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Publicação
Can dairy slurry application to stubble, without Incorporation into the soil, be sustainable?
Orientador(es)
Resumo(s)
In many countries, livestock slurry must be injected or incorporated into the soil to reduce
nitrogen losses. However, when the injection is not feasible, farmers adopting conservation practices
discard the use of slurry as fertilizer. New approaches related to slurry treatment or application
management can stimulate the use of slurry in conservation agriculture (CA). This study aimed to
evaluate the agronomic effects of some new management strategies to use dairy slurry for fertilization
of ryegrass grown on stubble-covered soil, using as reference standard practices (slurry injection
and mineral fertilizer application). The following treatments were considered: (i) bare soil: control
(CB), mineral fertilizer (MB), injection (IN); (ii) stubble: control (CS), acidified dairy slurry (ADS),
raw dairy slurry (RDS), irrigation following RDS (IR), mineral fertilizer (MS), RDS placed under the
stubble (US), raw slurry applied 16 days after sowing (RDS T16). Effects on ryegrass yield, apparent
nutrient recovery (ANR) and soil chemical properties were assessed. ADS reached 94% equivalence
to MS and performed similarly to IN for productivity, ANR and soil parameters showing to be a
sustainable alternative to replace mineral nitrogen and a potential solution to enable dairy slurry
application in CA without injection or incorporation into the soil.
Descrição
Palavras-chave
acidified slurry mineral fertilizer nitrogen nutrient use efficiency no-tillage conservation agriculture ryegras ARN N-MFE
Contexto Educativo
Citação
Silva, A.A.; Carvalho, M.; Coutinho, J.; Vasconcelos, E.; Fangueiro, D. Can dairy slurry application to stubble, without Incorporation into the soil, be sustainable?. Plants 2022, 11, 1473
Editora
MDPI