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Cow heat-stress resistant feed additive

A feed additive and heat stress technology, applied in animal feed, animal feed, application, etc., can solve the problems of poor appetite of dairy cows, harmful stimulation of the body, etc., to improve feed utilization and production performance, reduce the number of somatic cells, No Pollution Cost Effect

Active Publication Date: 2014-04-23
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the glycerol used in the breeding industry is mainly derived from the by-products of the biodiesel process or industrial synthesis. During the processing, some harmful substances such as heavy metals or methanol will be introduced, which will adversely affect the appetite of dairy cows or cause harmful stimulation to the body.

Method used

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Examples

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Effect test

Embodiment 1

[0033] Example 1 Nanjing dairy farm

[0034] 1. Production of feed additives against heat stress in dairy cows

[0035] 1) Strains:

[0036] Saccharomyces cerevisiae (Sc) NAU‐ZH‐GY1, provided by our laboratory, has been preserved in the General Microbiology Center of China Committee for the Collection of Microbial Cultures, and the culture preservation number is CGMCC No.4551.

[0037] 2) Medium:

[0038] Slope activated medium (YPD): glucose 20g, yeast extract 10g, peptone 20g, agar 20g, water 1L, natural pH, 115°C, high-pressure steam sterilization for 15min, spare;

[0039]Seed culture medium: glucose 28g, yeast extract 14g, peptone 28g, water 1.4L, natural pH, 115°C, high-pressure steam sterilization for 15min, spare;

[0040] Production medium ingredients: glucose 42kg, peptone 280g, urea 420g, corn steep liquor powder 1.4kg, sodium chloride 5.6kg, MgSO 4 ·7H 2 O70g, calcium chloride 14g, thiamine 70g (added separately).

[0041] 3) Activation of strains and acquisi...

Embodiment 2

[0107] Embodiment 2 A dairy farm in Shanghai

[0108] 1. Production of feed additives against heat stress in dairy cows

[0109] 5) Strains:

[0110] Saccharomyces cerevisiae (Sc) NAU‐ZH‐GY1, provided by our laboratory, has been preserved in the General Microbiology Center of China Committee for the Collection of Microbial Cultures, and the culture preservation number is CGMCC No.4551.

[0111] 6) Medium:

[0112] Slope activated medium (YPD): glucose 20g, yeast extract 10g, peptone 20g, agar 20g, water 1L, natural pH, 115°C, high-pressure steam sterilization for 15min, spare;

[0113] Seed medium: glucose 75g, yeast extract 30g, peptone 60g, water 3L, natural pH, 115°C, high-pressure steam sterilization for 15min, spare;

[0114] Production medium ingredients: glucose 49kg, peptone 420g, urea 560g, corn steep liquor powder 1.7kg, sodium chloride 5.6kg, MgSO 4 ·7H 2 O98g, calcium chloride 14g, thiamine 98g (added separately).

[0115] 7) Activation of strains and acquisi...

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Abstract

The invention discloses a cow heat-stress resistant feed additive. Saccharomyces cerevisiae (Sc) NAU-ZH-GY1 is applicable to prepare the cow heat-stress-resistant feed additive. The cow heat-stress-resistant feed additive, which is rich in glycerin, yeast live bacteria and microbial metabolites such as amino acids, vitamins and the like, is produced under the high-permeability condition by employing a continuously feeding manner for fermentation; and the cow heat-stress resistant feed additive is capable of cooperatively perform dual efficacy of glycerin and yeast, and is capable of substantially improving lactation yield, 4% fat corrected milk yield and milk fat percentage of cow under heat-stress condition, improving blood sugar concentration, reducing somatic cell number, concentration of non-esterified fatty acid and concentration of urea nitrogen in milk, supplementing energy for cows, alleviating body weight reduction, enhancing antioxidation capability, reducing HSP70mRNA level and effectively alleviating heat stress of cows.

Description

technical field [0001] The invention relates to a feed additive for resisting heat stress of dairy cows, belonging to the field of feed additive applications. technical background [0002] The dairy cows raised in my country are mainly Holstein cows from Northern Europe, which have been domesticated and selected for a long time to form Chinese Holstein cows. The Netherlands has a mild climate, with an annual temperature between 2 and 17°C. This climate makes Holstein cows cold-resistant, but their heat resistance is poor; in addition, Holstein cows are larger in size and have a small heat dissipation area per unit of weight. It has good thermal insulation performance with body tissues, underdeveloped sweat gland function, and less heat dissipation by evaporation from the skin. In addition, dairy cows have a large feed intake, and the roughage is fermented in the rumen, which produces a large amount of metabolic heat, and the milk production is high, and the metabolism is st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23K1/18A23K1/16C12N1/18C12R1/865
Inventor 黄克和刘瑾叶耿坪陈兴祥刘永杰刘云欢甘芳
Owner NANJING AGRICULTURAL UNIVERSITY
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