Contents of Soil Organic Carbon and Its Relations with Physicochemical Properties of Secondary Natural Oak Forests in Eastern Mountain Area of Liaoning Province

doi:10.13870/j.cnki.stbcxb.2017.04.022

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Contents of Soil Organic Carbon and Its Relations with Physicochemical Properties of Secondary Natural Oak Forests in Eastern Mountain Area of Liaoning Province

更新时间：2025-03-12

- Contents of Soil Organic Carbon and Its Relations with Physicochemical Properties of Secondary Natural Oak Forests in Eastern Mountain Area of Liaoning Province
- Vol. 31, Issue 4, Pages: 135-140(2017)
- 作者机构：
  
  辽宁省森林经营研究所辽宁辽东半岛森林生态系统国家定位观测研究站,辽宁,丹东,118000
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.04.022
  CLC： S714.2
- Published：2017
- 稿件说明：
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Contents of Soil Organic Carbon and Its Relations with Physicochemical Properties of Secondary Natural Oak Forests in Eastern Mountain Area of Liaoning Province[J]. 2017, 31(4): 135-140.
DOI：

Contents of Soil Organic Carbon and Its Relations with Physicochemical Properties of Secondary Natural Oak Forests in Eastern Mountain Area of Liaoning Province[J]. 2017, 31(4): 135-140. DOI： 10.13870/j.cnki.stbcxb.2017.04.022.

摘要

通过对设置在辽东山区本溪市草河口镇和庄河市仙人洞镇两个典型天然次生栎林（Quercus spp.）样地内的土样进行分层（0—10，10—20，20—30，30—40 cm）采集和室内分析，研究了0—40 cm土层土壤有机碳、全氮、全磷含量的剖面分布特征，探讨了有机碳与土壤理化性质间的关系。结果表明：土壤有机碳及全氮、全磷、全钾、碱解氮、速效磷、速效钾、阳离子交换量的含量均随土层加深而降低，而土壤容重随土层加深而增加，由t检验和方差分析得知，各指标含量在土层间差异均达到5%显著水平；土壤有机碳与粉粒、pH、全氮、全磷、全钾、碱解氮、速效磷、速效钾、阳离子交换量间均呈显著正相关（r=0.430 9～0.919 0，n=44，P＜0.01），与土壤容重、砂粒间均呈显著负相关（r=0.388 3～0.670 6，n=44，P＜0.01），而与粘粒间无显著相关性；由逐步回归分析得知土壤碱解氮、碳氮比、全钾、pH、全氮与有机碳间关系最为紧密。土壤有机碳与其他理化性质间关系密切，且以全氮、碱解氮、碳氮比、全钾和pH对其影响最大；同时，各指标均具有明显的剖面分布规律。

Abstract

Based on the sampling (0-10

10-20

20-30 and 30-40 cm) and lab analysis of two representative natural secondary oak forest plots in Liaodong mountain area

which was located in the town of Benxi City River Estuary and the fairy town of Zhuanghe City

the distribution characteristics of soil organic carbon

total nitrogen

and total phosphorus at the depth of 0-40 cm was studied

and the relationship between organic carbon and other physical and chemical properties was discussed. Results showed that soil organic carbon

total nitrogen

total phosphorus

total potassium

available nitrogen

available phosphorus

available potassium and cation exchange capacity tended to decline with the increasing soil depth

however soil bulk density generally increased with increasing soil depth. According to the t test and variance analysis

there was a significant difference between the experiment indicators and the soil layer (P<0.05). Moreover

the content of silt showed a very high positive correlation with the soil organic carbon

pH value

total nitrogen

total phosphorus

total potassium

alkaline hydrolysis nitrogen

available phosphorus

available potassium and cation exchange capacity (r=0.430 9~0.919 0

n=44

P<0.01). While soil bulk density and the content of sand had a significant negative correlation with soil organic carbon (r=0.388 3~0.670 6

n=44

P<0.01). But the content of clay had no significant correlation with soil organic carbon. Stepwise regression analysis showed that the relationship between soil available nitrogen

the ratios of carbon to nitrogen

total potassium

total nitrogen and organic carbon was the closest. Overall

there was close relationships between soil organic carbon and other physical and chemical properties

and the total nitrogen

available nitrogen

the ratios of carbon to nitrogen

total potassium and pH had big impact on it. At the same time

each index had obvious profiles distribution.

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