Title:	Particulate organic carbon in agrosystems in the brazilian Semiarid.
Authors:	SANTANA, M. da S. ANDRADE, E. M. de GIONGO, V.
Affiliation:	MÔNICA DA SILVA SANTANA, Universidade Federal do Ceará; EUNICE MAIA DE ANDRADE, Universidade Federal do Ceará; VANDERLISE GIONGO, CPATSA.
Date Issued:	2018
Citation:	In: WORLD CONGRESS OF SOIL SCIENCE, 21., 2018, Rio de Janeiro. Soil science: beyond food and fuel: proceedings. Rio de Janeiro: SBCS, 2018.
Description:	Drylands cover about 40% of the planet, in which 44% are occupied with cultivated systems. Covering 45% of Brazilian Semiarid the grasslands are main land use this region. In order to increase biomass production and provide food for goats, sheep and bovines are implanted different agrosystems with differences species Cenchurs ciliairis L. (CC), Opuntia ficus indica Mill. (OF), Gliricidia sepium Jacq. (Walp.) (GS), Leucaena leucocephala Lam. De Wit. (LL). However, with removal of native vegetation (NV) there is a change in supply plant material and hence in soil organic matter (SOM), which is formed by substances in different stages of decomposition. Among the chemical components contained in SOM is carbon (C), the main structuring element of nature. In soils, the C can be in the form particulate organic carbon (POC), coming from the biotic residues being quite susceptible to change of land use, and mineral-associated carbon fraction formed by organomineral complexes that are not available to decomposition . POC is associated with the active compartment and can be lost more eas ly, depending on land use. In sense, to evaluate how the introduction of new species for animal feeding can modify the POC, soil samples were collected at following depths: 0-5, 5-10, 10-15, 15-20, 20-30, 30- 40 cm, with four replicates for uses with different ages: NV (always preserved), CC (30 yr), OF (21 yr), GS (17 yr) and LL (24 yr). The air dried soil was separated in a 53 ?m sieve, where the particles larger than >53 ?m corresponded to POC.
Thesagro:	Dióxido de Carbono Solo Uso da Terra Matéria Orgânica
NAL Thesaurus:	Soil organic carbon Dryland farming Soil organic matter
Keywords:	Agroecossistema Carbono orgânico do solo Agricultura de terras áridas Semiárido
Type of Material:	Resumo em anais e proceedings
Access:	openAccess
Appears in Collections:	Resumo em anais de congresso (CPATSA)