Data/hora: 18/06/2024 11:00:19

Biblioteca(s): | Epagri-Sede.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | Internacional - B
Data corrente: | 01/11/2019
Data da última atualização: | 01/11/2019
Autoria: | SANTOS, L. H.; CANTON, L.; VENTURA, B. S.; FERREIRA, G. W.; KURTZ, C.; BRUNETTO, G.; COMIN, J. J.; LOVATO, P. E.; LOSS, A.
Título: | Chemical Properties in Macroaggregates of a Humic Dystrudept Cultivated with Onion under No-Till and Conventional Tillage Systems.
Ano de publicação: | 2017
Fonte/Imprenta: | Revista Brasileira de Ciência do Solo, Viçosa, MG, v.41, p. 1-13, 2017.
Idioma: | Inglês

Conteúdo:

Nutrients present in soil aggregates are essential for maintaining the productive
capacity of agroecosystems and environmental quality. The aim of this study was to evaluate
the chemical properties of macroaggregates of a Humic Dystrudept cultivated with onions
under a no-till vegetable system (NTVS) compared to the conventional tillage system (CTS)
and a forest area in Ituporanga, SC, Brazil. The treatments consisted of the following single
and mixed cover crops with onion under the NTVS: spontaneous vegetation, 100 % black
oats, 100 % rye, 100 % oilseed radish, intercropped oilseed radish (14 %) + rye (86 %),
and intercropped oilseed radish (14 %) + black oat (86 %). Additionally, we evaluated
two areas, one with onion grown under the CTS for ±37 years and an area under forest
for ±30 years, both adjacent to the experiment. Five years after implementation of the
treatments with cover crops, we collected undisturbed soil samples at depths of 0.00-0.05,
0.05-0.10, and 0.10-0.20 m, and we obtained macroaggregates (8.00 mm > Ø &#8805; 2.0 mm).
We analyzed total organic carbon (TOC), pH in water, Ca2+, Mg2+, Al3+, H+Al, K+, and P in
the macroaggregates. The conversion of onion-growing areas from the CTS to the NTVS
after fve years increases TOC, pH, Ca, Mg, and K in soil macroaggregates at the depth
of 0.00-0.05 m. There is increased K content in the macroaggregates of soil under the
NTVS at all depths evaluated in this study compared to the CTS. The use of millet in
the CTS increases P content at depth (0.05-0.10 and 0.10-0.20 m). Intercropping black
oat + oilseed radish increases Ca content at the 0.10-0.20 m depth in comparison to the
black oat, rye + oilseed radish, and control treatments, and increases Mg content as well,
compared to the other cover crops at the depths of 0.05-0.10 and 0.10-0.20 m.

Palavras-Chave: | Alliun cepa L; nutrients; organic carbon in aggregates; soil structure; sustainable agriculture.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_43755.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
Exemplares: | Epagri-Sede - (104071-1) - UPC - AP - DD -  -  -  - DIS