Analysis of Common Feed for Meat Rabbit

Feed additive refers to some trace components added to feed in order to supplement feed nutrients, improve feed utilization rate, and promote the growth and health of meat rabbits. At present, the main types commonly used in meat rabbit production are as follows:

I. Drug additives

1. Quinolinol  light yellow crystal powder is a broad-spectrum antibacterial growth enhancer and its antibacterial activity is stronger than that of chloramphenicol penicillin and bacitracin zinc. In the meat rabbit body absorption is rapid, excretion is complete, no accumulation, has the role of promoting growth. The amount of commonly used additives is 25030 mg / kg.

two。 Bacitracin zinc  yellowish brown or brown powder can significantly reduce the incidence of enteritis, promote growth and improve feed utilization in meat rabbits. the commonly used amount of additive is 30mg / kg.

3. North rimycin  white or light yellow powder has the functions of preventing disease, promoting growth and improving feed conversion rate of meat rabbits. The commonly used addition amount is 250mg / kg.

It must be pointed out that the use of drug additives, especially antibiotics, should not be used alone for a long time, and the dosage must be strictly controlled to achieve the alternate use of all kinds of antibiotics.

2. Amino acid additives

1. When lysine  is deficient, the growing meat rabbits are very sensitive, which often leads to growth stagnation and nitrogen balance imbalance. In the diet of long-haired rabbits based on grain feed, lysine is one of the most easily deficient essential amino acids. According to the nutritional needs of meat rabbits, the requirement of lysine in the diet is 0.6%-0.8%.

two。 Methionine  is one of the most important sulfur-containing amino acids, which tends to grow poorly and lose weight when it is deficient. Methionine and cystine in the diet are often calculated together, and the total requirement of the two is 0.6%-0.7%.

3. Tryptophan  meat rabbits lack tryptophan often lead to growth stagnation, weight loss, testicular atrophy of male rabbits and decrease of fecundity of female rabbits. According to nutritional requirements, the dietary tryptophan requirement is 0.18%-0.22%.

It must be pointed out that when determining the addition amount of amino acids, we should first determine or consult the nutritional composition table, determine the content of amino acids in the feed, according to the above standards to obtain the difference between the two, and then add, so as to avoid waste.

1. Vitamin A: yellow crystal, easy to oxidize and destroy in light and air. The commonly needed dose is that the diet of growing rabbits should contain vitamin A580 international units per kilogram.

two。 Vitamin E: colorless crystal, easy to oxidize and destroy in light and air. Growing rabbits should contain 50 mg of vitamin E per kilogram of diet.

3. Vitamin D: colorless crystal, not easy to oxidize, but easily destroyed when mixed with calcium carbonate. The diet of growing rabbits should contain vitamin D900 international units per kilogram.

The above vitamins must be added appropriately according to the dietary vitamin content and activity. In the actual production, multivitamin additives are mostly used in the form of vitamin additives, which must be expanded and then added after premixing.

IV. Trace element additives

In the production of meat rabbit, the main trace elements supplemented by trace element additives are iron, copper, zinc, cobalt, manganese, iodine, selenium and so on. When adding to the diet of meat rabbits, first of all, we should find out the nutritional requirements and the surplus and shortage in the formula feed. Secondly, we should grasp the percentage content of certain trace elements in the mineral salts used. Finally, it must be well mixed.

Toxic ingredients in the feed of meat rabbits:

Some commonly used feed for meat rabbits contains some toxic ingredients, which will not cause adverse consequences when the toxic components are lower than the critical level of poisoning, but will endanger the health of meat rabbits and even cause poisoning and death if they are higher than the critical level. Therefore, it is necessary to understand the nature and content of toxic components in feed.

1. Trypsin inhibitor. In biochemical structure, these substances are polypeptides composed of amino acid residues, which are not destroyed in the stomach and combine with trypsin to form a complex after entering the small intestine, which makes trypsin inactive and hinders the digestion of protein. In addition, the complex is not decomposed in the small intestine, but can be degraded by microorganisms after entering the large intestine, or excreted by feces, resulting in the loss of most of the protein in the rabbit body. In the feed commonly used for meat rabbits, the content of trypsin inhibitor in soybean is very high (up to 10.7 μ g / g). If meat rabbits are fed with raw soybean for a long time, compensatory enlargement of pancreas and protein indigestion may occur. High temperature treatment can destroy trypsin inhibitor, such as trypsin inhibitor in hot-pressed soybean cake can be reduced to 3.4 μ g / g, soybean cooking can basically eliminate this substance.

two。 Goiter-causing substance. Under the action of sinapinase in feed or animal, sinaponin can produce substances that prevent thyroid from using iodine ions in blood, hinder thyroxine synthesis, cause goiter and metabolic disorder. Although rapeseed cake is nutritious, its sinapine content is as high as 10-13%, and the effect and economic significance of the current treatment and detoxification method are not ideal, so the practical value of rapeseed cake is not great. In addition, cabbage and cauliflower and other green feed also contains goiter-causing substances, feeding should be appropriate.