Banca de DEFESA: LUCIELY BORDALLO DA CONCEIÇÃO CHAGAS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LUCIELY BORDALLO DA CONCEIÇÃO CHAGAS
DATE: 31/01/2023
TIME: 14:00
LOCAL: Miniauditório, bloco 2, UFRA, campus de Parauapebas
TITLE:

PRODUCTION AND SILAGE QUALITY OF FORAGE SORGHUM INOCULATED WITH Azospirillum brasilense AND NITROGEN DOSES

KEY WORDS:

Bolivian giant sorghum, inoculation;nitrogen fixing bacteria

PAGES: 41
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Pastagem e Forragicultura
SPECIALTY: Avaliação, Produção e Conservação de Forragens
SUMMARY:

The objective was to evaluate the inoculation with Azospirillum brasilense bacteria associated with nitrogen fertilization in topdressing on agronomic and bromatological characteristics of forage sorghum silage. A randomized block design was used, in a 5x2 factorial scheme, composed of four nitrogen doses (0; 50; 100; 200; 400 kg ha-1) and the presence or absence of inoculation with A. brasilense with four replications. Plant height (PL), stem diameter (SD), first cycle productivity (FCD); regrowth yield (RV), total yield (TV) of forage sorghum; the terrors of dry matter (DM), ash, crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), total digestible nutrients (TDN), in vitro digestibility (IVDMS), in vitro digestibility neutral detergent fiber (IVDNDF); ammonia nitrogen (N-NH3), organic acids (LAC, ACE and BUT), dry matter recovery (DMR) and pH values of forage sorghum silages. No interaction was detected between inoculation and nitrogen fertilization for (PL), (SD), (RV) and (TV). However, isolated effects of nitrogen fertilization were observed for PL and SD, with PL being higher at the dose of 200 kg N.ha-1 and from the dose of 50 kg N.ha-1 higher SD occurred in sorghum plants.  Interaction between inoculation and nitrogen fertilization was observed for FCD, and nitrogen doses of 200 and 400 kg N.ha-1 showed lower values with inoculation. Sorghum ProdT was lower with inoculation and higher at the dose of 200 kg N.ha-1, being approximately 29.42% higher compared to the control treatment.. The CP content showed an isolated effect of inoculation and nitrogen fertilization, increasing the CP levels. An isolated effect of nitrogen fertilization on IVDM was observed. No effects were observed for DMR, IVDNDF and TDN. The use of inoculation with Azospirillum brasilense does not favor increases in the agronomic characteristics of forage sorghum and reduces productivity at nitrogen rates of 200 and 400 kg ha-1. However, the association does not influence the main fermentative characteristics of sorghum silage. Inoculation with Azospirillum brasilense and nitrogen fertilization increases the protein and fiber contents of sorghum silage.

BANKING MEMBERS:
Presidente - 1143911 - RAYLON PEREIRA MACIEL
Interno - 1067653 - PERLON MAIA DOS SANTOS
Externa à Instituição - ROMILDA RODRIGUES DO NASCIMENTO
Externa à Instituição - SHEILA VILARINDO DE SOUSA