Title:	Increasing yield and carbon sequestration in a signalgrass pasture by liming and fertilization in São Carlos, São Paulo, Brazil.
Authors:	BERNARDI, A. C. de C. SEGNINI, A. PRIMAVESI, O. M. A. S. P. R. OLIVEIRA, P. P. A. PEZZOPANE, J. R. M. BERNDT, A. BAYER, C. MILORI, D. M. B. P. SILVA, W. T. L. da SIMOES, M. L. MARTIN NETO, L.
Affiliation:	ALBERTO CARLOS DE CAMPOS BERNARDI, CPPSE; ALINE SEGNINI, USP; ODO MARIA ARTUR S P R PRIMAVESI, CPPSE; PATRICIA PERONDI ANCHAO OLIVEIRA, CPPSE; JOSE RICARDO MACEDO PEZZOPANE, CPPSE; ALEXANDRE BERNDT, CPPSE; CIMÉLIO BAYER, UFRGS; DEBORA MARCONDES BASTOS PEREIRA, CNPDIA; WILSON TADEU LOPES DA SILVA, CNPDIA; MARCELO LUIZ SIMOES, CNPDIA; LADISLAU MARTIN NETO, CNPDIA.
Date Issued:	2021
Citation:	In: FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS. Recarbonizing global soils: a technical manual of recommended management practices. Rome: FAO, 2021. (Cropland, grassland, integrated systems and farming approaches: case studeis, v.4). Cap. 32.
Pages:	p.352-363.
Description:	This study case aimed to evaluate the impact of liming and mineral fertilization of a Signalgrass pasture on C accumulation in surface and deeper layers of a Brazilian Oxisol. A 27-yr old Signalgrass pasture ((Urochloa decumbens cv. Basilisk Stapf (Syn: Brachiaria)) was used in the trial. This pasture has been grazed in a stocking rate of one animal per ha and did not receive any liming and fertilizer until the beginning of the experiment. Treatments used in a 6-year trial are described in Table 129, and both limestone and fertilizers were applied to the soil surface with no soil plowing or disc-harrowing. Soil C stocks were calculated in equivalent soil mass, taking the native Cerrado (Savanna forest) soil mass as reference. Limed soil (0-100 cm) under non-fertilized pasture showed an annual increase of 1.71 tC/ha after 6 years over the soil under native vegetation. In contrast, fertilization of low productive and degraded pasture resulted in C accumulation rates varying from 5.4 to 7.2 t/ha/yr. The results illustrate that despite the C saturation in the surface soil layer, as evidenced by a sigmoid relationship between C contents in the whole soil and the clay fraction through the soil profile, the large proportion of C accumulation (from 55 to 68 percent) in deeper soil layers makes tropical pasture soils suitable long-term C sinks.
NAL Thesaurus:	Soil management Liming No-tillage Grasslands Greenhouse gas emissions
Keywords:	Mineral fertilization Soil organic carbon stocks Adaptation to climate change Mitigation to climate change Potential drawbacks ILPF
ISBN:	978-92-5-134897-0
Type of Material:	Parte de livro
Access:	openAccess
Appears in Collections:	Capítulo em livro científico (CPPSE)