摘要
在营养水平相同条件下,哺乳仔猪在舍温18°～27℃时表现活泼、采食快、且增重快、仔猪成活率96%,断奶窝重159.9kg;舍温在4°～10℃,仔猪行动呆滞,喜打堆,采食量增加,但增重较慢;舍温在30°～34℃,呼吸频率加快且喜饮水,食欲下降,成活率和窝重最低。对于生长肥育猪,舍温在21℃时,猪增重有所下降;当舍温30℃时,猪肛温达40℃,呼吸频率加快,采食量与日增重显著降低。高温(30°～34℃)时,在猪舍安装8部吊扇,以加速空气对流,试验猪比对照猪食欲正常,躺卧安静,日增重及饲料报酬均提高;低温(4°～10℃),猪舍垫草的试验猪与未垫草的对照猪相比,日增重、饲料报酬均高,且与最适温度(15°～21℃)的基本接近。
Th effects of ambient temperature on the productivity of sucking and growing=finishing pigs were separately studied in the paper.In the same nutritive level,when ambient temperature of pig house was at 18° to 27℃, sucking pigs seemed to be lively,fed rapidly,and grew fast;The surivival rate and weaning litter weight (at 60 day of age) were 96% and 159.9 kg, respectively.At 4° to 10℃,all piglets appeared to be dull,gathered together, feed intake increased,but body weight gained slowly;At 30° to 34℃,respi- ration rate of piglets quickened,water intake increased,appetite decreased;Co- mpared with the formers,the surivival rate and weaning litteri weight were the lowest.For growing-finishing pigs,when ambient temperature was at 21℃, pigs ate much feed,and grew fast;At 27℃,body weight gain decreased slig- htly;At 30℃,respiration rate and rectal temperature increased significantly when compared to that at 21° and 27℃,and feed intake and daily gain decr- eased significantly. At high ambient temperature (30°-34℃),8 elebtric fans were installed in the pigsty to acclerate airflow,as a result,pigs of the trial had a normal appetite,a faster daily gain and a better feed conversion rate when compared to the control,and lay down quietly after feeding,while at low temperature (4°-10℃),compared with the control,the trial with rice straw padding in pigsty obtained a faster daily gain and a better feed conversion rate,which were almost close to those obtained at the optimum temperature (15°-21℃).
出处
《家畜生态学报》
1992年第2期18-22,共5页
Journal of Domestic Animal Ecology
关键词
猪
环境温度
日增重
饲料报酬
呼吸频率
pigs
Ambient temperature
Daily gain
Feed conversion rate
Respiration rate
