Nutrition quality evaluation method of cow essence supplemented material
A technology of intensive feeding and quality, which is applied in the field of nutritional quality evaluation of intensive feeding for ruminants, can solve the problems that the quality evaluation mode and standard of intensive feeding have not been established, and achieve the effect of easy operation and promotion
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Embodiment 1
[0016] Concentrate supplements produced by ten representative feed companies during the peak lactation period were selected, and each supplement product was uniformly mixed with three roughage standard samples of different quality at a ratio of 1:1. Three different quality roughage standard samples were: alfalfa (high quality group), chinensis (medium quality group) and corn stover (low quality group). Accurately weigh 200 mg of the mixed sample and roughage standard sample respectively as the culture substrate for in vitro culture, and measure the net gas production of the 24-h culture substrate. Estimate the metabolizable energy value of the culture substrate by using in vitro gas production technology combined with nutritional components, and then use the model to convert it into lactation net energy value, determine the lactation net energy value of the concentrated supplementary feed to be tested, and calculate the milk production potential efficiency index of the intensiv...
Embodiment 2
[0018] Concentrate supplements produced by ten representative feed companies during the peak lactation period were selected, and each supplement product was uniformly mixed with mixed roughage standard samples at a ratio of 1:1. The mixed roughage standard sample is composed of alfalfa, chingrass and corn stalks, and its mixing ratio is 20:40:40. The screening basis is based on the principle that the GI value is larger and the cost is the lowest. Accurately weigh 200 mg of the mixed sample and the mixed roughage standard sample respectively as culture substrates for in vitro culture, and measure the net gas production of the 24-h culture substrates. Estimate the metabolic energy value of the culture substrate by using in vitro gas production technology combined with nutritional components, and then use the model to convert it into lactation net energy value, determine the lactation net energy value of the refined supplementary material to be tested, and calculate the milk produ...
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