Brumm M C, Shelton D P
Dept. of Anim. Sci., University of Nebraska, Concord 68728.
J Anim Sci. 1988 May;66(5):1067-72. doi: 10.2527/jas1988.6651067x.
A four-trial experiment utilizing 3- to 4-wk-old newly weaned pigs was conducted to evaluate the effect of a modified reduced nocturnal (MRNT) nursery temperature regimen on weaned pig and subsequent grower-finisher performance. Nursery treatments were 1) a control temperature (CT) regimen of 30 degrees C constant air temperature lowered 2 degrees C/wk and 2) a regimen beginning 1 wk after weaning in which the temperature from 1900 to 0700 was lowered 6 degrees C from CT. Weaned pigs gained faster (P less than .01) in the MRNT treatment than in the CT treatment, with gains in Trials 1, 2, 3 and 4 being .39 vs .37, .28 vs .27, .38 vs .37 and .39 vs .36 kg/d, respectively. This improvement in gain was due to an increase (P less than .005) in feed intake for the same periods (.60 vs .58; .48 vs .42; .59 vs .58; .63 vs .58 kg/d). There was no difference in feed conversion (P greater than .1). There was no effect (P greater than .1) of MRNT vs CT on subsequent performance to slaughter weight for average daily gain (.69 vs .69 kg/d), average daily feed (2.22 vs 2.23 kg/d) or gain/feed (.31 vs .31). These results support the conclusions that weaned pigs eat more feed and gain faster with a reduced nocturnal temperature scheme and that there are no carry-over effects during the growing-finishing phase.
开展了一项四阶段试验，使用3至4周龄刚断奶的仔猪，以评估改良的夜间低温（MRNT）保育舍温度方案对断奶仔猪及后续生长育肥猪生产性能的影响。保育舍处理方式为：1）对照温度（CT）方案，即空气温度恒定在30℃，每周降低2℃；2）断奶1周后开始实施的方案，即19:00至07:00的温度比CT降低6℃。MRNT处理组的断奶仔猪生长速度更快（P < 0.01），第1、2、3和4阶段的日增重分别为0.39 vs 0.37、0.28 vs 0.27、0.38 vs 0.37和0.39 vs 0.36千克/天。增重的改善归因于同期采食量的增加（P < 0.005）（分别为0.60 vs 0.58、0.48 vs 0.42、0.59 vs 0.58、0.63 vs 0.58千克/天）。饲料转化率无差异（P > 0.1）。MRNT与CT对后续生长至屠宰体重阶段的平均日增重（0.69 vs 0.69千克/天）、平均日采食量（2.22 vs 2.23千克/天）或增重/采食量（0.31 vs 0.31）均无影响（P > 0.1）。这些结果支持以下结论：采用夜间降温方案时，断奶仔猪采食量增加、生长速度加快，且在生长育肥阶段没有残留效应。
