Suárez, Leonardo Rodríguez  Audor, Leidy Carolina Ule  Salazar, Juan Carlos Suárez  <br/><br/>
Formation of Macroaggregates and Organic Carbon in Cocoa Agroforestry Systems 

<br/><br/> Publicação on-line; 34 ref.; 6 tables; 4 illus.; Summary (En) 
<br/><br/> <br/><br/>ABSTRACT<br/><br/>The objective of this study was to analyze the biological contribution to macroaggregate formation<br/>under cocoa agroforestry systems, as well as to evaluate the potential of macroaggregates to store<br/>carbon. The variation of the populations of macrofauna and the relationship with the morphology<br/>of aggregates was monitored in five agroforestry systems associated with cocoa established from<br/>different land uses, taking as reference the forest and pasture. Some cacao agroforestry systems<br/>favored the presence of macrofauna functional groups similar to the forest (p < 0.05). According<br/>to the principal component analysis, the effect of land use on macroaggregate formation is highly<br/>significant (p < 0.001) and explained 55% of the total variance. The macrofauna and macroaggregates<br/>showed significant covariation (RV = 0.22, p-value = 0.001). Biogenic macroaggregates contained<br/>more carbon when they came from agroforestry systems.<br/><br/>Keywords: soil macrofauna, functional groups, co-inertia analysis. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>FAUNA EDÁFICA<br/>CARBONO<br/>CACAU<br/>SOLO