Second, grasping the age of first match and the age of sows should not be too early to start with, early matching not only affects the sow's own development, but also the number of litters, the piglets produced are also poor. In general, sows of local breeds start to breed when they are 6 to 7 months old and have a body weight of more than 60 kilograms; domestic cultivars and hybrid sows can be bred at ages of 8 to 9 months and weights of 90 to 100 kilograms; Introduce (foreign) varieties to 8 to 10 months of age, when the body weight is 100 to 120 kg when the breeding. Sows are generally eliminated 5 to 7 years after use.
Third, a reasonable arrangement of breeding season In order to improve the survival rate of piglets, so that piglets can grow healthily, must be reasonable arrangements for mating seasons. First-mother sows should be arranged for breeding from April to May, and from 8 to 9 months of littering; 9 to 1.0 months of breeding; 1 to 2 months of litter at the second year; 2 to 3 months of breeding; 6 to 7 months of litter. This arrangement allows most of the sows to breed litter in spring and autumn with a high survival rate.
Fourth, the control of lyric breeding sows can not be too fat or too thin, before the mating is generally controlled in 70% Bacheng is good, so that the fertility rate of mating is high, litter size is also more.
Fifth, short-term excellent sows in the pre-match 1.0 to 14 days, increase the amount of dietary sows in the sow, generally increased by 30% to 50%, can stimulate multiple ovulation sows, and thus more prolific. However, it should be promptly reduced to normal feeding after mating. At the same time, sows are also fed foods rich in vitamin A.
Six, timely breeding when the estrus pus pus red swelling has just begun to subside, hand pressure sows on the back do not move, ears straight when the most appropriate breeding. Local sows can be bred on the 2nd to 3rd days of estrus; introduction (foreign) breeds and cultivars can be bred on the afternoon of the day of estrus or on the morning of the 2nd day; according to the sow’s age, “older and younger†should be followed. In the evening, the principle of not being old or not with middle.
7. Pay attention to the selection of male and female sows to be excellent boars with excellent sows, and excellent boars with normal sows, so that the number of litters can be increased and the quality of herds can be improved. In terms of age, old boars are usually used with young sows, young boars with old sows, and boars with strong boars are effective.
8. The proportion of male and female pigs should be suitable for a 21-day breeding cycle. One adult boar that is older than 1 year old can only have 10 sows, and boars that are 8-12 months old can only have 4-6 boars. If more than this limit is exceeded, the number of sows born will be reduced. If we are grouped for weaning, only four boars per adult boar and only two boars for young boars; when using individual matings, boars cannot exceed two boars per day. With artificial insemination, each boar can be assigned 10 to 20 sows per day.
Nine, pay attention to breeding techniques In order to improve the conception rate and litter size of sows, repeated breeding and double breeding can be used. Repeated mating involves mating the same boar with the same sow two times in one estrus period of the sow. Usually 20 to 30 hours after the beginning of oestrus, when the sow's back is still standing on the back of the hand, the first time of mating, with 12 to 20 hours and 1 time. Double mating means that in the estrus of a sow, two boars of different species or two boars of the same species with different consanguinity should be mated once every 10 to 15 minutes. Double mating litter size can be increased by 20% to 40% compared to single breeding. In order to ensure the conception rate, mating time is best arranged before the morning and evening feeding.
Ten, increase ovulation sows in the estrus intramuscular 500 ~ 1500 international units of pregnant hormones to promote sex hormones, can increase the number of ovulation, increase the conception rate, increase the number of litters.
Eleven, timely delivery of progesterone sows after the timely feeding of compound norethindrone sugar-coated tablets, can increase the number of litter size 2 to 3. The method is: starting from the 5th day of breeding, the medicine is started, 4 at a time, once a day, and when feeding 30 tablets, the medicine is stopped. The time of feeding is best arranged when the sow is fasting before the early feeding and fed with a small amount of concentrate.
Twelve, to strengthen the feeding and management of pregnant sows sow pregnant women to feed protein, vitamin-rich feed, with green feed, try to diversify the feed to meet the nutritional needs of sows. Do a good job of management. Prevent a sow from falling, fighting, squeezing, scaring and other strenuous exercise to cause miscarriage. After 2 months of pregnancy, it is necessary to raise in a single lap, exercise and sun, and enhance the sow's constitution in order to prevent excessive fat; after 3 months of pregnancy, the amount of concentrate should be appropriately increased to reduce the crude forage: and to supplement calcium; Days to reduce the fine material. In order to avoid miscarriage and stillbirth, pregnant sows should not be fed mildewed feed, overly acidic silage, powdered slag, and distillers grains containing more alcohol.
XIII. Early weaned suckling piglets are most suitable for weaning at 3 to 4 weeks postpartum, so that sows can be rehabilitated early and catch estrus before breeding to increase the number of litters per year and the number of litters.
XIV. Sow the sow during the day to make it easier for the sow to give birth during the day in order to facilitate the production and management and reduce the death of the piglet. The method of promoting daytime sow birth is: 1 to 2 ml of cloprostenol injection is given intramuscularly to each sow at 1 to 2 days before pregnancy (112 days of pregnancy) at 8 to 9 am Promote sows to give birth during the day.
Author: Heilongjiang Province Border Trade Bureau Practical Technology Promotion Station
tattoo kit : Every future professional tattoo artist has to start somewhere, and many choose to purchase Tattoo Kits
to help learn the craft. You probably aren't going to get an apprenticeship until you have messed around a bit on your
own. Tattoo kits provide you with an opportunity to do just that - ply your trade on fruit, leather and very generous
friends. Before you lay out hard-earned cash for such a kit, acquaint yourself with the basics.
What Are Tattoo Kits?
If you're serious about learning how to create your own tattoos or
considering opening your own shop some day,
sooner or later you're going to find yourself looking at tattoo kits. Tattoo kits are packaged collections of the
typical tools of the tattoo trade that are available for sale in most states to anyone at least 18 years old.
What Is Included a Kit?
There are hundreds of tattoo kits on the market. Each
manufacturer has its own idea of what should go into a particular level
kit, so one company's professional tattoo kit may be the equivalent of
another company's intermediate set. Do your research before purchasing.
Beginner Kits
In the typical beginner's tattoo kit expect to find:
One Tattoo Machine, although the quality of the unit varies with kit pricing
Variable power supply unit to operate the tattoo machine (Make sure a foot operation switch and clip cord are included.)
A set of inks and caps
Disposable tubing
Sterile Tattoo Needles
Antiseptic wash (brands vary, but Green Soap is popular)
Flash art
How-to booklet
Practice "skin"
Company catalog for ordering further supplies
Intermediate Kits
An intermediate tattoo kit will usually contain the typical items found in a beginner's kit with a few variations:
Two tattoo machines, one for lining and one for shading
A larger supply of needles and tubing
A larger selection of inks
Caps plus a holder
Stencil paper for transferring tattoo designs to skin
Antiseptic supplies, plus various bandages, gauze, gloves, etc.
Aftercare kit
Professional Kits
Professional tattoo kits will contain many of the same
items found in the intermediate kits, but will usually come
with a larger supply of everything.The biggest difference you will see with the professional kits is the inclusion of an
autoclave with sterilization pouches and an ultrasonic unit. Both of these items are indispensable for sterilizing all
reusable tattoo machinery and supplies between customers.
Tattoo Kits
Tattoo Gun Kits, Cheap Tattoo Kits, Tattoo Machine Kits, Temporary Tattoo Kit, Starter Tattoo Kit, Tattoo Ink Kits
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