(1) The time and quantity of eggs used: Eggs should focus on supply during the two phases of fur animal production, but at other times, they should not be given.
The first period: starting 2 weeks before mating, eggs should be added gradually. Ten days before mating, every 4 to 6 male fox scorpions will be able to supplement one egg, and the supply of male mink will be halved; 10 mother fox scorpions will be supplemented with 1 egg, and the supply of female mink will be reduced again. half.
Then gradually increase.
During the period of breeding, the male fox scorpion should replenish 1 to 2 eggs a day (depending on the individual size of the animals), and the supply of male mink halve; the female fox scorpion adds half an egg every day, and the supply of female mink Halve again. Note: The
Raw Material of fur animal feed can't change abruptly, and it should be gradually increased or decreased in a week to prevent the feed intake from affecting the animal because of the sudden change of feed.
After the species is completed, the task of the beast is completed and the eggs can be gradually deactivated for a period of 7 days. The female animal has a pregnancy effect (the nutrients in the feed) after being conceived. The absorption and utilization rate will be higher than those of animals under the same conditions without pregnancy, and the use of eggs should also be gradually reduced. During this period, if large quantities of nutrients such as eggs are supplied, large amounts of nutrients will be deposited, which will affect the development of the embryo. For example, the silver fox has a fetus weight of only 1 gram 30 days before pregnancy and only 5 grams by 35 days.
The second period: After 30 days of conception in the fur animals, the amount of eggs should be gradually increased. Because a large number of studies have found that the fur animal's embryos grow rapidly after 30 days and are different from the individuals on the previous day. Therefore, it is necessary to gradually strengthen the supply of nutrients. The initial supply of eggs is halved by the supply of 20 female fox raccoon otters. This increase should be slower. By 40 days of conception, the weight of the silver fox can reach 10 grams, and by 48 days, the body weight can soar to about 65 grams. The amount of eggs added should reach each mother. The fox scorpion has half an egg every day, and every 4 mother otters use 1 egg. The more the supply of eggs and the increase in the amount of eggs should be, the more they should come into production.
Until the 15th day after the birth of the mother animal feed (pay attention to the mother animal using the special animal production of the Institute of Biological Technology in Beijing, the "open material", until the 15 days after the nest, gradually increased from 5 grams per day 150 grams, before breeding animals can also be used), the maximum supply of eggs should reach 1 egg per mother per day. During this period, the amount of milk or goat's milk will also increase. After that, animal protein raw materials (imported fish meal, high-quality meal, etc.) that are cheaper than eggs are gradually replaced.
(2) How to use eggs: It is best not to feed eggs to the fur animals, nor to overcook them. The mature eggs (such as frangipani) are most easily absorbed and have the highest efficiency.
(3) Note: Be sure to gradually increase or reduce the eggs, do not fast, otherwise it is prone to anorexia, antifeedant phenomenon. Because the fur animal's taste is very developed.
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