Tifton 85 grass performance following chemical and organic fertilizers

Naiara Taís Alves da  Silva; Alex de Matos Teixeira; Lúcio Carlos Gonçalves; Daniel Ottoni; Luigi Francis Lima Cavalcanti; Thaís Figueiredo Pereira; Flávia Cristina de Oliveira e Silva; Diogo Gonzaga Jayme

doi:10.14393/BJ-v39n0a2023-63730

Authors

Naiara Taís Alves da Silva Universidade Federal de Minas Gerais
Alex de Matos Teixeira Universidade Federal de Uberlândia https://orcid.org/0000-0003-0338-8891
Lúcio Carlos Gonçalves Universidade Federal de Minas Gerais https://orcid.org/0000-0001-9781-1042
Daniel Ottoni Escola de Veterinária do Centro Universitário Newton Paiva
Luigi Francis Lima Cavalcanti Intergado
Thaís Figueiredo Pereira Universidade Federal de Minas Gerais
Flávia Cristina de Oliveira e Silva Universidade Federal de Minas Gerais https://orcid.org/0000-0002-3004-8959
Diogo Gonzaga Jayme Universidade Federal de Minas Gerais https://orcid.org/0000-0003-1838-2732

DOI:

https://doi.org/10.14393/BJ-v39n0a2023-63730

Keywords:

Cynodon spp., Fertilization, Nutritional value.

Abstract

The Tifton 85 grass offers high yield and nutritional value. It is demanding in soil fertility and highly responsive to fertilization. However, the response to fertilization can be affected by the source, dose, and installment of fertilizers, as well as environmental conditions. Evaluations of the joint application of chemical and organic fertilizers are scarce. Therefore, this study aimed to evaluate the effect of chemical and organic fertilization on agronomic characteristics, mineral use efficiencies, and bromatological composition of Tifton 85 grass, and determine fertilization strategies to optimize the yield and nutritional value of Tifton 85 grass. The findings were influenced by grass cuttings. The highest values for height and accumulated dry matter productivity were obtained with the highest fertilizer doses. The leaf/stem ratio was not affected by fertilization. The highest mineral use efficiencies were obtained with 200 and 400 kg of N/ha/year of NPK 20-00-20 formulation and up to 10 t/ha/year of poultry litter (PL), and these values decreased when applying high PL doses. The crude protein content increased, while the contents of neutral detergent fiber and acid detergent fiber decreased. The protein fractions and in vitro dry matter digestibility were not affected by fertilization. The potassium content increased with high fertilizer doses. Applying 350 to 400 kg of N/ha/year of NPK 20-00-20 formulation and 25 to 30 t/ha/year of PL promoted the highest accumulated dry matter productivity. Applying 200 to 400 kg of N/ha/year of NPK 20-00-20 formulation and 10/ha/year of PL is recommended for optimizing mineral use efficiencies. As for bromatological composition, increasing the doses of both fertilizers was beneficial in reducing fiber contents, but only organic fertilization increased crude protein content.

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Author Biography

Naiara Taís Alves da Silva, Universidade Federal de Minas Gerais

Bacharel em Zootecnia. Mestre e Doutora em Zootecnia - Nutrição de Ruminantes pela Escola de Veterinária da Universidade Federal de Minas Gerais.

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