Data/hora: 03/06/2024 11:22:29

Provedor de dados: | Revista Brasileira de Ciência do Solo
País: | Brazil
Título: | Compaction of an Oxisol and chemical composition of palisadegrass
Autores: | Sousa Neto,Eurico Lucas de; Pierangeli,Maria Aparecida Pereira; Lal,Rattan.
Data: | 2013-08-01
Ano: | 2013
Palavras-chave: | Crude protein; Relative compaction; Urochloa.
Resumo: | Compaction is an important problem in soils under pastoral land use, and can make livestock systems unsustainable. The objective of this research was to study the impact of soil compaction on yield and quality of palisade (UROCHLOA BRIZANTHA cv. Marandu). The experiment was conducted on an Oxisol in the State of Mato Grosso, Brazil. Treatments consisted of four levels of soil compaction: no compaction (NC), slight compaction (SC), medium compaction (MC) and high compaction (HC). The following soil properties were evaluated (layers 0-0.05 and 0.05-0.10 m): aggregate size distribution, bulk density (BD), macroporosity, microporosity, total porosity (TP), relative compaction (RC), and the characteristics of crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF) and dry matter yield (DMY) of the forage. Highly compacted soil had high BD and RC, and low TP (0-0.05 m). Both DMY and CP were affected by HC, and both were strongly related to BD. Higher DMY (6.96 Mg ha-1) and CP (7.8 %) were observed in the MC treatment (BD 1.57 Mg m-3 and RC 0.91 Mg m-3, in 0-0.05 m). A high BD of 1.57 Mg m-3 (0-0.05 m) did not inhibit plant growth. The N concentration in the palisade biomass differed significantly among compaction treatments, and was 8.72, 11.20, 12.48 and 10.98 g kg-1 in NC, SC, MC and HC treatments, respectively. Increase in DMY and CP at the MC level may be attributed to more absorption of N in this coarse-textured soil.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400010
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832013000400010
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.37 n.4 2013
Fonte: | info:eu-repo/semantics/openAccess