4 research outputs found
Using silvopastoral systems for the mitigation of greenhouse gas emissions from livestock in the Colombian Amazon
Silvopastoral systems (SPS) are strategic
in neutralizing greenhouse gases (GHG) emissions in
livestock production systems, particularly in the tropics.
This research assessed the mitigation potential of
SPS on the carbon footprint (CFP) neutralizing in one
integrated livestock farm of cow-calf and pig production
system in the Colombian Amazon. Annual carbon
accumulation rate (ACAR) in MgCO2e
ha−
1y−1, was
evaluated on living above-ground biomass including
trees and shrubs > 2 cm DBH and pasture, and leaf
litter and below-ground biomass including coarse
and fine roots, soil organic carbon 0–10 cm deep,
and total ACAR adding up all components in live
fences (LF), scattered trees (ST), fallows (FW), fodder
bank (FB) and pastures (PT). The GHG emissions
in MgCO2e
ha−
1y−1 were accounted in CO2
from liming,
urea, fuel, electricity, and supplementation, CH4
from enteric methane, manure, and organic fertilization
and N2O
from urine and manure. The C balance
was obtained from the differences between ACAR
of SPS on farm and the CFP per surface. Mean total
ACAR expressed in MgC ha−
1y−1 were 9.0 ± 4.6
in FW, 7.0 ± 1.2 in LF, 5.5 ± 0.8 in ST, 4.2 ± 0.2
in FB and 2.9 ± 0.1 in PT. Mean CFP was 3.7
MgCO2e
ha−
1y−1, 5.3 MgCO2e
Live Weight ha−
1y−1,
and 23.6 MgCO2e
Live Weight Gain y−
1. The CFP
(area) can be neutralized with total ACAR value of
2.1 ha−
1 for LF, 1.6 ha−
1 for FW, 2.6 ha−
1 for ST,
3.5 ha−
1 for FB and 5.1 ha−
1 for PT. The Silvopastoral
systems have a higher potential for neutralizing GHG
emissions than pasture-based scenario when considering
the ACAR in above-ground biomass.info:eu-repo/semantics/publishedVersio
Evaluación de la abundancia de Ceratopogonidos (Díptera) polinizadores de Cacao (Theobroma cacao L.) en la hojarascada de 7 árboles de sombra, Talamanca-Costa Rica
In the community of Watsi, Bri-Bri Indigenous Town, southwest of Costa Rica, Canton of Talamanca, Limon Province, located at 9 ° 37 '26.3 "N and 82 ° 52' 53.1" W, with a height between 70 and 180 masl, the abundance of genus Forcipomyia, Atrichopogon, Dasyhelea (Diptera: Ceratopogonidae) insects pollinators of cocoa was assessed and its main natural enemies Dermaptera, Chillopoda and Formicidae, we analyzed the litter of banana Musa AAA, laurel Cordia alliodora, Rambutan Nephelium lappaceum, guaba Inga sp, pejivalle Bactris gasipaes, avocado Persea americana, apple water Syzygium malaccense type shade used and cocoa Theobroma cacao not shaded as control treatment. Litter samples were taken of each species, the larvae were count and adults were breeding in emergency traps under moist controlled conditions, the valued variables were number of Ceratopogonidae, natural enemies, percentage of shade and sample`s wet weight. Data analysis was performed using Friedman's nonparametric test and multivariate analysis. We found that the most litter studied offered suitable conditions for breading of larvae and adult insects Forcipomyia genus pollinators of cocoa.
Key words: percentage of shade, wet weight, natural enemies, agroforestry systemsCentro Agronómico Tropical de Investigación y Enseñanza (CATIE-MAP
Evaluación de la abundancia de ceratopogonidos (Díptera) polinizadores de cacao (Theobroma cacao L.) en la hojarasca de 7 árboles de sombra, Talamanca - Costa Rica
Tesis (Ing.Agrof.)En la comunidad de Watsi, Pueblo indígena Bri-Bri, suroeste de Costa Rica, Cantón de Talamanca, Provincia de Limón, localizada a 9° 37' 26,3" N y 82° 52' 53,1" W, con una altura entre 70 y 180 msnm, se evaluó la abundancia de los géneros Forcipomyia, Atrichopogon, Dasyhelea (Díptera: Ceratopogonidae) insectos polinizadores de cacao y sus principales enemigos naturales Dermápteras, Chillópodos y Formicidos; se analizó la hojarasca de: Banano Musa AAA, laurel Cordia alliodora, mamón chino Nephelium lappaceum, guaba Inga sp, pejivalle Bactris gasipaes, aguacate Persea americana, manzana de agua Syzygium malaccense especies utilizadas como sombrio y cacao Theobroma cacao sin sombra como tratamiento control. Se tomaron muestras de hojarasca de cada especie, se contaron las larvas y se criaron adultos en trampas de emergencia bajo condiciones controladas de humedad, las variables evaluadas fueron número de individuos de Ceratopogonidos, enemigos naturales, porcentaje de sombra y peso húmedo de la muestra. El análisis de datos se realizó mediante prueba no paramétrica de Friedmann y análisis multivariado de componentes principales. Se encontró que la mayoría de los sustratos estudiados ofrecen condiciones favorables para la reproducción de larvas e insectos adultos del género Forcipomyia polinizador de cacao.Universidad de Nariño. Facultad de Ciencias Agrícola