Do a good job of seed selection
The rate of lambing is closely related to heredity, and the selection work is very important. One is to choose to leave the first mother to produce twin lambs or the first three wombs to make lambs for breeding purposes, which can retain the characteristics of multiple lambs. Practice has shown that keeping the ewes of the lambs or the four lambs at birth as a species has the highest lambing rate. The ewes of the two lambs were kept and the lambing rate was secondary. A lamb's ewes were kept and the lambing rate was the lowest. Therefore, first, we must choose to retain more lambs and ewes for breeding purposes; second is to select ewes with few skin folds, because wrinkles are negatively correlated with the ewe’s fecundity; third is the selection of ewe’s face; It is the selection of high-bred ram offspring that can increase the lamb's lambing rate.
Do a good job in breeding
Timely breeding. Winter lambs must be properly bred in advance. In September and October, when the ewes have the best lyrics, they are the peaks of estrus. There are many ovulations. The rams have a strong libido, and the semen quality is good, which can increase the lambing rate. So Do a good job of breeding during this period.
Repeated infusion several times. Timely infusion of multiple insemination is one of the ways to promote one child's prolificacy and increase reproduction rate. The spermatozoa live in the ewes' uterus for about 9 hours. If the ewes row 2 or 3 eggs, in order to fertilize the eggs, multiple inseminations can be performed in the middle and late stages of the estrus estrus to increase the conception rate. In production practice, repeated allocation, double allocation and mixed allocation are often used.
Do a good job
Improve the nutritional status of ewes. Nutritional status has a great influence on the fecundity of the ewes, because the weight and fertility of the ewes before their mating are closely related. The ewes can maintain the sensation of more than half a year for normal development. Therefore, it is necessary to strengthen the usual feeding and management of ewes to meet their needs for various nutrients. On this basis, short-term superior feeding should be implemented for the ewes before mating, which not only ensures that the ewes are normal, but also that the number of ovulation increases and the rate of twins is high. Tests have shown that the ewes less than 40 kilograms before mating, estrus and fertility rate of 68.57%, all producing single lamb, with the weight increase double lamb rate also increased rapidly, 40 kg -61 kilograms, the conception rate of 72.9% -100%, The lambing rate is 100%-150%. Therefore, you should do everything possible to do your best before the ewes are assigned.
Improve the nutritional status of rams. The nutritional level of rams has a great influence on the conception rate and lambing rate of ewes. In the sheep mating season, it is necessary to strengthen the breeding of male rams. It is best to feed male rams with full-priced feed, fully guarantee the demand for minerals, vitamins and protein, and increase the exercise. Such rams have high sexual desire and ejaculation. Many more, sperm density, strong vitality. Eggs eweed by ewe are susceptible to fertilization and have a high rate of twins.
Using super-row technology
Injection of pregnant horse serum. Maternal serum has a significant effect on improving the reproductive rate of ewes. 13 days to 14 days after the estrus of the ewes, 8 ml to 10 ml of gestation horse serum is injected subcutaneously on the inside of the hind legs. Injections are performed every other day or every other day. After 3 days to 4 days, estrus can be inseminated. rate.
Use multiple placenta. Active or passive immunization of ewes with gonadal steroids (estrogen, progesterone, and androgen, etc.) can promote follicular development and increase ovulation rates. For example, 1 ml of double lambs per sheep can be used to increase doubling rates of ewes. More than 50% are better for ewes with less improvement.
Low content monomer plant extract, main content 1%-50%. Including but not limited to Pu-erh tea extract 40%, rhodiola rosea extract 1%, 3%, pueraria root extract 30%, 40%, celery extract 5%, salvia miltiorrhiza extract 5%, 10%, burdock seed extract, salicin 5%, aloe vera extract, gynost' pentaphyllum extract 20%, green tea extract, ginseng extract, chlorogenic acid extract.
Plant extraction process
1. Select plants/herbs. No more than ancient prescriptions, prescriptions, folk herbs to find. At present, common and uncommon herbs have been studied. At present, it is mostly to increase the amount of medicinal materials to extract and separate components with low content, or to find medicinal plants that have never been studied from miao medicine, Tibetan medicine, Mongolian medicine, Africa, Latin America and other places.
2. The extraction. Solvent petroleum ether, n-hexane, cyclohexane, benzene, chloroform, ethyl acetate, n-butanol, acetone, ethanol, methanol, water (low polarity → high polarity). Daily medicine decoction effective, water and ethanol and other solvents with large polarity, such as artemisinin boiling ineffective extraction with petroleum ether and other solvents with small polarity. Common medicinal materials water/alcohol/ether to go through, separation and identification of more compounds.
3. The separation. This is the most important work. In the solution extracted from the second step, there are dozens of compounds, usually by column chromatography, which is often referred to as the column flushing. It's a lot of work, it's boring, it's low tech. A master's student might do this every day for two years. The column for separating compounds, as shown below, is as large as 2 meters high and as small as 10 centimeters. Change the solvent condition of mobile phase, change the material of column, different conditions and different separation principles of column repeatedly punching, can be separated from the monomer compound.
Low Content Monomer,Rhodiola Rosea Extract,Kudzu Root Extract,Herbal Extract Apigenin
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