Keywords
coffee plantation
agroforestry systems
soil carbon
Mexico
How to Cite
Abstract
This study was conducted with the aim of estimating carbon stocks in coffee-based agroforestry sys¬tems (AFS) in the Huatusco region, a major coffee (Coffea arabica L.) producing area in the state of Veracruz, Mexico, in order to obtain quantitative data on the carbon mitigation potential of major agro¬forestry systems in that region. To this end, carbon stocks were estimated for plant biomass and soil organic matter in the following agroforestry systems: coffee-banana, coffee-macadamia, coffee-pink cedar, coffee-sheep and coffee-Inga spuria, as well as a primary forest and a grazing land for com¬parative purposes. The samples were collected from 4 x 25 m (100 m2) plots for tree biomass, herbs and litter; for soil, the sampling depth was 0 to 30 cm. The highest amount of aboveground carbon, estimated using allometric models, was recorded for coffee-pink cedar (Co + Ce), with 114 Mg C•ha-1, followed in descending order by: coffee-macadamia (Co + Ma), with 34 C Mg•ha-1; coffee-Inga spuria (Co + In), with 29 C Mg•ha-1; coffee-banana (Co + Ba), with 27 Mg C•ha-1; and lastly the grazing land (G) with 2 Mg C•ha-1. For soil organic carbon, the Co + Ce treatment had the highest amount with 58 Mg C•ha-1, while the grazing land (G) had the lowest with 50 Mg C•ha-1. As far as total organic carbon is concerned, the maximum amount of 172 Mg C•ha-1 was found in Co + Ce and the minimum, 65 Mg C•ha-1, in the grazing land. In conclusion, among the coffee-based systems studied, the average carbon stock is 102 Mg C•ha-1, compared to 52 Mg C•ha-1 for the grazing land and 355 Mg C•ha-1 for the primary forest, which stores the most total carbon.
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