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Studies on the energy balance in growing pigs in special reference to the effects of feeding levels and behaviour on heat production in pigs.

研究生长猪的能量平衡，特别是饲养水平和行为对猪产热的影响。

基本信息

批准号：
02660280
负责人：
YAMAMOTO Sadaki
金额：
$ 1.34万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

A significant relationship between heart rate(HR)and heat production(HP)was obtained(r=0.81-0.95^<**->) in three feeding levels(Low, Medium and High)and under a different environmental temperature. The standing ratio per day(%)decreased with an increase in feeding level(r=-0.80^<**>). Two results of the multuple regression analysis of heat production(HP, kJ/kg^<0.75>h) on feeding level(M, divided by maintenace level ME418kJ/kg^<0.75>d), standing min (S, min/h), time lapse after feeding(T, hour)and in the morning(P=0)or in the afternoon(P=1)were as follows.(for body weight 13-15 kg)HP=11.74+6.52M+0.24S-0.33T+0.99P(R=0.85^<**>, n=288, PE=11.6%)(for body weight 38-52 kg)HP= 7.71+8.25M+0.21S-0.34T+1.16P(R=0.92^<**>, n=288 PE=10.5%)The partial coefficient of standing(S)was 0.21-0.24. Using this value, the increase of HP during 1 hour standing was calculated being 12.6-14.4 kJ/kg^<0.75>. The energy cost of standing to daily HP was 2.2-15.8 %. Each HP under the temperature of 31ﾟC, 23ﾟC and 15ﾟC was 518, 576 and 926 kJ/kg^<0.75>day, respectively. Daily HP increased significantly as environmental temperature increased. At each temperature range, the percentage of lying behaviour per day was 89, 83, 73 %, respectively. The lying time decreased with a decrease of environmental temperature. Heat production for a single penned pig was 518 kj/kg^<0.75>d. on the other hand HP for two penned pigs was 497 kJ/kg^<0.75>d at 31ﾟC. At 15ﾟC, HP for a single penned pig was 926 kJ/kg^<0.75>d, and 744 kJ/kg^<0.75>d for two penned pigs. The ratio of lying posture perday was 73 %, 81 % for a single and two penned pigs, respectively.

在低、中、高三个饲养水平和不同环境温度下，心率（HR）与产热（HP）呈显著正相关（r=0.81-0.95）。日站立率（%）随饲养水平的增加而降低（r=-0.80 ^<**>）。产热（HP，kJ/kg·<0.75>h）与摄食水平（M，除以维持水平ME 418 kJ/kg·<0.75>d）、站立min（S，min/h）、摄食后时间（T，h）、上午（P=0）和下午（P=1）的多元回归分析结果如下。(for体重13-15 kg）HP=11.74+ 6.52 M +0.24 S-0.33 T +0.99 P（R=0.85^<**>，n=288，PE=11.6%）（体重38-52 kg）HP= 7.71+ 8.25 M +0.21 S-0.34 T +1.16 P（R=0.92 *，n=288 PE=10.5%）。使用该值，计算1小时静置期间HP的增加为12.6-14.4 kJ/kg^<0.75>。站立消耗的能量占每日HP的2.2- 15.8%。在31 ℃、23 ℃和15 ℃条件下，每只的热耗分别为518、576和926 kJ/kg·<0.75>d。随着环境温度的升高，日HP显著增加。在每个温度范围内，每天躺卧行为的百分比分别为89%、83%、73%。随着环境温度的降低，卧位时间缩短。一头圈养猪的产热为518 kj/kg^<0.75>d。另一方面，在31 ℃时，两只圈养猪的HP为497 kJ/kg^<0.75>d。在15 ℃时，一头圈养猪的HP为926 kJ/kg^<0.75>d，两头圈养猪的HP为744 kJ/kg^<0.75>d。单头猪和双头猪每天卧位的比例分别为73%和81%。