西北地区有机质空间分布及其影响因素研究

雷琪; 蒋洪丽; 吴淑芳; 冯浩

doi:10.13870/j.cnki.stbcxb.2022.03.039

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西北地区有机质空间分布及其影响因素研究

更新时间：2026-04-09

- 西北地区有机质空间分布及其影响因素研究
- Spatial Distribution of Organic Matter and Its Influencing Factors in Northwest China
- 水土保持学报 2022年36卷第3期页码：274-279
- 作者机构：
  
  1. 西北农林科技大学水利与建筑工程学院, 陕西杨凌,712100
  2. 西北农林科技大学中国旱区节水农业研究所, 陕西杨凌,712100
  3. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
- 作者简介：
  
  [ "雷琪(1997-),男,硕士研究生,主要从事农业水土资源高效利用研究。E-mail:leiqiz@163.com" ]
- 基金信息：
  
  中国科学院STS区域重点项目(KFJ-STS-QYZD-108)
- DOI：10.13870/j.cnki.stbcxb.2022.03.039
  中图分类号： S159.2
- 网络首发：2022-05-27，
  
  纸质出版：2022
- 稿件说明：
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雷琪, 蒋洪丽, 吴淑芳, 等. 西北地区有机质空间分布及其影响因素研究[J]. 水土保持学报, 2022,36(3):274-279.

LEI Qi, JIANG Hongli, WU Shufang, et al. Spatial Distribution of Organic Matter and Its Influencing Factors in Northwest China[J]. 2022, 36(3): 274-279.
雷琪, 蒋洪丽, 吴淑芳, 等. 西北地区有机质空间分布及其影响因素研究[J]. 水土保持学报, 2022,36(3):274-279. DOI： 10.13870/j.cnki.stbcxb.2022.03.039.

LEI Qi, JIANG Hongli, WU Shufang, et al. Spatial Distribution of Organic Matter and Its Influencing Factors in Northwest China[J]. 2022, 36(3): 274-279. DOI： 10.13870/j.cnki.stbcxb.2022.03.039.

摘要

为了探讨中国西北地区土壤有机质现状及影响因素

运用ArcGIS和地统计学结合的方法

研究西北地区土壤有机质的空间分布规律及其影响因素。结果表明:(1)研究区土壤有机质含量处于较低水平

3级及以下占68.94%

有机质变化范围为1.10~107.50 g/kg

均值为20.13 g/kg;通过半方差函数模型分析得到有机质的最适理论模型为球状模型。(2)通过绘制整个西北地区土壤有机质的空间分布图可知

研究区东部区域从宁夏、陕北至甘南、陕南

有机质含量呈现出梯级增加的趋势;研究区西部有机质含量呈现出由新疆塔里木盆地中心区域向边界递增的同心圆分布。有机质高值区分布在研究区青海东部、新疆的天山一带;低值区分布在宁夏、陕西北部和新疆的塔里木盆地。分布趋势与西北地区大地形区有一定的相似性。(3)土壤有机质含量与海拔、降水存在正相关关系。(4)有机质与土壤类型和土地利用方式之间存在显著相关关系

草地、林地土壤有机质含量显著高于耕地和未利用土地

但草地与林地之间没有显著性差异。海拔和降水是影响有机质的主要因素

能解释49%的土壤有机质变化。该研究结果不仅有助于定性定量认识西北地区有机质空间分布

而且为该地区的生态农业建设以及生态环境保护提供参考。

Abstract

In order to explore the current status and influencing factors of soil organic matter in Northwest China

this paper used ArcGIS and geostatistics to study the spatial distribution of soil organic matter and its influencing factors in Northwest China. The results showed that:(1) The overall soil organic matter content in the study area is at a relatively low level

with grade 3 and below accounting for 68.94%

the organic matter variation range is 1.10~107.5 g/kg

and the average value is 20.13 g/kg; the organic matter is obtained by semivariance function model analysis. The optimal theoretical model was the spherical model. (2) By drawing the spatial distribution map of soil organic matter in the entire northwestern region

it could be seen that the organic matter content in the eastern part of the study area from Ningxia

northern Shaanxi to southern Gansu and southern Shaanxi shows a gradual increase. The central area of the Tarim Basin was distributed in concentric circles increasing to the boundary. The high-value areas of organic matter were distributed in the eastern part of Qinghai and the Tianshan Mountains in Xinjiang; the low-value areas were distributed in Ningxia

northern Shaanxi

and the Tarim Basin in Xinjiang. Such a distribution trend was somewhat similar to the distribution of large topographical areas in Northwest China. (3) There was a positive correlation between soil organic matter content and altitude and precipitation. (4) There were significant correlations between organic matter and soil types and land use patterns. The content of soil organic matter in grassland and woodland was significantly higher than that of cultivated land and unused land

but there was no significant difference between grassland and woodland. Altitude and precipitation were the main factors affecting organic matter

which can explain 49% of changes in soil organic matter. The results of this study will not only help qualitatively and quantitatively understand the spatial distribution of organic matter in Northwest China

but also provide a reference for soil texture for the construction of ecological agriculture and ecological environment protection in this region.

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