共查询到19条相似文献，搜索用时 187 毫秒
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《家畜生态学报》2021,42(6)
为了研究北方寒冷地区猪舍环境温湿度对育肥猪采食量的影响规律,试验选取内蒙古农业大学海流图科技园区生猪养殖场的30头育肥猪,按不同体重分3组连续测定96 d,分析环境温湿度对不同体重育肥猪采食量的影响。结果表明:舍内温度在10～31℃范围内,随着温度的升高不同体重猪的日均采食量先减小,后缓慢增大最后减小。猪舍温度对不同体重育肥猪采食量的影响极显著(P0.01)。当猪舍相对湿度在45%～90%范围内变化时,不同体重的育肥猪日均采食量随着湿度的增加先增大再减小。猪舍湿度对不同体重育肥猪采食量的影响极显著(P0.01)。在北方干旱寒冷地区实际生产中,育肥猪舍温度控制在17～24℃,湿度应控制在45%～75%为宜。 相似文献
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《养殖与饲料．饲料世界》2016,(12)
温度在15~25℃时猪日增重明显,相对湿度控制在60%~80%时猪生长环境最为适宜,此外有害气体也影响着猪的生长发育。为控制好饲养环境,最大限度地减少有害气体的排放,确保仔猪在育肥期茁壮成长,笔者总结了育肥期猪场温湿度及有害气体排放的环境控制要点。 相似文献
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本试验选用不同的保育及育肥猪舍，通过分别控制保育及育肥舍日清粪次数、猪只日龄及清粪方式设计了4组试验，分别探究保育舍日清粪次数、猪只日龄及育肥舍日清粪次数、清粪方式对猪舍内环境的影响，尤其是对NH3浓度的影响。结果表明：保育舍的日清粪次数对温湿度及有害气体浓度影响没有显著差异，增加育肥舍的日清粪次数可以显著降低舍内NH3浓度，而清粪次数过于频繁也使得舍内CO2浓度上升；随着猪的日龄增长，舍内的温湿度及有害气体浓度均有所增加；采用不同清粪方式的育肥舍中，水冲粪尿沟的育肥舍内NH3浓度显著低于只冲粪沟的猪舍。因此在猪舍的粪污管理中要注意及时清理粪尿沟，随着猪只日龄增加适当加强舍内通风，维持冬季猪舍良好的生长环境需求。 相似文献
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李晓莹 《畜牧兽医科技信息》2022,(1):113-115
近年来,随着生猪养殖的细化管理与饲养技术水平不断提升,不仅革新了传统劳动力消耗较大的人工养殖落后模式,还引进了智能化的温湿度控制系统,对猪舍内部温湿度环境进行动态化监测和调控,为猪生长发育提供良好的环境条件保障.同时还根据猪不同生长发育阶段合理调配日粮比例,以满足猪营养摄取需求.本文向养殖户介绍了饲养育肥猪、生产销售仔... 相似文献
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湿热环境对自由采食生长育肥猪采食行为的影响 总被引：3，自引：0，他引：3
本试验旨在研究湿热环境对自由采食情况下生长育肥猪采食行为的影响。试验选取117头平均体重为(30.26±2.19)kg的健康生长猪,随机平均分到9个测定站,每个测定站采用全自动种猪生产性能测定系统和自动温湿度记录仪分别对采食行为和舍内温湿度进行记录。结果表明:生长育肥猪采食行为表现出明显的昼夜节律变化规律,06:00—09:00和15:00—19:00 2个时间段内的采食量、采食次数、采食时间显著高于21:00—04:00(P0.05),其采食行为的52%以上都发生在这2个时段;温度、相对湿度及其互作能极显著影响生长育肥猪的单位体重采食量、采食时间(P0.01),温湿指数的增加能显著降低单位体重采食量(P0.05)。综上,湿热环境对生长育肥猪的采食行为有显著影响;其采食行为呈现昼夜节律变化。 相似文献
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广金钟 《养殖与饲料．饲料世界》2020,(2):37-38
在辽西地区利用阳光猪舍饲养育肥猪经济效益明显增加,本文根据当地实际情况,对利用阳光猪舍饲养育肥猪的管理措施进行了探讨:在不同季节利用阳光猪舍配套设施对猪舍内温度、湿度、通风等方面进行合理调整,能为育肥猪生长提供适宜环境、增加养殖效益。 相似文献
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采用先进的DST动物生理无线遥测系统和动物环境自动检测系统研究了华东地区夏季高温高湿条件与育成猪体温调节的相关性，结果表明，猪舍环境温湿度指标THI对猪的体温变化影响极显著(P=0.0001)，猪舍环境温湿度指标THI能充分反映猪舍环境的优劣及对猪热调节的影响，发现当温湿度指标THI高于28时育成猪将出现体温升高等明显的热应激反应。 相似文献
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《中国畜牧杂志》2019,(9)
为分析中国南方高温高湿环境对扬翔华系杜洛克后备公猪在生长育肥期采食量、采食时间等采食行为和饲料效率的影响,本研究以扬翔华系杜洛克后备公猪在FIRE测定站的998 195条采食记录为基础,使用温湿度自动监测设备实时监测圈舍温度和湿度。采用R 3.5.1软件统计猪群昼夜采食节律,运用线性混合模型分析不同温湿度水平采食行为和饲料效率的差异,并尝试建立扬翔华系杜洛克生长公猪实际采食量预测模型。结果表明:扬翔华系杜洛克生长猪的采食行为呈昼夜节律变化,受日温度变化影响;当环境温度在20～24℃,温湿指数(THI)在66～71时,生长猪的饲料转化率(FCR)和剩余采食量(RFI)均较低;当环境温度超过25℃,THI超过74时,FCR最高可提高13.98%,RFI最高可提高182.92%。综上可知,在华南地区湿热环境下,当环境温度控制在18～22℃、THI在65～70时,扬翔华系杜洛克生长公猪的采食量较高,FCR和RFI较低,饲料效率较高。THI可作为监测生长公猪热应激的候选指标。 相似文献
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保育猪舍三种局部供暖措施效果比较研究 总被引：1，自引：0，他引：1
为探讨不同局部供暖措施对保育猪局部热环境的影响及其在不同高度上的温湿度变化,对电地暖供暖、红外保温灯供暖和顶板电热板供暖三种局部供暖状况进行了对比分析。试验分析了三种局部供暖所在区域1.0 m高处的温湿度情况和每种局部供暖不同高度(地面、0.3 m、0.7 m和1.1 m)的温湿度变化情况。结果表明,在猪舍整体环境CO2平均浓度5 804 mg/m2,NH3平均浓度21 mg/m3的条件下,电地暖、顶部电热板和红外保温灯所在区域1.0 m处的猪栏温度分别为13.1~16.8℃,14.3~16.9℃和13.7~18.2℃,湿度均为76.4%~98.7%。电地暖、顶部电热板和红外保温灯(中心位置)的地面温度分别为(28.0±0.3)℃、(25.8±0.6)℃和(26.8±0.5)℃,电地暖供暖地面温度显著高于顶部电热板(P<0.05)。仔猪活动范围(距地面0.3 m高度)的局部环境温度保温灯组(中心位置)(21.3±0.7)℃和顶部电热板组(20.7±0.3)℃显著高于电地暖组(18.4±0.4)℃(P<0.05),三种供暖组的仔猪活动区域(0.3 m)的湿度范围是65%~75%,与1.0 m供暖区域湿度水平相比,得到了有效改善。局部供暖可以在一定程度上改善猪只环境,其中,顶部电热板相比电地暖和红外保温灯供暖综合效果更好。 相似文献
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P. K. Pathak R. Roychoudhury J. Saharia M. C. Borah D. J. Dutta R. Bhuyan D. Kalita 《Tropical animal health and production》2018,50(5):1025-1032
The present study was formulated to find out the status of important season related thermal stress biomarkers of pure-bred (Hampshire) and crossbred (50% Hampshire × 50% local) pigs under the agro-climatic condition of Assam State, India. The experiment was also aimed to study the role of different level of energy ration (110, 100, and 90% energy of NRC feeding standard for pig) in variation of physiological and biochemical parameters in two genetic groups of pigs in different seasons. The metabolizable energy value were 3260, 2936.5, and 3585.8 kcal/kg in grower ration and 3260.2, 2936.6, and 3587 kcal/kg in finisher ration for normal energy (NE), low energy (LE) and high energy (HE), respectively. Both the genetic group of animals were housed separately under intensive system of management. Each pen was measuring 10′ × 12′ along with an outer enclosure. Six weaned piglets (almost similar body weight of average 10.55 kg) of each group were kept in a separate pen. However, after attainment of 35 kg body weight, the animals of a group were divided in two pens of three animals each. The present experiment indicated that average ambient temperature during summer months (27.33–29.51 °C) was above the comfort zone for pigs (22 °C). The significantly (P?<?0.01) higher relative humidity (RH) (%) was recorded in outdoor environment (87.26–91.10%) and in the morning time (86.60–91.10%). The temperature humidity index (THI) during the study period was found to be indicative of thermal stress to the experimental animals during summer (79.55–82.56). Physiological parameters viz., respiration rate (RR) and rectal temperature (RT) were significantly (P?<?0.01) higher in summer season (43.75–72.12 breaths/min. and 102.29–103.23 °F) and non-significantly higher values were recorded in Hampshire pigs. It was also found that the significantly (P?<?0.01) lower RR as well as RT was recorded in the pigs fed with high energy (HE) ration during summer season. Serum triiodothyronine (T3) and thyroxine (T4) concentrations were significantly (P?<?0.01) lower during summer, while both the genetic groups showed significantly (P?<?0.01) higher concentration of serum cortisol during summer season. It was also observed that thyroid hormone and cortisol concentrations were maintained in groups of pig fed vegetable oil incorporated HE diet during summer. From the present study, it is found that the increasing the energy level of the ration might be helpful to minimize the effects of thermal stress during summer. 相似文献
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本试验研究了不同相对湿度(RH)对日增温环境中肉仔鸡生理指标的影响。试验选取22日龄爱拔益加(AA)肉仔公鸡180只转入人工气候试验舱,随机分成3个组,每组6个重复,每个重复10只鸡。适应期7 d,温度20℃,RH为60%。肉鸡29日龄时,试验RH分别调整到35%、60%和85%,至试验结束。环控舱内温度每天升高2℃,试验期共9 d。肉鸡37日龄时,环控舱舱内温度升高至38℃,试验期间肉鸡自由采食饮水,试验全程不抓鸡,选择非接触性生理指标进行测定,以尽量避免肉鸡产生应激。结果表明:肉鸡体核温度(CT)、耳叶温度(ET)、小腿温度(LT)、呼吸频率(RR)、采食量(FI)和饮水量(DW)均存在拐点温度(IPt)。首先变化的是LT,其产生变化的环境温度范围是24.6~25.1℃,之后是ET和CT,发生变化的环境温度范围分别是25.0~25.1℃和25.5~26.4℃。RR存在2个IPt(IPt1和IPt2),温度范围分别是25.5~27.2℃和32.5~33.3℃。环境温度大于IPt1值时,RR随温度升高而升高;环境温度大于IPt2值,RR随温度升高而下降。FI、DW发生变化的环境温度范围分别为27.1~29.3℃和29.2~29.5℃,环境温度大于IPt值后,FI和DW随温度升高而降低。高湿组FI的IPt值显著高于低湿组和中湿组(P0.05),高湿组死亡率(MR)的IPt2值显著小于低湿组和中湿组(P0.05),高湿组CT、ET、LT、RR、FI和DW的IPt值小于中湿组和低湿组,RH对ET、LT、RR和DW模型参数均无显著影响(P0.05)。结果提示:环境温度对肉仔鸡生理指标影响较大,RH影响较小。FI下降和CT升高的IPt值可被认为是上限临界温度,4~5周龄肉仔公鸡CT上限临界温度为25.5~26.4℃;RR开始升高和FI开始下降的上限临界温度分别为25.5~27.2℃和27.1~29.2℃;死亡的上限临界温度在为32.7~33.5℃。肉仔鸡死亡时CT高出常数值4.6~5.1℃。4~5周龄肉仔公鸡不同生理指标有着不同的上限临界温度。 相似文献
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E T Kornegay J B Meldrum G Schurig M D Lindemann F C Gwazdauskas 《Journal of animal science》1986,63(2):484-491
Three trials using 240 weanling pigs were conducted during winter months to determine the influence of nursery temperature ("comfortable" vs "cold") on the response of weanling pigs to added vitamin C (700 ppm) or E (55 IU/kg) to a corn-soybean meal diet. A "comfortable" temperature schedule (27 C initially with a weekly 2 C drop) was maintained in one nursery, with the temperature schedule in the "cold" nursery about 8 C lower. Plasma concentrations of vitamin C and vitamin E were elevated when the respective vitamins were added to the diet, but were not consistently influenced by nursery temperatures. Daily gain, daily feed intake and feed efficiency were not improved with the added C or E. Daily feed intake was increased and feed-to-gain ratios were larger for pigs housed in the "cold" nursery compared with pigs housed in the "comfortable" nursery; however, daily gains were similar in the two environments. Pigs housed in the "cold" nursery were slightly stressed, as indicated by heavier adrenal glands, but the antibody response and serum glucocorticoid concentrations were not significantly affected by either diet or temperature. 相似文献
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相对湿度对家禽水蒸发散热和健康的影响 总被引：3，自引：0，他引：3
相对湿度(RH)作为温热环境的重要因素之一,与温度和风速等共同影响家禽的热平衡状态。当RH适宜时,蒸发散热(EHL)达到最大;高温环境下,高湿会阻碍家禽的EHL,从而造成体温上升、呼吸加快、食欲下降,严重时导致酸碱平衡紊乱、热虚脱和呼吸性碱中毒。本文主要综述水蒸发散热(EWL)在家禽热平衡调节中的重要作用,及RH对家禽EWL的影响,并结合由此而引发的对家禽健康的影响,探讨RH在家禽实际生产中的重要作用。 相似文献
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试验通过可拆迁式猪舍与传统(固定)猪舍的饲养对比试验,研究了冬季可拆迁式猪舍对生长肥育猪的生长性能及舍内温度和相对湿度的影响。选取同期转群、体重30 kg左右杜大长生长猪216头,随机分成可拆迁式猪舍组和传统猪舍组,每组3个重复,每个重复36头。试验至猪体重达到100 kg左右出栏结束。结果表明:可拆迁式猪舍组试猪的平均日增重和平均日采食量分别比传统猪舍组提高17.28%(P0.01)和12.13%(P0.01),饲料料增重比降低7.00%(P0.05);可拆迁式猪舍的舍内平均温度为20.33℃,比固定猪舍的16.86℃高3.47℃,比室外的15.15℃高5.18℃,差异均极显著(P0.01)。试验结果表明,可拆迁式猪舍对生长育肥的生长性能和室内环境控制优于传统猪舍。 相似文献