Forage Dry Matter Accumulation And Tiller Population Density Of Guineagrass Fertilized With Different Potassium Sources

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Trabalho

Título do Trabalho

FORAGE DRY MATTER ACCUMULATION AND TILLER POPULATION DENSITY OF GUINEAGRASS FERTILIZED WITH DIFFERENT POTASSIUM SOURCES

Autores

Stefany Thayssiane da Silva
Ewerton Cavalcante Massena
João Antonio Rosa Ferreira Pinto
Brayan Alexi Torres Roa
Juliana Prado de Almeida
Luís Carlos Vinhas Itavo
Gelson dos Santos Difante
Cid Naudi Silva Campos
Paulo Eduardo Teodoro
Vanessa Zirondi Longhini

Modalidade

Resumo científico RSD 2026 - abstract - resumen

Área temática

1) Produção Animal - Animal production - Producción animal

Data de Publicação

28/08/2026

País da Publicação

Brasil

Idioma da Publicação

pt-BR

Página do Trabalho

https://www.even3.com.br/anais/anais-ecpantanaltech/1641665-forage-dry-matter-accumulation-and-tiller-population-density-of-guineagrass-fertilized-with-different-potassium-

ISSN

Palavras-Chave

organic fertilizer; Panicum maximum; tillering.

Resumo

Panicum maximum ‘BRS Quênia’ is a highly productive tropical forage grass whose establishment and development depend heavily on soil nutrient availability. Among the essential macronutrients for plant growth, potassium (K) plays a vital role in several physiological processes. In this context, the search for alternative fertilization sources, such as organic fertilizers and natural minerals, has emerges as a strategic approach to improving nutrient-use efficiency and the sustainability of pasture production systems. Therefore, this study aimed to evaluate the effects of different K sources on forage dry matter accumulation (FDMA) and tiller population density (TPD) of Quênia guineagrass (Panicum maximum ‘BRS Quênia’). The experiment was conducted using a randomized complete block design with five replicates, in which pots containing 4 dm³ of soil served as the experimental units. Three K sources were evaluated: potassium chloride (KCl), natural potassium-bearing rock (KMC), and organic fertilizer. The soil used was a typical dystrophic Red Oxisol. Lime and basal fertilizer were applied 40 d before sowing. Potassium sources were applied at sowing, and the sowing was performed by distributing 32 seeds per pot. Micronutrient solutions were applied weekly, and nitrogen was supplied at sowing and after each harvest. Thinning was carried out to maintain two plants per pot. Evaluations were conducted every 28 days after a uniformity cut, totaling four evaluation cycles. The FDMA was determined at each harvest at a residual height of 20 cm, and the TPD was obtained by counting the total number of tillers per pot. Data were analyzed using the MIXED procedure of SAS statistical software, blocks were treated as random effects, whereas potassium sources, evaluation cycles, and their interaction were treated as fixed effects. When significant, treatment means were compared using the LSD test at a 5% significance level. Potassium fertilizer sources significantly affected FDMA (P = 0.046). The organic fertilizer provided the highest FDMA (3.2 ± 0.16 g DM/pot), whereas KCl and KMC produced similar values (averaged 2.7 ± 0.16 g DM/pot). The use of organic fertilizer increased FDMA by 14% compared with the other K sources. In contrast, no significant differences in TPD were observed across K sources (averaged of 14 ± 0.6 tillers/pot). In conclusion, organic fertilizer promotes greater FDMA in Quênia guineagrass compared to KCl and KMC, represents a viable alternative potassium source for this forage species, although the different K sources do not affect TPD.

Título do Evento: II Encontro Técnico-Científico do Pantanal Tech MS 2026
Cidade do Evento: Aquidauana
Título dos Anais do Evento: Anais do Encontro Técnico-Científico do Pantanal Tech MS
Nome da Editora: Even3
Meio de Divulgação: Meio Digital

Como citar

SILVA, Stefany Thayssiane da et al.. FORAGE DRY MATTER ACCUMULATION AND TILLER POPULATION DENSITY OF GUINEAGRASS FERTILIZED WITH DIFFERENT POTASSIUM SOURCES.. In: . Disponível em: https//www.even3.com.br/anais/anais-ecpantanaltech/1641665-FORAGE-DRY-MATTER-ACCUMULATION-AND-TILLER-POPULATION-DENSITY-OF-GUINEAGRASS-FERTILIZED-WITH-DIFFERENT-POTASSIUM-. Acesso em: 29/08/2026