Qualitative parameters and nutritional potential of arboreal cotton silage
The objective of this work was to evaluate the qualitative parameters and nutritional potential of silage of arboreal cotton (Gossypium hirsutum) shoots. The experiment was carried out in a 4×2 factorial arrangement, for two silage forms (in natura or pre-dried), with four treatments, as follows: wi...
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Veröffentlicht in: | Pesquisa agropecuaria brasileira 2020-01, Vol.55 |
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Zusammenfassung: | The objective of this work was to evaluate the qualitative parameters and nutritional potential of silage of arboreal cotton (Gossypium hirsutum) shoots. The experiment was carried out in a 4×2 factorial arrangement, for two silage forms (in natura or pre-dried), with four treatments, as follows: without additives (WA); with inoculant (WI); with 2% ground corn (GC); and with 2% ground corn with inoculant (GC+I). The fermentative quality and nutritional parameters of the silages were evaluated. Fermentative quality was better in the WI and GC+I silages. The dry matter content was higher in the pre-dried silage, while the crude protein contents of in natura silage were higher in the WA and WI treatments. The lowest values of neutral detergent fiber and acid-digested lignin were observed in the WI treatment, for pre-dried silage. Total digestible nutrients and total volume of gas were higher in the pre-dried silage, in the WI and GC treatments, respectively. In vitro dry matter digestibility was lower in WA silage, in both forms. Silage of arboreal cotton associated with inoculant or with inoculant with ground corn shows a better fermentation profile and improves the energy and nutritional values, both in natura and pre-dried forms; however, in natura silage is less laborious for rural producers.
Resumo: O objetivo deste trabalho foi avaliar os parâmetros qualitativos e o potencial nutricional da silagem da parte aérea do algodão (Gossypium hirsutum) arbóreo. O experimento foi realizado em arranjo fatorial 4×2, para duas formas de silagem (in natura ou pré-seca), com quatro tratamentos, conforme a seguir: sem aditivos (SA); com inoculante (CI); com 2% de milho moído (MM); e com 2% de milho moído e inoculante (MM+I). Foram avaliados a qualidade fermentativa e os parâmetros nutricionais das silagens. A qualidade fermentativa foi melhor nas silagens CI e MM+I. Os teores de matéria seca foram maiores na silagem pré-seca, enquanto a proteína bruta na silagem in natura foi maior nos tratamentos SA e CI. Os menores valores de fibra em detergente neutro e lignina digerida em ácido foram observados no tratamento CI, para a silagem pré-seca. Os nutrientes digestíveis totais e o volume total de gás foram maiores na silagem pré-seca, nos tratamentos CI e MM, respectivamente. A digestibilidade in vitro da matéria seca foi menor na silagem SA, nas duas formas. A silagem de algodão arbóreo associada ao inoculante ou ao inoculante com milho moído apresenta o melhor perfil fe |
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ISSN: | 0100-204X 1678-3921 1678-3921 |
DOI: | 10.1590/s1678-3921.pab2020.v55.01655 |