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中国农学通报 ›› 2021, Vol. 37 ›› Issue (33): 83-87.doi: 10.11924/j.issn.1000-6850.casb2021-0302

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

耕作方式对根土关系的影响及CT技术在其研究上的应用

郑洪兵(), 罗洋, 李瑞平, 隋鹏祥, 王浩, 袁野, 刘武仁, 郑金玉()   

  1. 吉林省农业科学院农业资源与环境研究所/农业部东北作物生理生态与耕作重点实验室,长春 130033
  • 收稿日期:2021-03-22 修回日期:2021-06-22 出版日期:2021-11-25 发布日期:2022-01-06
  • 通讯作者: 郑金玉
  • 作者简介:郑洪兵,男,1980年出生,吉林白城人,副研究员,博士,主要从事土壤农作制度与保护性耕作研究。通信地址:130033 吉林省长春市净月经济开发区生态大街1363号,E-mail: hongbingzheng@126.com
  • 基金资助:
    吉林省农业科技创新工程国际科技合作项目“东北保护性耕作黑土结构特征及可视化研究”(CXGC202101GH);吉林省科技发展计划项目“玉米全程机械化保护性耕作关键技术研究”(20200402011NC);吉林省科技发展计划项目“吉林省半湿润区持续高效农作制度研究与示范”(20190301069NY);国家自然科学基金项目“苗带紧行间松合理耕层土壤结构特征及其调控机制”(31501248)

Effect of Tillage Methods on Interaction Relationship of Soil and Root Structure and Application of CT Technology

Zheng Hongbing(), Luo Yang, Li Ruiping, Sui Pengxiang, Wang Hao, Yuan Ye, Liu Wuren, Zheng Jinyu()   

  1. Research Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Science/Key Laboratory of Crop Ecophysiology and Farming System in Northeast China, Changchun 130033
  • Received:2021-03-22 Revised:2021-06-22 Online:2021-11-25 Published:2022-01-06
  • Contact: Zheng Jinyu

摘要:

东北是中国重要的粮食生产基地,在保障国家粮食安全发挥了重要作用,合理的土壤结构促进作物根系生长,为高产奠定了良好的物质基础。而土壤耕作调控土壤结构创造良好耕层结构,促进作物根系生长,是良好土壤结构形成和根系健康生长的“桥梁”,将土壤结构与作物根系之间关系结合起来,起着非常重要调控作用。本文阐述了耕作方式对土壤结构的影响及土壤结构与作物根系之间的互作关系,分析了CT技术在土壤结构和根系结构上的应用,展望了东北农田黑土区土壤结构和作物根系互作关系的研究重点及发展方向:一是要明确保护性耕作原状土体和团聚体结构特征,解析新型耕作技术对土壤结构的调控作用机制,阐明土壤结构决定土壤功能的内在机理;二是要明确保护性耕作玉米根系的结构特征,解析玉米根系生理代谢及衰老机制,揭示玉米根系生长对土壤结构应答的响应机制。其研究将为保育东北黑土,塑造理想根型,提升作物产量和助推全程机械化安全生产提供理论支撑。

关键词: 耕作制度, 土壤结构, 根系结构, X射线计算机断层扫描

Abstract:

Northeast China is a major grain production base in the country and has an essential role in ensuring the national food security. Rational soil structure can enhance crop root growth to form a sound basis for achieving high yield. Soil tillage can be a useful method for improving soil structure and enhancing root growth to build a “bridge” between soil structure and crop root, and regulate their function for improving soil structure and root growth. So, this paper reviewed the effect of tillage methods on soil structure and the relationship between soil structure and root structure, and analyzed the application of CT technology on soil structure and root structure. In addition, the scientific focuses of interaction relationship between soil structure and root structure were classified for protecting black soil in northeast China: (1) to study the original soil body and aggregate structure of conservative tillage clearly, classify the mechanism of new tillage technology on soil structure and analyze the internal mechanism of soil structure determining soil function; (2) to study the features of maize root structure under conservative tillage, classify mechanism of maize root physiology and aging, and reveal the response mechanism of maize to soil structure. The study can provide certain theoretical support for black soil conservation in northeast China, building better maize root structure, improving the crop yield and enhancing full mechanized agricultural production.

Key words: faming system, soil structure, root structure, X-ray computed tomography

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