青海玛沁县东部表层土壤养分地球化学评价

doi:10.11720/wtyht.2025.1177

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摘要

玛沁县是青海省重要的牧业县,区内天然可利用草原超过1 300万亩,牧草资源丰富,2022年在玛沁县东部地区开展了1∶25万土地(牧草地)质量地球化学调查工作。本文依据调查区表层土壤植物营养元素含量数据,评价了各养分元素的丰缺情况。区内土壤养分地球化学综合等级以一等、二等土壤为主,占调查区总面积的 91.68%,三等、四等土壤仅占8.33%,无五等土壤;土壤养分整体较丰富,为发展高原特色农牧业奠定了良好基础条件。研究成果为当地牧草地规划利用、特色农牧业发展以及退化草场的修复提供了重要的基础资料。

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	张浩
	牛尧
	张海旭
	沙惠兰

关键词 ：表层土壤, 养分地球化学评价, 高寒牧草地, 玛沁县

Abstract：

Maqin County, an important county of animal husbandry in Qinghai Province, hosts more than 13 million mu of naturally available grassland and rich forage resources. In 2022, a 1∶250 000 land (grassland) quality geochemical survey was carried out in the eastern part of Maqin County. This survey represents the first large-scale land quality survey of grassland in the Qingnan region of Qinghai Province, setting a model exemplary role. Based on nutrient content in plants from the surface soil in the survey area, this study assessed the abundance and deficiency of various nutrient elements. The results indicate that soils in the survey area are dominated by first- and second-grade soils in terms of comprehensive geochemical grades of soil nutrients, accounting for 91.68% of the total area. In contrast, third- and fourth-grade soils collectively represent 8.33%, with no fifth-grade soils identified. The generally rich nutrients in the soils provide a solid foundation for the development of plateau-specific agriculture and animal husbandry. The results of this study provide essential foundational information for the planning and utilization of local grasslands, the development of agriculture and animal husbandry with local features, and the restoration of degraded pastures.

Key words： surface soil nutrient geochemical evaluation alpine grassland Maqin County

收稿日期: 2024-04-19 修回日期: 2024-07-24 出版日期: 2025-06-20

ZTFLH:

P632

基金资助:青海省省级财政资金地质勘查项目(2022012018jc012);青海省省级财政资金地质勘查项目(2023085017jc017)

作者简介: 张浩(1993-),男,水工环地质工程师,长期从事地球化学勘查、农业地球化学等研究工作。Email:774675752@qq.com

引用本文:

张浩, 牛尧, 张海旭, 沙惠兰. 青海玛沁县东部表层土壤养分地球化学评价[J]. 物探与化探, 2025, 49(3): 697-707.
ZHANG Hao, NIU Yao, ZHANG Hai-Xu, SHA Hui-Lan. Geochemical evaluation of surface soil nutrients in eastern Maqin County, Qinghai Province, China. Geophysical and Geochemical Exploration, 2025, 49(3): 697-707.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2025.1177 或 https://www.wutanyuhuatan.com/CN/Y2025/V49/I3/697

Fig.1 玛沁县土壤景观分区

Fig.2 分析样点位分布

Table 1 土壤样元素测试分析结果

Table 2 土壤大量、中量养分指标等级划分及统计

Fig.3 土壤中氮、磷、钾等养分指标地球化学等级分布

Table 3 微量营养与有益元素地球化学等级划分及统计

Fig.4 土壤中微量养分元素指标地球化学等级

Table 4 土壤养分综合地球化学等级统计

Fig.5 工作区土壤养分地球化学综合分级

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