Cooling Effect of Novel Environmental Control Greenhouse Commercial Rabbitry in Summer
This experiment aimed to investigate the cooling effect of a novel environment control green-house rabbitry in summer.A total of 2880 rabbits were randomly divided into three treatments,with 20 replicates per treatment.The negative control group was housed in an open rabbitry,the positive control group was housed in a European-style rabbitry,and the experimental group was housed in the novel envi-ronment control greenhouse rabbitry.The results showed that the average temperatures and temperature-humidity indices in the greenhouse rabbitry and European-style rabbitry were 27.52 ℃,27.62 ℃,and 27.11,27.22,respectively.These values were significantly reduced by 5.71 ℃,5.61 ℃,and 4.06 ℃,3.96 ℃ compared to the outdoor and open rabbitries,respectively(P＜0.05).The temperature-humidity indices were significantly reduced by 4.51,4.40 and 3.24,3.13,respectively(P＜0.05).The cooling effect of the greenhouse rabbitry was not significantly different from that of the European-style rabbitry(P＞0.05).The indoor wind speeds in the greenhouse rabbitry and European-style rabbitry were 1.32 m/s and 1.28 m/s,respectively,which were significantly increased by 0.57 m/s and 0.53 m/s compared to the open rabbit-ry(P＜0.05).Although the concentrations of carbon dioxide and ammonia in the rabbitry increased slight-ly,the differences were not significant compared to the open rabbitry(P＞0.05).The feed intake and daily weight gain of the commercial rabbits in the greenhouse rabbitry and European-style rabbitry were signifi-cantly higher than those in the open rabbitry(P＜0.05),while the feed-to-weight ratio and mortality rate were significantly lower than those in the open rabbitry(P＜0.05).The time to market for commercial rabbits in the greenhouse rabbitry was 14 days earlier than that in the open rabbitry,with no significant difference between the two.These results indicate that the greenhouse rabbitry can effectively reduce the temperature in summer,improve the thermal environment of the rabbitry,enhance the production per-formance of commercial rabbits,and achieve a cooling effect significantly better than that of the open rab-bitry,comparable to that of the European-style rabbitry.
environmental control greenhouse rabbityEuropean type rabbitryopen rabbitrycool-ingproduction performance
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