In order to explore the high-yield and high-efficient way of raising pigs in summer, a veterinary station last year from May 2011 to September 2011 carried out a trial with a shade net to cover the playing field in the pen. The pigs were selected from a group of 206 Yorkshire hybrids raised by 37 households. They were randomly divided into two groups. The first group consisted of 107 heads. The shading net was used to cover the playground (cover group) and the second group was 99 heads. Coverage (control group). Both groups of pigs were healthy and disease-free, normal development, age, and body weight were not significantly different. Prefeed period is 7 days. During the pre-feeding period, epidemic prevention, castration and deworming were performed in a unified manner, and fed with the feed formulation during the experimental period. The formula is as follows: corn 47%, bean cake 15%, bran 15%, rice bran 16%, fish meal 2%, yeast powder 2%, bone meal 2%, additive 0.5%, lysine 0.5%. For every 100 kilograms of feed plus 20 grams of multivitamin. The feeding method is wet and mixed feeding, feeding 3 times a day, with no food remaining for the degree. Free drinking water, sterilized on a regular basis, keep pigsty food troughs clean and quiet. The measured data is recorded on a household basis and settled on a regular basis.
The test results show that the coverage of pigs in shaded nets in the summer has the following advantages: 1. Pigs hygiene. There were no mosquitoes and flies in the group pigs, and there were few pig diseases. Second, high daily gains. The average daily gain of the finishing pigs during the finishing period was 650.08 grams, an increase of 29.26 grams over the 502.22 grams of the control group. Third, the unit gains less material. The group fed 3.41 kg of feed per kilogram of weight gain, which was 16.72% lower than the 3.98 kg of the control group. Fourth, good economic returns. According to the compound feed price of 3.66 yuan/kg in the test period and the pig purchase price of 14.52 yuan/kg, the feed fee is required for each 1 kg of weight gain: the coverage group is 8.32 yuan, which is 1.24 yuan less than the 9.56 yuan of the control group; : The coverage group was 443.23 yuan, an increase of 120.01 yuan compared with 323.22 yuan in the control group. The test results also show that the coverage of shading nets in pigs is the best in 6, 7, and 3 months each year, and it is appropriate to raise about 10 heads per lap.
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