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现代地质 ›› 2024, Vol. 38 ›› Issue (03): 764-774.DOI: 10.19657/j.geoscience.1000-8527.2024.046

• 水土资源地球化学过程观测模拟与综合评价 • 上一篇    下一篇

贵州省桐梓县耕地表层土壤养分元素有效性研究

潘有良1,2(), 王小洪2(), 费光春1, 杨恩林3, 肖玉2, 张钟华2   

  1. 1.成都理工大学地球科学学院,四川 成都 610059
    2.贵州省地质矿产勘查开发局117地质大队,贵州 贵阳 550018
    3.贵州师范大学地理与环境科学学院,贵州 贵阳 550025
  • 出版日期:2024-06-10 发布日期:2024-07-04
  • 通讯作者: 王小洪,男,工程师,1992年出生,主要从事地球化学、地质调查工作。Email: 1258739431@qq.com。
  • 作者简介:潘有良,男,工程师,1989年出生,主要从事矿产勘查、地球化学研究。Email: 952643364@qq.com
  • 基金资助:
    贵州省桐梓县耕地质量地球化学调查评价项目(2017-19)

A Study on the Availability of Topsoil Nutrient Elements of the Cultivated Land in Tongzi County, Guizhou Province

PAN Youliang1,2(), WANG Xiaohong2(), FEI Guangchun1, YANG Enlin3, XIAO Yu2, ZHANG Zhonghua2   

  1. 1. College of Earth Science, Chengdu University of Technology, Chengdu, Sichuan 610059, China
    2. 117 Geological Party, Guizhou Bureau of Geology and Mineral Exploration & Development, Guiyang, Guizhou 550018, China
    3. School of Geography and Environmental Science, Guizhou Normal University, Guiyang, Guizhou 550025, China
  • Online:2024-06-10 Published:2024-07-04

摘要:

通过研究贵州省桐梓县耕地表层土壤养分元素有效性及其影响因素,为耕地资源规划、发展现代农业提供科学依据。根据桐梓县耕地质量地球化学调查评价所获得的表层土壤有效态样品,对其养分元素(指标)测试分析,探讨耕地表层土壤养分元素及其有效态的含量、分布特征、等级状况及影响因素。结果表明,研究区耕地表层土壤养分元素全量整体较丰富,硼、钼、锌全量以丰富等级为主,分别占总样本数56.34%、65.49%、77.96%;氮全量以较丰富为主,占比41.16%;而磷全量以较缺乏为主,占比32.23%。有效量整体较缺乏,速效磷、有效钼以缺乏为主,分别占比46.05%、30.14%;有效硼、速效钾以较缺乏为主,占比分别为64.66%、50.94%;而有效锌较丰富,占比50.83%。研究区耕地表层土壤养分元素全量是其有效量的主控因素,养分元素有效性受表生地球化学及土壤理化性质的影响;不同的地质单元、土壤类型、土地利用类型中土壤养分元素有效性差异性显著;增加阳离子交换量可以促进土壤养分元素有效量的转化,提高土壤中有机质含量能增加养分元素有效性。

关键词: 耕地质量地球化学调查, 土壤养分, 有效量, 桐梓县

Abstract:

The study on the availability and influencing factors of nutrient elements in topsoil in Tongzi County, Guizhou Province provides a scie.pngic basis for managing the cultivated land resources and development of modern agriculture.The nutrient elements were analyzed using available topsoil state samples from the geochemical survey of land quality in Tongzi County.We further discussed the content, spatial distribution, grade status, and influencing factors of these nutrient elements.The study results show that the total content of the topsoil nutrient elements in the cultivated land is generally rich.Total boron, molybdenum, and zinc are relatively ri-cher, accounting for 56.34%, 65.49%, and 77.96% of the total sample, respectively.Total nitrogen is gene-rally rich, accounting for 41.16%, and total phosphorus is generally low, accounting for 32.23%.However, the available content of topsoil nutrient elements is relatively lower.The available phosphorus and molybdenum are relatively lower, accounting for 46.05% and 30.14%, respectively.The available boron and potassium are generally low, accounting for 64.66% and 50.94%, respectively, and the available zinc is generally rich, accounting for 50.83%.The total nutrient elements are the primary impacting factor for the available content in the topsoil of the study area, and the available nutrient elements can be influenced by the surficial geochemical properties and soil physicochemical properties, of which the variability of the topsoil nutrient elements in different geological units, soil types, and utilization types is significant.Moreover, increasing the cation exchange capacity can promote the conversion of available nutrient elements, and increasing the organic matters in topsoil can increase the availability of nutrient elements.

Key words: geochemical survey, cultivated land quality, soil nutrient, available content, Tongzi County

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