Effect of piglets and milk agents on fat digestion and absorption – Pig Disease Forum – China Animal Husbandry Website – A useful animal husbandry website
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Early (3 ~ 4 weeks old) or even early (3 weeks Before the age, weaning is already universal in the modern aquaculture industry. The volume and weight of the 3-4-week-old piglets and the volume and weight of the digestible gland have not reached the maturity level, and the fine structure of the digestive tract is not fully developed. The type of feed structure in the weaning has also changed dramatically, and the digestion can decrease by about 22.18mg of breast milk to 13.8 to 14.5mJ of weaning day (calculated by dry matter per kilogram), and the diet is changed by extremely easy to digest. Antigen, more anti-nutrient factor, and extremely difficult to digest the absorbed corn – soybean diet type. Weaned stains will cause the piglet of small intestinal velvet hair shortage (on day 5, it is reduced to 50% of the height of the original hair), the volume of digestive road is small, the appetite is decreased, resulting in reduced food production, and the digestibility of nutrients is reduced. At this time, we must effectively relieve the hair stress, maintain and promote normal growth and development of piglets, and the diet must take high energy and high nutrient concentration. Therefore, nutritional formula adds fat to feed diet, and makes high energy balance diet to solve the problem of insufficient energy. However, the effect of adding fat in the dietary piggy day is very inconsistent. This paper summarizes and provides effective improvement measures for the impact of the porcine milk, and provides an effective improvement measures to provide scientific basis for the reasonable use of fat for the aquaculture industry.
1, the effect of piglets on fat digestion of fat digestion
21-year-old smash pig with fat capacity is limited, especially after weaning. TOKACH, etc. Test research, adding fat in high nutritional concentrations. The experiment was 384, 21 day-old shackles. Feeding 0%, 3%, 6%, 9% of grease in the first stage, respectively. The results show that there is no significant effect on the average daily daily weight of the 0-2 week old pigs in the day grain. According to Shi Xudong, for 35D weaning piglets, 28 days of age began to add 3% lard’s dietBy the age of 49, the average daily gain increased by 8.39%. Therefore, the smaller the pigs of piglets, the smaller the effects of fat use, which may be related to the difference in digestive trauma of different weaning of piglets and digestive tract.
Many tests show that although adding fat in the sun-weaned milk, although it is not possible to increase the weight of 0-2 weeks old pigs after weaning, it can improve the daily gain of 3-4 weeks after weaning, and the feed efficiency is also significant. Improve (Dove, etc.). This indicates that the effective utilization capacity of piglets on fat increases with the increase in age. Howard tried to add soybean oil to the growth performance of 0 and 2 weeks old pig days after weaning, and the results showed that the effect of adding fat and immediately adding fat immediately after weaning for 2 weeks. At present, the use of fat in the weaning piggy day can obtain most scholars. The conclusion of most scholars is that the use of fat in the pigs in 1 to 2 weeks is poor, and the use of 2 weeks has gradually improved with the increase of age.
Table 1. Different types of fat on different aged pigs after weaning
Author weaned milk day-old fat type and added amount of effect data source 1-2 weeks 3-4 weeks 1-4 week K RCERA and other 21 cow 8% – + – J-Anim.sci.67: 2048-2059 Li Defa, etc. 21%, 5% in the late period; 10% in the early stage of coconut oil, 5% in the late stage; 10% in the previous period, later period 5% – ++ J-Anim.SCI.68: 3694-3764D Bjones et al. 10%, 5% in the late period; 10% in the early stage, 5% in the late stage – J-Anim.SCI70: 3473-3482C RDOVE Wait 26 feed grade animal fat, 2.5%, 5.0% ++ J-ANIM.SCI70: 805-810 Chen Kaihui and other 25 palm oil, butter, soybean oil each 4%
+ Journal of Jiangxi Agricultural University, 19 (4): 25-28 Shizhao Mountain, 38 soybean oil 38 — Shandong Animal Husbandry, 3: 12-14S S Brown21 Animal fat 5% — J-Anim.SCI.81: 168 Shi Xudong 28 lard 3% +
China Animal Husbandry Impurity, 33 (3): 46 Note: “+” in the table indicates an effect, “-” indicates no effect.
2, add bile acid to weaningImprovement of piglet fatty disintegration
After the dietary fat enters the duodenus and a large amount of pancreatic juice and bile and the small intestinal fluid, the bile plays an important emulsified fat under the peristalsis of the intestines. The fat particles becomes more uniform, increase the contact area of fat and pancreatass in the contact area of the lipid water to more fully decompose fat. The triglyceride of the short chain fatty acid, small molecular weight, easy to disperse, and can be hydrolyzed by enzymatic hydrolysis, mainly absorbed by intestinal mucosa capillary in the form of fatty acids and glycerol, and directly into the liver through the portal veins. The long chain fatty acid and its triglycerides must be re-synthesized to triglycerides in the intestinal mucosa cells under the common action of phospholipid, bile acid, and apolipoprotein, and forming a chyloma, which can be released into the tissue fluid, and enter the crate, The blood circulation is re-entered by lymphatic tubes and is assigned to each tissue. Caranina et al. Believes that early weaned piglet bile secretion affects the emulsification of fat, which affects the digestion and absorption of fat. Bile acid is the main active ingredient of bile. As a bile acid as a dumer, participate in fat emulsification, digestion, absorb three key steps, ie emulsified fat, activates lipase, and form a mixed micro group with fatty acids, and the fatty acid is absorbed. In 2017, the Bile Acid Evaluation Report was reported in 2017: 28 days-aged shaded piglets added 80 ~ 100 mg / kg bile acid (95% content) treatment group of crude fat table concept digestion rate significantly increased (P
Table 2, adding bile acids on the Impact of Idental Digestibility of Weaned Pig Nutrients (%, Dry Subject Basics)
Project Bile Acid (Mg / Kg) SEM < 0.05），并且粗脂肪表观消化率与胆汁酸添加量存在显著的二次关系（P < 0.05）。添加80~100 mg/kg胆汁酸极显著提高了干物质表观消化率（P < 0.05），显著提高了总能表观消化率（P < 0.05）。添加100mg/kg胆汁酸粗脂肪消化率与对照组相比提高了26.14%，效果极为显著（P < 0.01）.
value 06080100 Treatment of linear secondary dry matter 82.74C83.94BC85.081Ab85.44A0.43 P > 0.05). <0.010.99 0.33 粗蛋白83.0083.0683.3683.561.09 0.19 0.91 0.33 粗脂肪48.66c51.68bc53.93b61.38a1.91 <0.010.06 0.02 总能82.14b83.38ab84.27a85.05a0.61 0.02 0.24 0.90 注：1同行数据中肩标不同小写字母之间表示差异显著（
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