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CaracterizaĆ§Ć£o das silagens de erva da ilha Terceira
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Abstract(s)
Tem por objetivo este trabalho caracterizar as silagens de erva da ilha Terceira.
Foram avaliadas 50 amostras de silagens de erva de diferentes exploraƧƵes agrĆcolas da ilha Terceira de forma a poder obter uma representaĆ§Ć£o geral de todo o universo em estudo.
As amostras foram colhidas no ano de 2012, e foram posteriormente analisadas no LaboratĆ³rio de NutriĆ§Ć£o Animal da Universidade dos AƧores para se proceder Ć caracterizaĆ§Ć£o do seu valor nutritivo. Esta caracterizaĆ§Ć£o baseou-se em anĆ”lises Ć concentraĆ§Ć£o dos diversos componentes orgĆ¢nicos: o teor em matĆ©ria seca (MS), o teor de proteĆna bruta (PB), o teor de fibra em detergente neutro (NDF), o teor de fibra em detergente Ć”cido (ADF), o teor de lenhina em detergente Ć”cido (ADL), o azoto amoniacal (N-NH3), o teor de cinzas e o pH da silagem.
Da totalidade da amostra apenas 32% apresentava valores ideais para a composiĆ§Ć£o em MS. Quanto ao teor de PB os resultados obtidos foram um pouco baixos para a qualidade da forragem aƧoriana, havendo um maior nĆŗmero de amostras compreendidas entre 10 e 12% de PB, cerca de 36% das amostras. Quanto aos resultados do teor N ā NH3, sĆ£o considerados satisfatĆ³rios, cerca de 40% das amostras estĆ£o no intervalo pretendido. Quanto ao pH da amostra 70% estava compreendido no intervalo ideal de conservaĆ§Ć£o. Da amostra em estudo 62% apresentava valores superiores ao ideal no que respeita Ć concentraĆ§Ć£o de NDF. Valores de ADL e ADF tambĆ©m se apresentavam elevados.
As incongruĆŖncias entre as diferentes amostras e a inexistĆŖncia de um padrĆ£o na composiĆ§Ć£o em componentes orgĆ¢nicos demonstra desconhecimento e falta de informaĆ§Ć£o relativamente a boas prĆ”ticas para a elaboraĆ§Ć£o de silagens de erva.
ABSTRACT: This work aims to characterize the grass silages of Terceira. Were evaluated 50 samples for grass silage from different farms in Terceira so as to obtain a general representation on the entire universe under study. The samples were collected in 2012, and were subsequently analyzed in the Laboratory of Animal Nutrition, University of the Azores to proceed to the characterization of nutritional value. This characterization was based on analysis of the concentration of various organic components: the content of dry matter (DM) content of crude protein (CP) content of neutral detergent fiber (NDF), the content of acid detergent fiber (ADF), the content of acid detergent lignin (ADL), the ammoniacal nitrogen (NH3-N), the ash content and the pH of silage. Of the total sample, only 32% had optimal values for the composition in MS. As to the content of the PB results were slightly lower for the quality of the Azores material, having a larger number of samples between 10 and 12% PB, about 36% of the samples. As to the results of the content NH3 - N, are considered satisfactory, about 40% of the samples are in the desired range. As the pH of the sample was 70% understood the optimal range of conservation. The sample under study had 62% higher than ideal as regards the concentration of NDF values. ADF and ADL values also had high. The inconsistencies between the different samples and the lack of a standard in the composition of organic compounds demonstrate lack of information on good practices for the development of grass silages.
ABSTRACT: This work aims to characterize the grass silages of Terceira. Were evaluated 50 samples for grass silage from different farms in Terceira so as to obtain a general representation on the entire universe under study. The samples were collected in 2012, and were subsequently analyzed in the Laboratory of Animal Nutrition, University of the Azores to proceed to the characterization of nutritional value. This characterization was based on analysis of the concentration of various organic components: the content of dry matter (DM) content of crude protein (CP) content of neutral detergent fiber (NDF), the content of acid detergent fiber (ADF), the content of acid detergent lignin (ADL), the ammoniacal nitrogen (NH3-N), the ash content and the pH of silage. Of the total sample, only 32% had optimal values for the composition in MS. As to the content of the PB results were slightly lower for the quality of the Azores material, having a larger number of samples between 10 and 12% PB, about 36% of the samples. As to the results of the content NH3 - N, are considered satisfactory, about 40% of the samples are in the desired range. As the pH of the sample was 70% understood the optimal range of conservation. The sample under study had 62% higher than ideal as regards the concentration of NDF values. ADF and ADL values also had high. The inconsistencies between the different samples and the lack of a standard in the composition of organic compounds demonstrate lack of information on good practices for the development of grass silages.
Description
DissertaĆ§Ć£o de Mestrado, Engenharia ZootĆ©cnica (Zootecnia), 27 de abril de 2015, Universidade dos AƧores.
Keywords
NutriĆ§Ć£o Animal ProduĆ§Ć£o Animal Silagem de Erva Ilha Terceira (AƧores)
Citation
Rego, Isac Estrela. "CaracterizaĆ§Ć£o das silagens de erva da ilha Terceira". 2015. 71 p.. (DissertaĆ§Ć£o de Mestrado em Engenharia ZootĆ©cnica). Angra do HeroĆsmo: Universidade dos AƧores, 2014.