Data/hora: 12/06/2024 02:22:26

Provedor de dados: | 18
País: | United Kingdom
Título: | Diurnal shifts in nutritive value of alfalfa harvested as hay and evaluated by animal intake and digestion
Autores: | Burns, J.C.; Fisher, D.S.; Mayland, H.F.
Data: | 2007
Ano: | 2007
Palavras-chave: | Animal; Time-of-day harvest difference; Mass Import - autoclassified (may be erroneous).
Resumo: | Forages accumulate nonstructural carbohydrates  during the day, with animals showing  preference and improved daily responses from  afternoon compared with morning cut hays. This  study evaluated alfalfa (Medicago sativa L.) hay  harvested at 0700, 1000, 1300, 1600, and 1900  h to determine how nutritive value changes during  the day and to assess the impact of these  changes on animal preference using cattle (Bos  taurus L.), sheep (Ovis aries L.), and goat (Capra  hircus L.) responses. Total nonstructural carbohydrates  were altered by time of cut (cubic contrast,  P &lt; 0.01) ranging from 85 g kg?1 at 0700 h  to 83 g kg?1 at 1000 h, then increasing to 97 g  kg?1 by 1600 h with little change at 1900 h (96 g  kg?1). Fiber fractions also varied diurnally, with a  quadratic decrease from 418 g kg?1 at 0700 h to  387 g kg?1 by 1900 h in neutral detergent fiber. A  combined analysis of three animal trials showed  a linear increase in dry matter intake (DMI) with  later hay harvest, a cubic response for dry matter  digestion (DMD), and a linear increase in  digestible DMI. Mean DMI increased from 27.5  g kg?1 body weight at 0700 h to a maximum  of 30.8 g kg?1 body weight at 1600 h, whereas  DMD decreased from 658 g kg?1 at 0700 to 647  g kg?1 at 1300 h and peaked at 664 g kg?1 at  1600 h. Digestible DMI increased from 18.1 g  kg?1 body weight at 0700 h to a maximum of  20.5 g kg?1 body weight at 1600 h. No additional  advantages in animal responses were noted by  cutting after 1600 h.
Tipo: | Article
Idioma: | Inglês

Identificador:

http://eprints.nwisrl.ars.usda.gov/69/1/1234.pdf

Burns, J.C. and Fisher, D.S. and Mayland, H.F.  (2007) Diurnal shifts in nutritive value of alfalfa harvested as hay and evaluated by animal intake and digestion.   Crop Science.     47:2190-2197.

Relação:

http://eprints.nwisrl.ars.usda.gov/69/

1234

Formato: | application/pdf