Abandon to assure canopy inside air is fresh, warm canopy must install loophole or vent sash, conditional when want mount ventilator, in order to had removed much moisture, maintain abandon inside appropriate humidity and temperature. General air admission hole is set in the bottom that 1/2 of the wall austral warm canopy is in. Steam vent is set on the upside that 1/2 is in or plastic canopy face. Answer everyday ventilated take a breath 2, every time 10 minutes or so can. The beef cattle of fatten raises density inside canopy it is advisable that every ox takes up 5~5.5 square metre is controlled. The measure that fasten of one chamfer, short rope is one Niu Yizhuang, one ox had better be implemented inside warm canopy, picket can rely on to rely on groovy keep down to rest after the ox eats fodder, regurgitation, bask. In such environment, it is inevitable that the beef cattle grows the flesh to add fat quickly.

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