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Free-range breeding method capable of promoting development of digestive organ of lamb

A technology for digestive organs and lambs, which is applied in the field of sheep feeding and grazing management, and achieves the effects of simple and easy technology, convenient use, and promotion of digestion and absorption.

Active Publication Date: 2013-12-04
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many studies on compound feed promoting the development of the digestive tract of chicks and piglets. The published related patents include "Compound feed for young poultry that promotes the development of the digestive tract of chicks and its preparation method (application publication number CN10294016A)", "A Compound Feed for Improving the Structure and Function of the Digestive Canal of Piglets (Application Publication No. CN102613405A), but there are few reports on the promotion of the development of the digestive tract of lambs with grazing feeding methods

Method used

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  • Free-range breeding method capable of promoting development of digestive organ of lamb
  • Free-range breeding method capable of promoting development of digestive organ of lamb
  • Free-range breeding method capable of promoting development of digestive organ of lamb

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Effects of grazing plus supplementary feeding on the development of lamb internal organs

[0020] Divide 30 weaned local fat-tailed sheep (average weight 22kg) from 3 to 4 months into 5 groups: house feeding group (G1, no grazing), 2-hour grazing group (G2, 7:00-9:00 grazing), 4-hour grazing group (G3, 7:00-11:00 grazing), 8-hour grazing group (G4, 7:00-15:00 grazing), all-day grazing group (G5, 7:00-17:00 grazing) . The trial period is from June to October. The house-feeding group was reared in captivity, fed with 550g of concentrated feed every day, and had free access to natural pastures and hay. Groups G2, G3, G4, and G5 were supplemented with 450, 300, 250, and 150 g of concentrate in 4 different pens after grazing, and they also ate grass and hay ad libitum in natural pastures. The concentrated feed is fed twice a day, and the hay is cut into 5-10cm long sections with a guillotine before feeding. All lambs were slaughtered after the grazing experime...

Embodiment 2

[0026] Example 2: Effects of grazing plus supplementary feeding on the development of lamb small intestinal villi

[0027] On the basis of Example 1, the small intestine samples of the duodenum, jejunum, and ileum were collected at the slaughtering site to make paraffin sections according to conventional histological analysis methods, stained with HE, observed with an optical microscope, and took pictures to analyze the villus height and crypt depth . The test results show (Table 2):

[0028]The duodenal villi height and villus height / crypt depth in G2 and G3 groups were significantly higher (P0.05); the crypt depth of the ileum in the G5 group tended to be greater than that of the other groups (P=0.085). The small intestine is the main site for digestion and absorption of nutrients, and its function depends on the structure of the small intestinal mucosa (Kagnoff, Mucosal immunology: New frontiers. Immunology Today, 1996, 17(2):57–59.), such as villi and crypts, Mucous memb...

Embodiment 3

[0031] Example 3: Effect of grazing plus supplementary feeding on feed digestibility of lambs

[0032] On the basis of Example 1, the excrement volume and dry matter digestibility (DMD) of lambs in each group were analyzed through digestion tests, and the test results showed (Table 4):

[0033] The excretion of DM in feces was not significantly different among the groups (P>0.05), but the DMD in the house-fed, G2, and G3 groups was significantly higher than that in the G5 group (P=0.021), while there was no significant difference between the house-fed group and the G2, G3 groups. Significant difference (P>0.05), there was no significant difference between G4 and G5 groups (P>0.05). This example proves from the perspective of dietary DM digestibility that grazing for 2-4 hours is more conducive to the digestion and utilization of nutrients than grazing for 8-12 hours. Combining the weight of digestive organs, the development of small intestinal villi and feed digestibility, gr...

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Abstract

The invention provides a free-range breeding method capable of promoting development of digestive organs of lambs. The method is applicable to all one-month-old lambs. The key of the method is time-limited grazing in combination with a proper amount of supplementary feeding. Aiming at young sheep which are bred through barn feeding and half barn feeding in sub-arid continental climate areas in a medium-temperature zone, a breeding method of grazing for 2-4 hours per day in combination with supplementary feeding of 300-450g concentrate feed is adopted, the weight of livers, lungs and abomasums of sheep are enabled to be obviously increased, the development of intestinal villi can be stimulated, the digestion and absorption of nutrient substances by organisms are promoted, the utilization ratio of feeding resources is improved, the breeding cost is reduced and the commodity rate of the lambs is improved. The free-range breeding method capable of promoting the development of the digestive organs of the lambs is simple and feasible, is convenient to use and is not limited by factors such as locations and animal species.

Description

technical field [0001] The invention belongs to the field of animal production in animal husbandry, and in particular relates to a sheep feeding and grazing management method. Background technique [0002] my country's mutton production increased from nearly 2.84 million tons in 2000 to 3.8 million tons in 2011, with an annual growth rate of 3.1%, higher than the world's average growth rate of 2.2%. In 2011, my country’s mutton imports reached 60,000 tons, a year-on-year increase of 5% (China Agricultural Products Commodity Yearbook, Beijing Dongfang Aiger Agricultural Consulting Co., Ltd. Production Statistics of Major Products of Agriculture, Forestry, Animal Husbandry and Fishery. China Agricultural Products Commodity Yearbook. Beijing: China Statistics Publishing House, 2011). In order to meet the demand for mutton in the consumer market, in actual production, lamb fattening is usually fed completely in house feeding to improve production efficiency. A large number of s...

Claims

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Application Information

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IPC IPC(8): A01K67/02A23K1/18A23K1/16A23K1/175
Inventor 张英俊张晓庆罗海玲孙娟娟杨高文
Owner CHINA AGRI UNIV
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