Characteristics of Soil Organic Matter and Available Potassium in Different Types of Pisha Sandstone Area of Inner Mongolia

XING Qixin; RAO Liangyi; WANG Zhizhen; HU Jianru; XU Yeqin

doi:10.13870/j.cnki.stbcxb.2019.06.036

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Characteristics of Soil Organic Matter and Available Potassium in Different Types of Pisha Sandstone Area of Inner Mongolia

更新时间：2025-03-12

- Characteristics of Soil Organic Matter and Available Potassium in Different Types of Pisha Sandstone Area of Inner Mongolia
- Vol. 33, Issue 6, Pages: 257-264(2019)
- 作者机构：
  
  1. 北京林业大学水土保持学院,北京,100083
  2. 水土保持国家林业局重点实验室,北京,100083
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2019.06.036
  CLC：
- Published：2019
- 稿件说明：
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XING Qixin, RAO Liangyi, WANG Zhizhen, et al. Characteristics of Soil Organic Matter and Available Potassium in Different Types of Pisha Sandstone Area of Inner Mongolia[J]. 2019, 33(6): 257-264.
DOI：

XING Qixin, RAO Liangyi, WANG Zhizhen, et al. Characteristics of Soil Organic Matter and Available Potassium in Different Types of Pisha Sandstone Area of Inner Mongolia[J]. 2019, 33(6): 257-264. DOI： 10.13870/j.cnki.stbcxb.2019.06.036.

摘要

选择内蒙古鄂尔多斯准格尔旗不同类型砒砂岩区，通过野外采样和室内分析试验，研究了土壤有机质和速效钾特征，并探讨不同土层、坡位和坡向以及植被丰富度等因子对其影响。结果表明：（1）整体上看，覆土区、覆沙区和裸露区有机质含量介于6.65~7.41 g/kg，处于低水平，速效钾含量介于74.61~137.38 mg/kg，处于中高水平。（2）覆土区地形因子对土壤有机质和速效钾的影响最明显，根据3个不同类型区坡向、坡位及坡向与坡位的交互作用对土壤有机质、速效钾呈现的显著或者极显著关系出现频数，初步判断其影响程度大小为坡位（6次） > 坡向（4次） > 坡向×坡位（2次）。（3）3个类型区植被丰富度指数与土壤有机质、速效钾含量相关性较高，是进行土壤养分研究应考虑的重要因素。

Abstract

In this study

different types of pisha sandstone in Zhungeer Banner

Ordos

Inner Mongolia were selected to study the characteristics of organic matter (OM) and available potassium (AK) in soil through field sampling and indoor experiments

and the impact of different soil layers

slope position and slope direction

vegetation richness and other factors on OM and AK was also explored. The results showed that:(1) On the whole

the content of OM in the loess covered area

the sand covered area and the exposed area was between 6.65~7.41 g/kg

which was at a low level

and the content of AK was between 74.61~137.38 mg/kg

which was at a medium high level. (2) Topographic factors had the most obvious effect on soil OM and AK in the loess covered area. Slope direction

slope position and the interaction between slope direction and slope position were correlated with soil nutrients

according to the frequency of significant or extremely significant occurrence. The relationship of the degree of influence was preliminarily demonstrated as slope position > slope direction > slope direction×slope position. (3) There was a high correlation between vegetation richness and soil OM and AK content in three different types of regions

which is an important factor to be considered in soil nutrient study.

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