The Jarrow sheep (original name: Abar Tibetan sheep Jarrow sheep) is an excellent group isolated from Tibetan sheep. In recent years, Jarrow sheep have been cross-breed to improve their performance. Far more than other local breeds, it is an extremely important sheep genetic resource for the high-cold pastoral areas of the Qinghai-Tibet Plateau, which are extremely deficient in fine varieties. The advantages and disadvantages of ram management have a direct impact on the economic benefits of cultivators (fields). Therefore, rams should be properly reared and managed scientifically. 1 Feeding Management of Jarrow Sheep Rams 1.1 The feed requirements should be based on the ram breeding standards in conjunction with the ration, select high-quality pasture grazing. Providing enough protein, minerals, and vitamins according to the environment and mating tasks and ensuring the feed intake of green feed and dry matter requires an appropriate increase in protein content, and the feed quality should be excellent, easy to digest, and good palatability. Ensure that the ram can feed a sufficient amount of feed every day. The main feed concentrates are corn, sorghum, fish meal, soybean meal, wheat bran and so on. Green materials include high-quality grasses and legumes such as ryegrass, sweet sorghum, alfalfa, and clover. Succulent feeds include carrots, beets or silage corn. 1.2 The grazing or feeding management rams are required to grazing or exercise for about 6 hours per day. When grazing, males and females should be separated. Avoid mixing male and female grazing, resulting in early allocation and random allocation. Ensure that there is sufficient clean drinking water, observe the appetite of the ram, observe its health, and adjust the feed in time. The ram house should be lapped, and the house should be spacious, sturdy, ventilated, sunny, clean, dry, and regularly disinfected. 1.3 Non-breeding period feeding and management Non-breeding period should be strengthened with proper increase of captives, and grazing should be carried out when conditions are met. In the non-breeding period, in addition to grazing, the winter daily general supply of concentrate 0.5 kg, hay 3 kg, carrot 0.5 kg, salt 5 ~ 10 g, bone meal 5 g. In the summer, grazing is the main factor, supplementing concentrates properly. Feed 3 to 4 times a day, drinking water l ~ 2 times. 1.4 Breeding period management 1.4.1 Preparation period for breeding (1 to 1.5 months before mating) The amount of concentrated material should be increased, and 60% to 70% of the amount of the mixed species should be given, gradually increasing the amount of concentrate to the breeding period. 1.4.2 The breeding rams are in a state of excitement and are not at peace with feeding. The management of this period should be particularly meticulous, with less feeding and feeding. The feed quality is better, and if necessary, some fishmeal, eggs, goat milk can be added to supplement the large amount of nutrient consumption during the breeding period, but the energy should not be too high. 1.4.3 Rejuvenation period after breeding (1 to 1.5 months after the end of breeding) At this point, generally do not reduce the amount of fine feed, can gradually reduce the movement, increase the grazing time, after half a month to properly reduce the fine material, and gradually transition to non-breeding feeding level, the feed can not be changed too fast. In order to keep the rams energetic and have good semen quality, the following work should be done: The rams should be kept alone, and the sheds should be cleaned every day to keep the sheds clean and dry. It is forbidden to intimidate and kick the rams, and no interference shall be allowed in the course of ejaculation. 2 Utilization of Jarrow Sheep Rams 2.1 Suitable-age breeding rams should begin breeding and use after maturity. Jarrow sheep can reach sexual maturity at 10 months of age, generally reaching the initial age at 18-24 months of age. 2.2 Before training, Jarrow sheep can be trained from 7 to 8 months of age. It is necessary to strengthen the training of the breeder ram to make it easy to approach, docile, and obedient. Before training, you should increase the amount of exercise to improve their physique, so that they contact stable estrus, weight than the ewes, training training can be rammed in the ram's abdomen to make the penis can not reach the ewes vagina, once a day, each After 1 h of training, the first breeding can be artificially assisted in climbing, and should be rested after completion. 2.3 Semen rams are advised to collect 4 times a day, two times in the morning and afternoon, and generally no more than 5 times. When continuously collecting sperm, the first and second should be separated by 5~10 min, and the third and the second time should be separated by more than 30 min, so that the ram has a certain exercise time. Young rams should not collect more than twice a day. Semen collection should be performed after feeding and exercise for 1 h. Each continuous collection of 5 ~ 6 d should rest 1 d. Collect sperm once a week to check for ram sperm. For male rams whose appearance of sperm is abnormal or where the viability and density of sperm is not up to standard, use should be suspended, and the cause should be promptly corrected. 2.4 The breeding intensity of rams per week should not exceed 4 to 6 times, and the number of young sheep and old sheep should be appropriately reduced. The flock should maintain a reasonable ratio of males to females. In the case of natural mating, the ratio of males and females is 1:30, the ratio of artificially assisted males and females is 1:60, and the ratio of male to female artificial insemination is 1:500. 2.5 The use of various kinds of rams should be reasonable and reasonable breeding according to the actual conditions of breeding. Do not cause excessive use or waste. Managers must be meticulous, have certain experience, and report unusual situations to relevant personnel in a timely manner in order to deal with them in a timely manner. The ram and ewes must not be mixed together during the breeding period to avoid random mating, making it difficult to collect sperm. At the time of mating, the rams are rushed into the breeding house to disinfect the foreskin, and then the ewes are placed into the breeding stock and the breeding records are made. 2.6 Compounding once every 8 to 12 hours can increase the conception rate and increase litter size. The compounding can avoid affecting the conception rate due to inaccurate insemination time.
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Feeding Management and Utilization of Jarrow Sheep Rams
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