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中国农学通报 ›› 2023, Vol. 39 ›› Issue (18): 81-85.doi: 10.11924/j.issn.1000-6850.casb2022-0527

• 资源·环境·生态·土壤 • 上一篇    下一篇

浙东沿海涂地土壤结构演变特征及机理研究

陶娟花1(), 石其伟1, 伍少福2, 章明奎3()   

  1. 1 绍兴市柯桥区农业水产技术推广站,浙江绍兴 312030
    2 绍兴市粮油作物技术推广中心,浙江绍兴 312000
    3 浙江大学环境与资源学院,杭州 310058
  • 收稿日期:2022-06-22 修回日期:2022-09-03 出版日期:2023-06-25 发布日期:2023-06-25
  • 通讯作者: 章明奎,男,1964年出生,浙江绍兴人,教授,博士,主要从事土壤质量方面的研究。通信地址:310058 杭州市西湖区余杭塘路866号 浙江大学环境与资源学院,E-mail:mkzhang@zju.edu.cn
  • 作者简介:

    陶娟花,女,1987年出生,浙江绍兴人,农艺师,学士,主要从事土壤肥料技术的研究与推广。通信地址:312030 绍兴市柯桥区金柯桥大道306号 绍兴市柯桥区农业水产技术推广站,Tel:0575-88067553,E-mail:

  • 基金资助:
    国家自然科学基金面上项目“长期全年淹水集约种植对水耕人为土性态演变与物质循环及生态功能的影响”(41977001)

Study on Evolution Characteristics and Mechanism of Soil Structure in the Coastal Area of Eastern Zhejiang Province

TAO Juanhua1(), SHI Qiwei1, WU Shaofu2, ZHANG Mingkui3()   

  1. 1 Keqiao District Agricultural and Fishery Technology Extension Station of Shaoxing, Shaoxing, Zhejiang 312030
    2 Shaoxing Grain and Oil Crop Technology Extension Center, Shaoxing, Zhejiang 312000
    3 College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058
  • Received:2022-06-22 Revised:2022-09-03 Online:2023-06-25 Published:2023-06-25

摘要:

为了解涂地围垦利用过程中土壤结构的变化特征,探讨浙江沿海涂地土壤结构的演变及变化机理,以浙南—乐清湾和浙北—杭州湾为研究对象,采用田间采集不同围垦时间土壤的理化分析与室内加盐、施有机肥及干湿交替培养试验相结合的方法,分析了不同条件下土壤结构的变化。调查结果表明,从潮滩盐土经滨海盐土至潮土、水稻土,随着围垦利用时间的增加及土地利用方式的改变,土壤结构由松散状单粒为主转变为弱块状结构最后演变为稳定的块状结构,>0.25 mm水稳定性团聚体数量明显增加,同时水稳定性团聚体的粒径也逐渐增大。培养试验与土壤分析的结果表明:干湿交替和土壤脱盐是促使由潮滩盐土至滨海盐土水稳定性团聚体迅速增加的关键因素,而有机质的积累和耕作熟化是由滨海盐土至潮土、水稻土水稳定性团聚体逐渐增加的主要原因。

关键词: 滨海平原, 团聚体, 脱盐, 干湿交替, 围垦时间, 利用方式, 变化规律

Abstract:

To understand the change characteristics of soil structure in the process of reclamation and utilization of coastal land, we took Yueqing Bay in southern Zhejiang and Hangzhou Bay in northern Zhejiang as the research objects, conducted physical and chemical analysis of the soils with different reclamation time and incubation experiments by adding salt and organic fertilizer and dry-wet alternation, to explore the evolution and formation mechanism of soil structure in the coastal land of Zhejiang Province. The results showed that from coastal saline soil to fluvo-aquic soil to paddy soil, with the increase of reclamation time and the change of land use, the soil structure changed from loose single grain to weak block structure, and finally evolved into stable block structure, the amount of > 0.25 mm water stable aggregates increased significantly, and the particle size of water stable aggregates also gradually increased. The results of both incubation experiments and soil analysis showed that the dry-wet alternation and soil desalination were the key factors for the rapid increase of water stable aggregates from intertidal beach saline soil to coastal saline soil, while the accumulation of organic matter and cultivation maturity were the main reasons for the gradual increase of water stable aggregates from coastal saline soil to fluvo-aquic soil to paddy soil.

Key words: coastal plain, aggregates, desalination, alternation of dry and wet, reclamation time, utilization mode, change law