巴西南部桉叶采伐对沙质土壤碳储量及指数的影响

IF 2.9 Q2 SOIL SCIENCE
Jackson Freitas Brilhante de São José, Luciano Kayser Vargas, Bruno Britto Lisboa, Frederico Costa Beber Vieira, Josiléia Acordi Zanatta, Elias Frank Araujo, Cimelio Bayer
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引用次数: 0

摘要

目前对亚热带桉树采伐剩余物管理对土壤有机碳(SOC)影响的研究较少。本研究评价了桉树采伐剩余物管理对土壤C指数的影响:AR,所有森林剩余物都留在土壤中;注意,树皮被去除;NBr,其中的分支被移除;NR,去除所有残留物;NRs与NR相同,但也使用遮荫网来防止新人工林的凋落物到达土壤表面。0 ~ 20 cm和0 ~ 100 cm土壤深度的碳储量随着桉树采伐剩余物的碳输入呈线性增加。在0 ~ 20 cm土层,NR处理的土壤碳保持率最低,为0.23 Mg ha−1年−1,AR处理的土壤碳保持率最低,为0.68 Mg ha−1年−1。在0 ~ 100 cm层,AR的碳滞留率最高(1.47 Mg ha−1 year−1)。腐殖化系数高(k1 = 0.23),有机质分解率高(k2 = 0.10)。碳管理指数与碳输入和胸高树径密切相关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Soil Carbon Stock and Indices in Sandy Soil Affected by Eucalyptus Harvest Residue Management in the South of Brazil
There has been limited research on the effect of eucalyptus harvest residue management on soil organic carbon (SOC) in subtropical environments. This research evaluated the effect on soil C indices of the following eucalyptus harvest residue managements: AR, with all forest remnants left on the soil; NB, where bark was removed; NBr, in which branches were removed; NR, which removed all residues; and NRs, which is same as NR but also used a shade net to prevent the litter from the new plantation from reaching the soil surface. C stocks within the soil depths of 0–20 cm and 0–100 cm increased linearly with the C input from eucalyptus harvest residues. In the layer of 0–20 cm, the lowest soil C retention rate was 0.23 Mg ha−1 year−1, in the NR treatment, while in the AR treatment, the retention rate was 0.68 Mg ha−1 year−1. In the 0–100 cm layer, the highest C retention rate was obtained in the AR (1.47 Mg ha−1 year−1). The residues showed a high humification coefficient (k1 = 0.23) and a high soil organic matter decomposition rate (k2 = 0.10). The carbon management index showed a close relationship with the C input and tree diameter at breast height.
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来源期刊
Soil Systems
Soil Systems Earth and Planetary Sciences-Earth-Surface Processes
CiteScore
5.30
自引率
5.70%
发文量
80
审稿时长
11 weeks
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