Avaliação de plantas e da silagem do sorgo forrageiro (Sorghum bicolor (L.) Moench) em função de adubações orgânica e mineral

• Ano de defesa: 2015
• Autor(a) principal: Lucena, Nagnaldo Tavares de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal da Paraíba; Brasil; Zootecnia; Programa de Pós-Graduação em Zootecnia; UFPB
• Palavras-chave em Português: Sorgo forrageiro; Forragem – Adubação orgânica; Altura de planta; Panícula; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::PASTAGEM E FORRAGICULTURA
• Link de acesso: https://repositorio.ufpb.br/jspui/handle/123456789/15921

The objective of the research was to evaluate the growth, productivity and silage sorghum forage BRS Ponta Negra according to organic or mineral fertilizers. The research was conducted in Fanzenda Mata Limpa, Areia-PB. The 166 days trial period after planting on 06 of Junho, 2013. To evaluate the characteristics mofometricas, morphological and morphogenesis, the desing experimental blocks were randomized, on scheme factorial 3x4, three fertilization sources (two organic and mineral), with four replicates: unfertilized, urea ( 50,100,150 kg N/ha), chiken litter (5,10 and 15 Mg/ha) and cattle manure (5,10 and 15 Mg/ha). For evaluations of silage characteristics, the design was completely randomized, with the above-described treatments and three replicates per treatment. Data were subjected to analysis of variance and regression to evaluate the effect of levels of organic and mineral fertilizers. The characteristics evaluated were: plant height (AP), stem diameter (DC), number of plants per hectare (NP), number of leaves (NF), average leaf length (CMF), number of lodged plants (NplaAca), production of green matter (PMV) and dry matter production (PMS), and leaf appearance rate (TApF), rate leaf elongation (TAlF) and stem elongation rate (TAlC). According to the results, there was no effect (P> 0.05) the sources of fertilizer for variables mofometricas, NplaAca and NPLA. The effect of nitrogen source for AP and DC was more pronounced with poultry litter, with values of 233.5 and 297.2 cm for the level 0 and 15 Mg ha-1. For TAlC, there was no effect (P> 0.05). The PMV showed response linear increase in effect (P<0,05) in fertilization organic with variations of 39.089,4 t.ha-1 to 55.831,7 t.ha-1. The PMS got higher production from fertilization poultry litter ranging 9.098,5 to 13.700,2 Mg.ha-1. For the levels of MS was no effect significant (P<0,05) in fertilization with increasing linear fit for fertilization with manure ranging from 21,55 to 23,08% in applications from 0 to 15 Mg.ha-1.Was no effect significant (P<0,05) in fertilization for carbohydrates. The organic fertilization, especially with poultry litter, results in higher productivity when compared to mineral fertilizer, without interfering in the fermentation process and chemical composition of forage sorghum, the conditions in which it was conducted at research presents.