Changes in Carbon Cycling during Development of Successional Agroforestry
Changes in Carbon Cycling during Development of Successional Agroforestry
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DOI：
10.3390/agriculture7030025
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发表时间：
2017-03
期刊：
影响因子：
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通讯作者：
Tomas Selecky;S. Bellingrath‐Kimura;Yuji Kobata;M. Yamada;I. Guerrini;Helio makoto Umemura;D. A. Santos
中科院分区：
文献类型：
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作者：
Tomas Selecky;S. Bellingrath‐Kimura;Yuji Kobata;M. Yamada;I. Guerrini;Helio makoto Umemura;D. A. Santos
演替农林业系统（SAFS）模仿天然林的结构，同时提供经济产出。本研究阐明了在SAFS的演替过程中碳循环和碳固定是如何变化的。在巴西，三个连续阶段的SAFS，6，12和34岁，在碳平衡方面进行了比较。对林地生物量、果实收获量、凋落物量、土壤呼吸和土壤有机碳进行了两年的测定和分析。以净第一性生产力表示的固碳量随树龄的增加而增加，从6年生的9.8 Mg·C·ha −1 ·year −1增加到34年生的13.5 Mg·C·ha −1 ·year −1。植物生物量的积累和内部碳循环的增加导致了密集的固碳。SAFS可以成为脆弱热带土壤上农业生产的可持续方式。
Successional agroforestry systems (SAFS) mimic the structure of natural forests while providing economical outputs. This study clarifies how carbon cycling and carbon sequestration change during successional development of SAFS. In Brazil, three successional stages of SAFS, 6, 12, and 34 years old, were compared in terms of carbon balance. Aboveground biomass, fruit harvest, litterfall, soil respiration, and soil organic carbon were measured for two years and analyzed. Carbon sequestration expressed by net primary productivity increased with age of SAFS from 9.8 Mg·C·ha −1 ·year −1 in 6-year-old system to 13.5 Mg·C·ha −1 ·year −1 in 34-year-old system. Accumulation of plant biomass and increased internal carbon cycling in SAFS led to an intensive sequestration of carbon. SAFS can be a sustainable way of agricultural production on vulnerable tropical soils.