Effects of Typical Rocky Desertification Control Measures on Soil Organic Carbon, Nitrogen, and Components

BAI Yixin; SHENG Maoyin; XIAO Hailong and HU Qijuan

doi:10.13870/j.cnki.stbcxb.2020.01.025

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Effects of Typical Rocky Desertification Control Measures on Soil Organic Carbon, Nitrogen, and Components

更新时间：2025-03-12

- Effects of Typical Rocky Desertification Control Measures on Soil Organic Carbon, Nitrogen, and Components
- Vol. 34, Issue 1, Pages: 170-177(2020)
- 作者机构：
  
  1. 国家喀斯特石漠化治理工程技术研究中心,贵阳,550001
  2. 贵州师范大学喀斯特研究院,贵阳,550001
  3. 贵州省喀斯特石漠化防治与衍生产业工程实验室,贵阳,550001
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.01.025
  CLC： S714.2
- Published：2020
- 稿件说明：
移动端阅览
BAI Yixin, SHENG Maoyin, XIAO Hailong and HU Qijuan. Effects of Typical Rocky Desertification Control Measures on Soil Organic Carbon, Nitrogen, and Components[J]. 2020, 34(1): 170-177.
DOI：

BAI Yixin, SHENG Maoyin, XIAO Hailong and HU Qijuan. Effects of Typical Rocky Desertification Control Measures on Soil Organic Carbon, Nitrogen, and Components[J]. 2020, 34(1): 170-177. DOI： 10.13870/j.cnki.stbcxb.2020.01.025.

摘要

以贵州关岭花江喀斯特峡谷花椒（HJ）、火龙果（HL）、花椒火龙果混交（HHL）、皇竹草（HZ）、苜蓿（MX）、圆柏（YB）、圆柏女贞混交（YBN）、撂荒地（LH）、坡耕地（PD）9种典型石漠化治理措施为研究对象，研究不同治理措施土壤剖面有机碳、全氮含量和储量、水溶性有机碳含量分布规律。结果表明：各治理措施0—20 cm土层土壤有机碳、全氮含量及储量、水溶性有机碳含量均随土壤剖面深度增加而降低，具有明显的表聚现象。其中土壤有机碳、全氮含量0—20 cm土层平均值大小顺序分别为YB > YBN > LH > HJ > MX > PD > HHL > HL > HZ、YBN > YB > LH > PD > MX > HJ > HZ > HHL > HL，土壤有机碳、全氮储量及水溶性有机碳含量也均表现为YB、YBN、LH显著大于其他6种治理措施；各治理措施土壤C/N为7.19~16.35。相关性分析表明，土壤有机碳含量与土壤全氮含量、有机碳储量、水溶性有机碳含量存在极显著相关，土壤容重是土壤碳氮指标的关键因子，具有较好相关性。研究阐明，在今后石漠化治理过程中，退耕还林、撂荒地有利于喀斯特生态环境治理与保护，花椒林可作为喀斯特山区农业生产或生态恢复过程中优先考虑的经济植被类型。

Abstract

Taking nine typical measures for controlling rocky desertification in Huajiang karst Canyon of Guanling

Guizhou Province as test objects

including Zanthoxylum bungeanum (HJ)

Hylocereus undulatus (HL)

Zanthoxylum bungeanum and Hylocereus undulatus (HHL)

Pennisetum hydridum (HZ)

Medicago sativa (MX)

Sabina chinensis (YB)

Sabina chinensis and Ligustrum lucidum (YBN)

Bare land (LH)

and slope farmland (PD)

the distribution of organic carbon

total nitrogen

and water-soluble organic carbon in soil profile under different control measures was studied. The results showed that the contents of soil organic carbon

total nitrogen

reserves and water-soluble organic carbon decreased with the increase of soil profile depth in 0-20 cm soil layers

and the phenomena of surface accumulation were obvious. The order of average soil organic carbon and total nitrogen content in 0-20 cm layer was YB > YBN > LH > HJ > MX > PD > HHL > HL > HZ

YBN > YB > LH > PD > MX > HJ > HZ > HHL

respectively. Soil organic carbon

total nitrogen reserves and water-soluble organic carbon content also showed that YB

YBN

and LH were significantly higher than the other six control measures. Soil C/N of each control measure ranged from 7.19 to 16.35. Correlation analysis showed that soil organic carbon content was significantly correlated with soil total nitrogen content

organic carbon storage and soluble organic carbon content. Soil bulk density was the key factor of soil carbon and nitrogen index

and had a good correlation. The study clarifies that in the process of controlling rocky desertification in the future

returning farmland to forest and abandoning desert land will be beneficial to the control and protection of karst ecological environment. Zanthoxylum bungeanum forest can be regarded as the priority economic vegetation type in the process of agricultural production or ecological restoration in Karst Mountainous areas.

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