连栽桉树人工林土壤有机碳氮储量及其分布特征

发布时间：2018-06-17 22:20

本文选题：桉树人工林 + 土壤有机碳　；参考：《热带作物学报》2017年10期

【摘要】：采用时空互换法,以广西东门林场不同栽植代数(1、2和3代)桉树人工林和邻近区域马尾松人工林为研究对象,分析桉树人工林连栽过程中土壤有机碳、全氮含量和储量及其分布特征。结果表明:(1)在0~20 cm土层,马尾松和1代、2代、3代桉树人工林有机碳含量分别为17.06、15.70、14.47和13.16 g/kg,土壤全氮含量分别为0.895、0.841、0.778和0.715 g/kg,均呈现随栽植代数的增加而下降的趋势,但在20~40 cm土层,马尾松和各栽植代数桉树林土壤有机碳和全氮含量无显著差异。(2)马尾松、1代、2代和3代桉树人工林0~40 cm土壤有机碳储量分别为66.84、56.57、52.97和50.81 t/hm~2,土壤全氮储量分别为3.78、3.33、3.09和2.98 t/hm~2,其中马尾松林和2、3代桉树林有机碳和全氮储量之间存在显著性差异(p0.05)。(3)相关分析表明,马尾松和不同栽植代数桉树人工林土壤有机碳含量与全氮含量均存在极显著相关性(p0.01),土壤有机碳、全氮与C/N之间也存在显著的相关关系(p0.05)。
[Abstract]:The soil organic carbon (SOC) of Eucalyptus plantations and Masson Pine plantations in adjacent areas were studied by using spatiotemporal exchange method in Dongmen Forest Farm of Guangxi, China. The soil organic carbon (SOC) was analyzed during continuous planting of Eucalyptus plantations. Total nitrogen content, reserves and their distribution characteristics. The results showed that the organic carbon contents of Pinus massoniana and Eucalyptus plantations were 17.06 ~ 15.70 ~ 14.47 and 13.16 g / kg in 0 ~ 20 cm soil layer, respectively, and the soil total nitrogen contents were 0.841 ~ 0.778 and 0.715 g 路kg ~ (-1), respectively. The results showed that the organic carbon content of Pinus massoniana and Eucalyptus plantations decreased with the increase of planting algebras, but in the 200-40cm soil layer, the soil total nitrogen content was 0.8950.41% 0.778 and 0.715 g 路kg ~ (-1), respectively. There was no significant difference in soil organic carbon and total nitrogen content between Pinus massoniana and eucalyptus plantation. 2.98 t / hm ~ 2, among which there was significant difference in organic carbon and total nitrogen storage between Pinus massoniana forest and the 2nd generation eucalyptus forest. The soil organic carbon content and total nitrogen content of Pinus massoniana and eucalyptus plantations were significantly correlated with total nitrogen content, and there was also a significant correlation between soil organic carbon, total nitrogen and C / N.
【作者单位】：广西大学林学院;广西国有东门林场;
【基金】：国家自然科学基金项目(No.31560206,31160152) 国家林业局中南速生材繁育重点实验室基金项目(No.2009-02) 广西林业科技重大项目(桂林科字[2010]第06号)
【分类号】：S714.2;S792.39

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