First, antibiotic feed: there are many types of antibiotics, but the practical application of livestock and poultry in the main penicillin, streptomycin, chlortetracycline, oxytetracycline. In the daily livestock and poultry feeding, only two kinds of chlortetracycline and oxytetracycline are used. Feeding piglets, yaks, or chickens with chlortetracycline or oxytetracycline can generally increase weight by 10% to 15%; feeding adult chickens can increase hen health and egg production. Feeding piglets with chlortetracycline and oxytetracycline, with a weight gain of 12% to 40%.
Second, feed yeast: commonly used yeast in livestock breeding, is dry beer yeast. According to the experiment, adding 5% of yeast to livestock and poultry feed can increase the weight by 15% for lactating calves, 20% for finishing pigs, 25% for broiler chickens, and 30% for laying hens. . It can also improve the quality of livestock products and reduce feed consumption. In addition, the use of ultraviolet light to increase the vitamin D2 content of the yeast can be used to feed piglets, calves and lactating cows, which can prevent rickets.
Third, nitrogen-fixing bacteria feed: According to the test, the nitrogen-fixing bacteria inoculated in roughage or mixed feed, placed 25 to 30 degrees Celsius temperature for 4 to 5 days, can make the crude protein content of feed increased by about 15%. Feeding weaned piglets with this nitrogen-fixing diet can increase the weight by about 100 grams per day.
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