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首页> 外文期刊>Current Journal of Applied Science and Technology >Effects of Natural Building Ventilation Openings onRabbit Does in Humid South West Nigeria
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Effects of Natural Building Ventilation Openings onRabbit Does in Humid South West Nigeria

机译：尼日利亚西南潮湿自然建筑通风口对兔子的影响

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The research investigated the effects of building ventilation resulting from different combinations of building orientation and opening on some reproductive parameters. The study was 2 x 4 factorial design and carried out at rabbitry section of the Teaching and Research Farm, Obafemi Awolowo University, Ile-Ife, Nigeria between September 2009 and April 2011. Four identical adjoining buildings, each with eight pens with three factors: building orientations, BO (45o, 90o); ventilation openings, VO (20, 40, 60, 80%); seasons (dry, rainy) at 4 replicates each (n = 32 pens) were used. There was a control experiment with n = 4 does, each in a pen. Measured were the weights of the doe before conception, weights during gestation period and weights of does just before weaning. Temperature-humidity indices-THI, of the pens were also calculated. Weight gain by litters was significantly affected ( P = .05) by BO. VO had significant effect ( P = .05) on litters’ percent mortality. At weaning, 80% VO had the highest litters’ cumulative weight, 26% (194.375 g), while cumulative weight, 21% (166.5 g) for 60% VO at 45o orientation. Regression analysis showed stronger association between different combinations of various building orientations and openings and the weight gains by the litters during lactation. Temperature and humidity values in rabbits’ housing when controlled to the prevailing wet season values between 24oC-27oC and at 80% VO in windward direction in the tropics could allow rabbit does to have increased weights.
机译：该研究调查了建筑物通风和通风对不同生殖参数的影响。这项研究是2 x 4因子设计，并于2009年9月至2011年4月之间在尼日利亚伊费费尔的奥巴贝米·阿沃洛沃大学教学与研究农场的养兔场进行。四个相邻的相同建筑物，每个建筑物有八支钢笔，包含三个因素：建筑物方向，BO（45o，90o）;通风口VO（20％，40％，60％，80％）;使用4个重复的季节（干燥，多雨）（n = 32支）。有一个控制实验，每组一支笔，n = 4个。测量的是母猪受孕前的体重，妊娠期的体重和断奶前的体重。还计算了笔的温度-湿度指数-THI。垫料猪的体重增加显着影响（P = 0.05）。 VO对产仔死亡率有显着影响（P = 0.05）。断奶时，80％VO的凋落物累积重量最高，为26％（194.375 g），而45o取向时60％VO的累积重量为21％（166.5 g）。回归分析表明，在哺乳期间，各种建筑物朝向和开口的不同组合与垫料的重量增加之间有更强的关联。在热带地区，将兔子的住房中的温度和湿度值控制在24oC至27oC之间的主要湿季值和热带地区上风向的VO值为80％时，可使兔子的体重增加。

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