Effect of anti-nutritional factors on the performance of pigs after wheat replacement of a certain proportion of corn

For a long time, the supply of feed resources in China has been tight, and corn has been widely used as an energy feed in the production of compound feed for pigs. It has become more and more widely used in industrial production, and the supply of corn has become increasingly tight. This status quo can not only meet the needs of animal husbandry for feed, but also has become a bottleneck restricting the development of animal husbandry. Therefore, the development of new energy feed ingredients is one of the important issues in the development of animal husbandry. Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

As an important food crop in China, wheat has limited its application in livestock and poultry feed because it contains anti-nutritional factors (mainly arabinoxylan). In China, wheat is not used for feed production, but it has been widely used abroad. In recent years, domestic wheat production has continued to increase, and some wheat producing areas have even experienced a backlog. Wheat prices are lower than corn for a certain period of time or for a period of time, which provides a price advantage for large quantities of livestock feed. At present, some domestic feed production enterprises and farms have begun to try to add wheat to the feed instead of the traditional energy feed corn. How to use wheat reasonably has become a research hotspot in the field of animal nutrition and feed science in China. Using wheat instead of corn as an energy feed can not only reduce the cost of animal husbandry production, but also solve the problem of food backlog, killing two birds with one stone. Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

In this experiment, wheat was used to replace a certain proportion of corn. Anti-nutritional factors were overcome by adding exogenous enzyme preparations. The effects of adding different levels of wheat and complex enzymes on the performance of growing and finishing pigs were studied, and the complex enzymes in the diet were determined. The appropriate addition level of the preparation provides a scientific basis for better use of wheat as an energy feed for growing pigs in production. Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

Ffj China Feed Industry Information Network - based on feed, serving animal husbandry
1 Materials and methods Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

1.1 Experimental Design Ffj China Feed Industry Information Network - Based on Feed, Serving Livestock

In the experiment, 32 pairs of Du × Chang × Da Sanyuan crossbred pigs with 42 d were used, the average body weight was 20±2.3 kg, and the male and female were half each. The difference between the statistical test groups was not significant. The design of the experiment was based on one-way analysis of variance, with four treatments, positive control, negative control, and trials 1 and 2, each treating 8 pigs. Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

1.2 Dietary Composition Ffj China Feed Industry Information Network - Based on Feed, Serving Livestock

The positive control group was corn-soybean meal diet, the negative control wheat replaced some corn in the positive control diet (25% of the diet level), and the trials 1 and 2 added 0.02% and 0.04% respectively on the negative control basis. Wheat-specific complex enzyme. The composition of the diet and nutrients are shown in Table 1. Table 1 Test diet and its nutrient content% Ffj China Feed Industry Information Network - based on feed, service animal husbandry

Note: The premix provides the required amount of trace elements and vitamins specified by NRC (1998) for compound feed. Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

[NextPage] Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

Ffj China Feed Industry Information Network - based on feed, serving animal husbandry
Ffj China Feed Industry Information Network - based on feed, serving animal husbandry
1.3 Enzyme preparation Ffj China feed industry information network - based on feed, service animal husbandry

The main components of the complex enzyme preparation are xylanase and xylanase. Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

1.4 Feeding Management Ffj China Feed Industry Information Network - Based on Feed, Serving Livestock

The trial was conducted on October 11, 2009 at the Ruifeng Pig Farm in Xian County, Zhangzhou. Deworming and vaccination were performed before the start of the trial. After the test pigs were grouped, the pre-feeding period was 10 days, and the test period was 28 days. All the pigs were free to eat and drink during the test period. The feed intake and health status were recorded every day, and the body weight was weighed every 2 weeks. The rest was carried out according to the routine management of the farm. Feeding. Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

1.5 Measurement indicators and methods Ffj China Feed Industry Information Network - based on feed, service animal husbandry

The starting weight of the test pigs and the body weight at the end of the test were weighed and the feed intake during the test was recorded. Based on this, the average daily gain, feed intake and feed-to-weight ratio were calculated and analyzed for economic benefits. Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

Average daily gain (ADG) = weight gain / (test days × test pigs); Ffj China feed industry information network - based on feed, service animal husbandry

Material to weight ratio (F/G) = feed consumption / weight gain. Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

1.6 Statistical Analysis Ffj China Feed Industry Information Network - Based on Feed, Serving Livestock

All test data were analyzed by one-way ANOVA using SPSS 11.5 data analysis software. Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

2 Results and analysis Ffj China Feed Industry Information Network - based on feed, service animal husbandry

2.1 The effect of wheat diet plus compound enzyme on the average daily gain of pigs Ffj China Feed Industry Information Network - based on feed, service animal husbandry

The weight gain rate and feed utilization efficiency of the test pigs are shown in Table 2. As can be seen from Table 2, the use of wheat instead of corn in the diet significantly reduced the daily gain of pigs, and the daily gain in the whole period decreased by 5.36%, with a reduction of 32.9 g/d (p<0.05). After adding the xylanase-based complex enzyme preparation, the production performance of the pigs in the two test groups was significantly improved compared with the positive and negative control groups; the daily weight gain of the test period, the test 1 and 2 were respectively lower than the negative control group. The increase was 11.30% and 9.04% (P<0.05); it was 5.33% and 3.20% higher than the positive control group (P<0.05). The maximum weight gain was obtained in the experimental group 1 pigs; however, the difference between the two groups was not significant (p>0.05). The daily weight gain in the pre-test period was similar to that in the whole trial period; the level difference between the two trial groups was significant (p<0.05). When the level of wheat added in the growing pig diet is 25%, the appropriate level of enzyme addition is 0.02%. Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

2.2 The effect of wheat diet plus compound enzyme feed on feed conversion efficiency Ffj China Feed Industry Information Network - based on feed, service animal husbandry

It can be seen from Table 3 that after replacing a certain proportion of corn diet with wheat, compared with the corn-soybean meal diet, the feed conversion ratio was significantly lower (p<0.05), regardless of the early, late or full period (p<0.05). The effects of anti-nutritional factors. After the addition of the complex enzyme, the feed conversion rate was significantly improved (p<0.05). Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

The amount of compound enzyme added was different, and the feed conversion rate of wheat diet had a significant effect at the beginning of the experiment (1~14d) (P<0.05). Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

2.3 Analysis of Economic Benefits Ffj China Feed Industry Information Network - Based on Feed, Serving Livestock

The corn-soybean type feed price is 2 438 yuan / t, and the wheat - corn - soybean meal type is 2 322 yuan / t. The price of the pig is 14 yuan / kg, and the price of wheat compound enzyme is 80 yuan / kg. In terms of economic benefits, when wheat prices are lower than corn, replacing a certain proportion of corn with wheat and adding a xylanase-based complex enzyme can significantly improve economic benefits (Table 4). Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

[NextPage] Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

Ffj China Feed Industry Information Network - based on feed, serving animal husbandry

2.4 Appearance observation, incidence of diarrhea and disease situation Ffj China Feed Industry Information Network - based on feed, service animal husbandry

According to the observation and record of pigs during the experiment, there was no significant difference in the appearance of the test pigs. All the pigs were bright and healthy, and the incidence of diarrhea was very low in most of the pigs. Only the unconjugated wheat group was added. The test pigs had a small amount of diarrhea. Table 2 Effect of enzyme-added wheat diet on average daily gain of pigs Ffj China Feed Industry Information Network - based on feed, service animal husbandry