作者: swordman33 時間: 2010-11-23 13:40
嗯,算上人工沒?作者: kfllzx 時間: 2010-11-23 14:15
用鍋爐取暖確實不錯。雖然成本高。作者: xiaofeng850819 時間: 2010-11-25 09:14
我們用的是加熱器,燒氣的。作者: nkrcjg 時間: 2010-12-8 16:05
美國《豬病學》第九版第7頁有這麼一句話,擇錄如下:
The lower critical limit is the temperature
below which a pig will use extra feed to maintain its
body temperature (Barnett et al. 2001). Pigs provided
with straw in the winter months will tolerate a lower
temperature. For every 5°C below the lower critical temperature,
sows will need to be fed an extra 250 g
feed/day. For every 1°C below the lower critical temperature
for grower/finisher pigs, each pig will have to consume
an extra 3.3 kg of feed to reach market weight.