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自然资源学报 >

2018 , Vol. 33 >Issue 4: 634 - 643

DOI: https://doi.org/10.11849/zrzyxb.20170477

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黄土高原不同地貌类型区农田土壤有机碳采样布点方法研究

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  • 1.西北农林科技大学林学院,陕西 杨凌 712100;
    2.中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西 杨凌 712100
张圣民（1992- ）,男,山东泰安人,硕士研究生,主要从事黄土高原农田土壤有机碳研究。E-mail: 626188325@qq.com

收稿日期: 2017-05-17

  修回日期: 2017-11-17

  网络出版日期: 2018-04-10

基金资助

科技基础性工作专项（2014FY210100）;国家重点研发计划课题（2017YFC0506503）

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Methods of Sampling Soil Organic Carbon in Farmlands with Different Landform Types on the Loess Plateau

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  • 1.College of Forestry, Northwest A & F University, Yangling 712100, China;
    2. State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, CAS and Ministry of Water Resources, Yangling 712100, China

Received date: 2017-05-17

  Revised date: 2017-11-17

  Online published: 2018-04-10

Supported by

Science and Technology Basic Work, No. 2014FY210100;National Key R & D Program of China, No. 2017YFC0506503.

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摘要

采样设计是土壤有机碳研究中面临的首要问题。论文对黄土高原不同地貌类型区农田土壤有机碳进行抽样样本代表性评价,对比分析了不同采样方法的样点布设效率,结果表明：1）高塬区合理采样布点方法应为网格布点法,采样点布设格网间隔4 km,网格布点法较随机布点法和联合单元布点法效率分别提高64.3%和31.8%;2）平原区合理采样布点方法应为网格布点法,采样点布设格网间隔2 km,网格布点较随机布点和联合单元布点效率分别提高64.8%和128.8%;3）丘陵区合理采样布点方法应为联合单元布点法,样点布设密度为1个/1 314 hm2,联合单元布点较随机布点和网格布点效率分别提高205.8%和294.2%。

关键词： 布点效率; 采样布点方法; 土壤有机碳; 样本代表性

本文引用格式

张圣民, 许明祥, 张志霞, 李彬彬 . 黄土高原不同地貌类型区农田土壤有机碳采样布点方法研究[J]. 自然资源学报, 2018 , 33(4) : 634 -643 . DOI: 10.11849/zrzyxb.20170477

Abstract

Sampling design is a critical issue in soil organic carbon research. In this paper, the purpose was to find out the most appropriate sampling method among various sampling designs in farmlands with different landform types. We used the sample representative evaluation in classical statistics to compare the efficiency of most commonly used sampling methods, including random distribution, grid sampling design and joint unit method. The representative samples of soil organic carbon in farmlands with different landform types on the Loess Plateau were evaluated. The results demonstrated that: 1) A reasonable sampling method for Ning County in the upland area of Loess Plateau was grid sampling design with a suggested grid interval of 4 km. The efficiency of grid sampling design was 64.3% and 31.8% higher than the efficiency of random distribution method and joint unit method, respectively. 2) A reasonable sampling method for Wugong County in the plain area of the Loess Plateau was also grid sampling design with a suggested sampling interval of 2 km. The efficiency of grid sampling method was 64.8% and 128.8% higher than the efficiency of random distribution method and joint unit method, respectively. 3) The reasonable sampling method was joint unit layout method in the hilly and gully region of the Loess Plateau, such as in Zhuanglang County. The suggested density of the joint unit layout method in this area was 1 unit/1 314 hm2, and the efficiency of joint unit distribution was 205.8% and 294.2% higher than the efficiency of random distribution and grid distribution, respectively.

Key words： representative of samples; sampling design; sampling efficiency; soil organic carbon

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