023年9月，在广西河池市宜州区及周边县区，选择任豆人工林的主要分布点作为调查研究样地，分别采集任豆及对照植物青檀、阴香根部的土壤样品和凋落物样品，通过对不同植物凋落物和土壤理化性质的测定及其相关性分析，说明土壤肥力与凋落物理化特性的关系。结果表明：（1）从土壤基本理化特性来看，青檀样地和任豆样地的土壤肥力优于阴香样地；（2）从凋落物分解速率来看，不同植物凋落物分解速率的高低排序为青檀>任豆>阴香；（3）凋落物中的有机质含量与土壤中的全磷和有效磷含量具有显著的正相关，与土壤中的C/P具有极显著的负相关，凋落物中的全磷含量和C/P分别与土壤中的C/N呈显著正相关和显著负相关，凋落物中的C/N与土壤中的C/P呈显著负相关，凋落物的N/P与土壤中的全氮和碱解氮含量均呈极显著的正相关，凋落物的其他被测指标与土壤理化指标有一定的相关性，但不显著。由此可见，凋落物的理化特性对土壤肥力变化具有重要影响，栽种任豆，其凋落物可以在一定程度上提高岩溶地区土壤的肥力水平。研究以期为岩溶地区植被恢复及中国特有的珍稀野生植物保护，防止生态环境恶化提供理论支持。

关键词: 桂西北, 岩溶地区, 任豆, 凋落物理化特性, 土壤肥力

Abstract:

To explain the effect of Zenia insignis litter on soil fertility and its mechanism, the relationship between soil fertility and physicochemical properties of different plant litter and soil were studied through the relative determination and correlation analysis. From August 2022 to September 2023, the main distribution points of Zenia insignis plantation were selected as the investigation and research plots in Yizhou District and surrounding counties and districts of Hechi City, Guangxi. The results showed that: (1) from the perspective of basic soil physical and chemical characteristics, the soil fertility of Pteroceltis tatarinowii and Zenia insignis plots was better than that of Cinnamomum burmanni. (2) From the perspective of decomposition rate of litter, the order of decomposition rate of different plant litter was Pteroceltis tatarinowii > Zenia insignis > Cinnamomum burmanni. (3) The organic matter content in litter had a significant positive correlation with the total phosphorus and available phosphorus content in soil, and a highly significant negative correlation with the C/P in soil. The total phosphorus content and C/P in litter were significantly positively correlated and negatively correlated with C/N in soil, respectively. There was a significant negative correlation between C/N in litter and C/P in soil. The N/P of litter was significantly positively correlated with the total nitrogen and alkaline nitrogen content in the soil, while the other measured indexes of litter were not significantly correlated with the physical and chemical indexes of soil. From this, it could be seen that the physical and chemical characteristics of litter had an important impact on soil fertility changes. Planting Zenia insignis could improve the fertility level of soil in karst areas to a certain extent through the litter. The research aims to provide theoretical support for vegetation restoration in karst areas and the protection of rare wild plants unique to China, as well as to prevent the deterioration of the ecological environment.

Key words: northwest Guangxi, karst area, Zenia insignis Chun, physical and chemical characteristics of litter, soil fertility