Liaoning Cashmere Goat has the characteristics of strong adaptability, stable genetic performance, high cashmere yield, and good hair quality. Among domestic and foreign white cashmere goats, their cashmere yield, net cashmere rate and cashmere length are all in the leading position. Therefore, in many areas where cashmere goats are being raised, Liaoning Cashmere goats have been introduced to improve local low-yield cashmere goats; therefore, it is of great significance to increase the productivity of Liaoning Cashmere goats. 1 Maintaining the normal age structure of the flock The mother lamb of Liaoning cashmere goat has the ability to excrete normal eggs at the age of about 6 months, and can be bred and progenized at 12 months of age. After that, its breeding ability will increase year by year and reach the peak when it reaches 5-8 years of age. , then decline year by year. Therefore, we should choose to keep good ewes and maintain a considerable number of ewes. The best ewes are kept at 60% to 70%, which plays an important role in increasing the population's lambing and fertility. 2 The genetic advantage of sheep breeding with high fecundity results in a high rate of twin lambs and a high rate of twin lambs in its offspring. Therefore, by taking advantage of this genetic advantage, the reproductive power of offspring can be improved. For specific matching, you can choose superior or excellent selection, or choose a ram with a higher lambing rate and a ewes group with a lower lambing rate to mate. It will increase the lambing rate of this group. The nutritional status of the three species of sheep affects fertility. For mating rams, adequate nutrition can increase sexual desire in the ram, increase physical fitness, increase sperm count and vigor, and meet breeding needs. Low levels of nutrition, poor bred sows affect sexual desire, poor sperm quality, and lower survival rate of offspring. For ewes, short-term superior feeding can stimulate multiple ovulations in ewes and increase ewes' lambing rate. 4 The specific measures for shortening the lamb's lambing interval include maternal early mating, two-year production, and two-year triple production. In actual production, it depends on the specific circumstances to implement. A better approach is to implement the "two-year production system in each year." Breeding ewes with good individuals and good reproductive performance, the first annual production of 2 lambs, the second annual lamb production, the third annual 2 lamb. The year of production of the second lamb should pay special attention to the nutritional status of the ewes and strengthen the management of feeding, otherwise it will cause eczema reproductive disorders and reduce fertility. 5 Light and temperature affect fecundity The Liaoning cashmere goat is a short-day estrus animal. After the autumn equinox starts, the sun starts to whisper quietly. Light affects both the growth of the villi and its fertility. Spring time gradually becomes longer, ewes are inhibited, and there are fewer ewes. The autumn light was gradually shortened, and the ewe exhibited estrus, and the conception rate and lambing rate were significantly higher than those in spring. Rams also had significant seasonal differences. Spring ramsâ€™ libido, sperm motility, and intact sperm rate were significantly lower than those of the same ram in autumn under the same nutritional level. In production practice, the reason why the Qiubao has a higher survival rate and mortality than the Chunyang is related to this. To achieve reproductive potential, understand and use its seasonal reproductive characteristics in order to obtain satisfactory results. Temperatures higher than 37Â°C can cause sperm and eggs to die and shorten their survival time; too low temperatures can result in miscarriage of pregnant ewes and increase in stillbirths. Therefore, the breeding period should try to avoid the periods of high temperature and low temperature. The pregnant ewes should do well in the summer to prevent febrile disease. 6 The main reasons for strengthening feeding management and preventing ewe infertility and miscarriage caused by ewes are genital diseases, endocrine disorders, poor sperm quality of rams, and certain diseases such as brucellosis. The causes of miscarriage include low temperatures, poor environmental conditions, inbreeding, malnutrition, maternity, and certain diseases, drug effects, and feed poisoning. In addition, low breeding levels and poor management are also one of the fields with low fertility. For this reason, it is necessary to strengthen the feeding and management, improve the body quality of the bred sheep, prevent the disease of the sheep, and maintain normal fertility.
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