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1.
Semina ciênc. agrar ; 40(5): 1965-1978, set.-out. 2019. tab, graf
Article in English | VETINDEX | ID: biblio-1501466

ABSTRACT

The aim of this study was to characterize the dehydration curve and, gas exchange of bermudagrass (Cynodon dactylon L.) as well as the nutritional value of hay under different conditions of storage. The dehydration curve was evaluated at 7 time point (0, 13, 18, 22, 37, 42, and 44 hours after cutting) until baling, using five replicates. The time 0 (zero) corresponded to the time before cutting, performed at 19:00 hours. The design was completely randomized with measures repeated over time. Gas exchanges was evaluated 0, 14, and 18 hours after cutting, using 10 replicates. The nutritional value of cowpea hay was evaluated in two open and closed environments (SO and CS), three storage times (30, 60, and 90 days), and five replications. Dehydration of hay was carried out for 44 hours, rapid rates of dehydration was observed in the leaves. Gas exchange was more intense before cutting and up to 14 hours after cutting. Crude protein (CP) content was higher at the time of cutting and decrease after storage. The in vitro dry matter digestibility (IVDMD) and neutral detergent fiber (NDF) content showed no variation between the sampling time and storage systems evaluated. Bermuda grass hay presents rapid dehydration and undergoes changes in the bromatological composition with storage time. Internal temperature of the hay bale did not exceed the ambient temperature.


O objetivo deste estudo foi caracterizar a curva de desidratação, as trocas gasosas do capim bermuda (Cynodon dactylon L.) e o valor nutritivo do feno sob diferentes condições de armazenamento. A curva de desidratação foi avaliada durante 7 horários (0, 13, 18, 22, 37, 42 e 44 horas após o corte) até o enfardamento, com cinco réplicas. O tempo 0 (zero) correspondeu ao tempo antes do corte, realizado à19:00 horas (tempo 0). O delineamento foi inteiramente casualizado com medidas repetidas no tempo. As trocas gasosas foram avaliadas nos tempos 0, 14 e 18 horas após o corte, utilizando 10 repetições. O valor nutricional do feno de do capim- bermuda foi avaliado em dois ambientes, aberto e fechado (SO e CS), três tempos de armazenamento (30, 60 e 90 dias) e cinco repetições. Observou-se que a desidratação do capim Bermuda ocorreu em 44 horas, com taxas rápidas de desidratação nas folhas. As trocas gasosas foram mais intensas antes do corte e até 14 horas após o corte. Os teores de proteína bruta (PB) foram maiores no momento do corte, diminuindo após o armazenamento. Os teores de digestibilidade in vitro da matéria seca (DIVMS) e fibra em detergente neutro (FDN) não apresentaram variação nos períodos e sistemas de armazenamento avaliados. O feno do capim Bermuda apresenta desidratação rápida e sofre alterações na composição bromatológica com tempo de armazenamento. A temperatura interna do fardo não excedeu a temperatura ambiente.


Subject(s)
Nutrition Assessment , Cynodon/growth & development , Cynodon/metabolism , Dehydration
2.
Semina Ci. agr. ; 40(5): 1965-1978, set.-out. 2019. tab, graf
Article in English | VETINDEX | ID: vti-21871

ABSTRACT

The aim of this study was to characterize the dehydration curve and, gas exchange of bermudagrass (Cynodon dactylon L.) as well as the nutritional value of hay under different conditions of storage. The dehydration curve was evaluated at 7 time point (0, 13, 18, 22, 37, 42, and 44 hours after cutting) until baling, using five replicates. The time 0 (zero) corresponded to the time before cutting, performed at 19:00 hours. The design was completely randomized with measures repeated over time. Gas exchanges was evaluated 0, 14, and 18 hours after cutting, using 10 replicates. The nutritional value of cowpea hay was evaluated in two open and closed environments (SO and CS), three storage times (30, 60, and 90 days), and five replications. Dehydration of hay was carried out for 44 hours, rapid rates of dehydration was observed in the leaves. Gas exchange was more intense before cutting and up to 14 hours after cutting. Crude protein (CP) content was higher at the time of cutting and decrease after storage. The in vitro dry matter digestibility (IVDMD) and neutral detergent fiber (NDF) content showed no variation between the sampling time and storage systems evaluated. Bermuda grass hay presents rapid dehydration and undergoes changes in the bromatological composition with storage time. Internal temperature of the hay bale did not exceed the ambient temperature.(AU)


O objetivo deste estudo foi caracterizar a curva de desidratação, as trocas gasosas do capim bermuda (Cynodon dactylon L.) e o valor nutritivo do feno sob diferentes condições de armazenamento. A curva de desidratação foi avaliada durante 7 horários (0, 13, 18, 22, 37, 42 e 44 horas após o corte) até o enfardamento, com cinco réplicas. O tempo 0 (zero) correspondeu ao tempo antes do corte, realizado à19:00 horas (tempo 0). O delineamento foi inteiramente casualizado com medidas repetidas no tempo. As trocas gasosas foram avaliadas nos tempos 0, 14 e 18 horas após o corte, utilizando 10 repetições. O valor nutricional do feno de do capim- bermuda foi avaliado em dois ambientes, aberto e fechado (SO e CS), três tempos de armazenamento (30, 60 e 90 dias) e cinco repetições. Observou-se que a desidratação do capim Bermuda ocorreu em 44 horas, com taxas rápidas de desidratação nas folhas. As trocas gasosas foram mais intensas antes do corte e até 14 horas após o corte. Os teores de proteína bruta (PB) foram maiores no momento do corte, diminuindo após o armazenamento. Os teores de digestibilidade in vitro da matéria seca (DIVMS) e fibra em detergente neutro (FDN) não apresentaram variação nos períodos e sistemas de armazenamento avaliados. O feno do capim Bermuda apresenta desidratação rápida e sofre alterações na composição bromatológica com tempo de armazenamento. A temperatura interna do fardo não excedeu a temperatura ambiente.(AU)


Subject(s)
Cynodon/growth & development , Cynodon/metabolism , Dehydration , Nutrition Assessment
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