Publicação: Influência do Método de Fenação e Tempo de Armazenamento sobre a Composição Bromatológica e Ocorrência de Fungos no Feno de Alfafa (Medicago sativa, L. cv. Flórida 77)
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2000-05-01
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The objective of this experiment was to study the influence of six haying and four storage periods on the chemical composition and mold growth of alfafa hay. A 6×4 factorial arrangement was used in a completely randomized design, with five replicates for chemical analyses and four replicates for mold determinations. The haying methods were: T1- (shade, S) shade-drying; the forage was carried to a barn immediately after cutting and spreaded (S); T2 and T3: the material was sun-dried until a 50% weight loss and was shade-dried thereafter; T2 was spreaded (sun 50%, S) and T3 was piled up (sun 50%, P). Treatments T4 and T5 consisted of sun-drying and revolving the forage until a 60% weight loss and then completing the drying process under shade, with the material either spreaded (T4, sun 60%, S) or piled up (T5, sun 60%, P). T6 consisted of sun-drying until an 80% loss and then piling up under shade (sun 80%, P). The four storage periods were: 0, 15, 30 and 60 days. It was observed that the hays originating from the longest sun-drying periods showed the worst quality in terms of CP, NDFand ADF. Mold occurrence was highest in the shade-dried hay (T1) and also in the piled-up material, due to lack of ventilation necessary for moisture removal. The most adequate method for alfalfa conservation consisted of sun-drying the forage until a 50% weight loss, followed by shade-drying of the spreaded material.
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Português
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Revista Brasileira de Zootecnia, v. 29, n. 3, p. 669-677, 2000.
