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Application of N-carbamylglutamic acid to promoting sexual development of replacement gilts

A technology of carbamoylglutamic acid and gilts, applied in the fields of application, animal feed, animal feed, etc., to achieve the effects of optimizing the structure of pig groups, good promotion and application prospects, and improving breeding efficiency

Inactive Publication Date: 2014-12-10
BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Arginine (Arg) is usually classified as an essential amino acid. Pigs can synthesize Arg, but before sexual maturity, the amount of Arg synthesized cannot meet the growth and development needs of pigs (only 60% to 70%). There must be a sufficient amount of Arg (Jin Chao et al., 2010; Wu Chen et al., 2011)

Method used

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  • Application of N-carbamylglutamic acid to promoting sexual development of replacement gilts
  • Application of N-carbamylglutamic acid to promoting sexual development of replacement gilts
  • Application of N-carbamylglutamic acid to promoting sexual development of replacement gilts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Feeding test of gilt

[0018] Experimental object: 60 gilts with a length of about 60 kg

[0019] Experimental method: Starting from November 2012, 80 gilts of about 60 ㎏ long × large dual gilts were selected and kept in large-scale pig farms in the suburbs of Beijing, divided into 4 groups, fed normally, and carried out the following treatments (Table 1) :

[0020] Table 1 Experimental design of gilts

[0021]

[0022] When the weight of the gilt has increased to about 80 kg, use the test boar to induce love, once every morning and evening. The gilts are bred during the second estrus. The time of the first estrus, the weight of the first estrus, the pregnancy rate and the farrowing situation of the gilts are shown in Table 2.

[0023] Table 2 The effect of adding NCG in the diet on the breeding of gilts

[0024]

[0025] *, the percentage of gilts in first heat before 210 days of age. Lowercase superscripts in peer data indicate significant differences (P <0.05).

[0...

Embodiment 2

[0033] Example 2 Detection of relevant physiological indicators of NCG in promoting sexual development and feeding of gilts

[0034] According to Example 1, the test group and the control group were added with 0.05% NCG. Blood samples were collected at 105d, 120d, 135d, 150d, 165d, 180d, 195d and 210d of gilts, and the serum samples were analyzed for gonadotropin releasing hormone (GnRH). ), Follicle Stimulating Hormone (FSH), Luteinizing Hormone (LH), Estrogen (E), Progesterone (PROG), Growth Hormone (GH) and other major reproductive / growth hormone levels, the results are as follows figure 1 .

[0035] Such as figure 1 As shown, the addition of NCG in the diet of gilts has no significant effect on the levels of GnRH, PROG and LH reproductive hormones in the serum, but has a greater effect on the levels of GH, E and FSH in the blood. Among them, the higher level of GH concentration may be the main reason why the test group and the control group have similar body weights during th...

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Abstract

The invention provides an application of N-carbamylglutamic acid (NCG) to promoting sexual development of replacement gilts. The N-carbamylglutamic acid (NCG) can be added into replacement gilt daily ratio and can promote the sexual development; the initial hybridization time is shortened and the weight at the puberty and the weight of a control group have no remarkable reference; the replacement gilts are hybridized when having oestrus for the second time; and the hybridization pregnancy rate, the litter size, living piglets and newborn average weight of the replacement gilts in an added group and the control group have no remarkable reference. Visibly, the NCG can promote sexual maturity in the breeding of the replacement gilts and the breeding efficiency of the replacement gilts can be improved; a swinery structure of a pig farm is optimized, and feed and time cost for breeding the replacement gilts can be saved and the economic benefits are improved; and the popularization and application prospect is good.

Description

Technical field [0001] The invention relates to the field of animal reproduction and breeding, in particular to the application of N-carbamylglutamic acid (NCG) in promoting the sexual development of gilts. Background technique [0002] In large-scale pig farms, reproductive disorders such as non-estrus, delayed estrus and insignificant estrus are common in gilts, resulting in the culling rate of gilts as high as 30% or more (Stancic et al., 2011). In addition, the annual renewal rate of sows that can propagate in large-scale pig farms is generally maintained at 30% to 70%, which requires a larger group of reserve pigs. It can be seen that the breeding efficiency of gilts determines the structure of the pig farm and is also one of the key factors that determines whether the pig farm can obtain the maximum economic benefits. [0003] The frequent reproductive failures of gilts in large-scale pig farms are mainly caused by delayed sexual development. In recent years, the selection ...

Claims

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Application Information

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IPC IPC(8): A23K1/18A23K1/16A01K67/02
Inventor 冯涛刘彦许晓玲白佳桦张幸彦黄正
Owner BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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