Ecological structure and carbon storage in traditional silvopastoral systems in Nicaragua
Ecological structure and carbon storage in traditional silvopastoral systems in Nicaragua
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DOI：
10.1007/s10457-018-0234-6
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发表时间：
2019-02-01
影响因子：
2.2
通讯作者：
Ibrahim, Muhammad
中科院分区：
文献类型：
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作者：
Cardenas, Aura;Moliner, Ana;Ibrahim, Muhammad
热带地区的森林和农林业系统在全球碳固定战略中起着决定性作用。覆盖的数量和类型，以及特定地区的具体土地利用和土地利用变化，决定了碳是被储存还是被释放到大气中。本研究的目的是通过生物量和土壤碳储量的定量分析，同时定性地确定树木丰富度和多样性的生态结构，对传统的银栖系统（TSPS）进行评价。这项研究是在尼加拉瓜半湿润的热带地区马提瓜斯进行的，涉及五种土地利用类型：灌木；干预次生林；林木密度高的草场；低树密度草地和退化草地。利用异速生长方程估算生物量碳，在0-10、10-20、20-40和40-100cm 4个深度评估土壤有机碳。在研究的土地利用方式中，灌木林地的多样性最高。退化草地和干预次生林的生物量碳含量分别在1.9 ~ 13.2tCha（-1）之间。干预次生林土壤有机碳储量最高（163tCha(-1)），退化草场土壤有机碳储量最低（76tCha(-1)）。由于有机碳是所有情况下最大的总碳库，因此应该至少在1米深的深度进行评估。增加退化和低树密度牧场的树木覆盖率不仅有助于加强碳固存，而且有助于恢复退化的牲畜景观土地。
Forests and agroforestry systems in the tropics play a decisive role in global carbon fixation strategies. The amount and type of coverage, along with the specific land use and land use change in a given area, determines whether carbon is stored or released into the atmosphere. The aim of this study was to evaluate the traditional silvopastoral systems (TSPS) through quantitative analysis of biomass and soil carbon storage whilst simultaneously qualitatively determining the ecological structure in terms of tree richness and diversity. The study was carried out in Matiguas, a sub-humid tropical region of Nicaragua, on five land use types: shrubland; intervened secondary forest; pasture with high tree density; pasture with low tree density and degraded pasture. Biomass carbon was estimated by allometric equations and soil organic carbon was evaluated at four depths (0-10, 10-20, 20-40 and 40-100cm). Of the land uses studied, shrubland had the highest diversity. The biomass carbon ranged from 1.9 to 13.2tCha(-1) for degraded pasture and intervened secondary forest, respectively. The highest soil organic carbon (SOC) storage at 1m depth was for intervened secondary forest (163tCha(-1)), whereas degraded pastures had the lowest value (76tCha(-1)). Since SOC was the largest pool of total carbon in all cases, it should be evaluated down to a depth of at least 1m. Increasing tree coverage in degraded and low-tree density pastures can contribute not only to enhance carbon sequestration but also to restore degraded lands in livestock landscapes.