Dynamics of Carbon and Soil Enzyme Activities under Arabica Coffee Intercropped with Brachiaria decumbens in the Brazilian Cerrado

Author:

de Sousa Thais Rodrigues1ORCID,de Carvalho Arminda Moreira2ORCID,Ramos Maria Lucrécia Gerosa1ORCID,de Oliveira Alexsandra Duarte2ORCID,de Jesus Douglas Rodrigues1ORCID,da Fonseca Ana Caroline Pereira1ORCID,da Costa Silva Fernanda Rodrigues1ORCID,Delvico Francisco Marcos dos Santos2,Junior Fábio Bueno dos Reis2ORCID,Marchão Robélio Leandro2ORCID

Affiliation:

1. Faculty of Agronomy and Veterinary Medicine, University of Brasilia, Campus Darcy Ribeiro, Brasilia 70910-970, DF, Brazil

2. Embrapa Cerrados, BR-020, Km 18, Planaltina 73310-970, DF, Brazil

Abstract

The change in land use in the Brazilian Cerrado modifies the dynamics of soil organic matter (SOM) and, consequently, carbon (C) stocks and their fractions and soil enzyme activities. This study evaluated the effect of brachiaria (Brachiaria decumbens Stapf.) intercropped with Arabica coffee (Coffea arabica L.) on the stock and fractions of soil carbon and enzyme activities. The experiment was arranged in a completely randomized block design with three replications and treatments in a factorial design. The first factor consisted of coffee with or without intercropped brachiaria, the second of Arabica coffee cultivars (‘I.P.R.103’ and ‘I.P.R.99’) and the third factor of the point of soil sampling (under the canopy (UC) and in inter-rows (I)). Soil was sampled in layers of 0–10, 10–20, 20–30, 30–40, 40–60 and 60–80 cm. Soil from the 0–10 cm layer was also used to analyze enzymatic activity. Significant effects of coffee intercropped with brachiaria were confirmed for particulate organic carbon (POC), with highest contents in the 0–10 and 20–30 cm layers (9.62 and 6.48 g kg−1, respectively), and for soil enzymes (280.83 and 180.3 μg p-nitrophenol g−1 for arylsulfatase and β-glucosidase, respectively).

Funder

Fundação de Apoio a Pesquisa do Distrito Federal—FAPDF

Publisher

MDPI AG

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