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Method for improving reproductive performance of sheep

A reproductive performance and sheep technology, applied in the field of animal husbandry, can solve problems that restrict the reproductive performance of livestock, achieve the effects of improving the intrauterine environment, increasing NO concentration, and improving reproductive performance

Pending Publication Date: 2020-09-25
NORTHWEST UNIVERSITY FOR NATIONALITIES
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AI Technical Summary

Problems solved by technology

Prenatal loss of embryos is a major problem in mammalian reproduction. About 20%-40% of sheep and most mammalian embryos die, and two-thirds of them occur during implantation. Currently, there is no effective way to reduce early Loss of gestational embryos severely restricts livestock reproductive performance

Method used

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  • Method for improving reproductive performance of sheep
  • Method for improving reproductive performance of sheep
  • Method for improving reproductive performance of sheep

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Embodiment Construction

[0021] The technical solutions of the present invention will be further described in detail below in conjunction with the embodiments.

[0022] A method for improving reproductive performance of sheep, comprising the following operations and content: design the feed formula for pregnant sheep as shown in Table 1, formulate the feed as the basic diet according to the ratio of roughage and concentrate in the formula, and use NCG according to 0.05% of the weight of the diet Add %-2% to the concentrate, feed twice in the morning and evening, the day of sheep breeding is 0 day, start feeding the above-mentioned NCG-added feed on day 0, until the end of 40 days, and start feeding the formulated feed on 41 days of gestation The NCG-free basal diet until farrowing will increase the number of lambs in the ewe litter by 7-32%, the number of live lambs in the litter by 12-35%, and the litter weight of live lambs will increase by 2.6-5.5%.

[0023] As a preference, NCG is added to the con...

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Abstract

The invention discloses a method for improving the reproductive performance of sheep. The method includes the following steps that mating is carried out by using insemination methods such as natural mating, vaginal artificial insemination, cervix artificial insemination and laparoscopic uterine horn insemination, the day of mating is counted as the zeroth pregnancy day, and a feed containing 0.05%-2% dietary N-carbamylglutamic acid is started to feed from the 0-40th day of pregnancy. The action principle of NCG is fully used, the total number of lambs per nest of ewe is increased by adding NCGin the early pregnancy to increasing the NO concentration and iNOS enzyme activity in the systemic circulation of the ewe, reducing the plasma ammonia concentration and reducing embryonic death, andthe number of live lambs of nest breeding is increased by improving the intrauterine environment so as to improve the reproductive performance of the ewe. The N-carbamoylglutamic acid added in the method is an amino acid derivative, is a safe and reliable feed additive and has no toxic and side effects, the addition method is simple, and the effect of improving the reproductive performance of sheep is obvious.

Description

technical field [0001] The invention belongs to the technical field of animal husbandry and relates to a method for improving the reproductive performance of sheep. Background technique [0002] The lambing size of sheep (Ovis aries) is a key factor affecting the development of the sheep industry, and the increase in the lambing size is of great significance for increasing the economic benefits of sheep farming. Prenatal loss of embryos is a major problem in mammalian reproduction. About 20%-40% of sheep and most mammalian embryos die, and two-thirds of them occur during implantation. Currently, there is no effective way to reduce early The loss of gestational embryos severely restricts the reproductive performance of livestock. Maternal nutrition is a major factor affecting the intrauterine environment and plays an important role in regulating fetal survival, growth and development. Both nutritional balance and nutritional quality may affect embryonic development. Studie...

Claims

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Application Information

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IPC IPC(8): A01K67/02A23K50/10A23K20/142
CPCA01K67/02A23K20/142A23K50/10
Inventor 蔡元臧荣鑫杨具田李春阳杨妍梅邹文辉戴洪伟刘伟李兴龙
Owner NORTHWEST UNIVERSITY FOR NATIONALITIES
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