Effects of Lactic Acid Bacteria and Fructooligosaccharides on Growth Performance,Nutrient Digestibility and Serum Biochemical Indices of Arctic Foxes (Alopex lagopus) during Early Growth Period北大核心CSCD

This experiment was conducted to study the effects of dietary lactic acid bacteria (LAB) and fructooligosaccharides (FOS) on growth performance, nutrient digestibility and serum biochemical indices of Arctic foxes (Alopex lagopus) during early growth period. Sixty male post-litter Arctic foxes with the average body weight of (1.16±0.15) kg and at the age of (45±3) days were randomly assigned to 4 groups with 3 replicates per group and 5 foxes per replicate. The foxes were fed the following diets, respectively: basal diet (control group), basal diet+3×109 CFU / kg LAB (LAB group), basal diet+5 g / kg FOS (FOS group) and basal diet+3×109 CFU / kg LAB+5 g / kg FOS (LAB+FOS group). The experiment lasted for 30 days. The results showed as follows: 1) on the days 1 to 15, the diarrhea rate of foxes in the LAB group and LAB+FOS group was significantly lower than that in the control group and FOS group (P<0.05). On the days 16 to 30, the average daily gain of foxes in the LAB+FOS group was significantly higher than that in the control group and FOS group (P<0.05), but had no significant difference with LAB group (P>0.05); the diarrhea rate of foxes in the LAB+FOS group was significantly lower than that in the control group and FOS group (P<0.05), but had no significant difference with LAB group (P>0.05); compared with the FOS group, the feed to gain ratio of foxes in the LAB+FOS group was significantly decreased (P<0.05). 2) The dry matter digestibility of foxes in the LAB + FOS group was significantly higher than that in the control group and FOS group (P < 0.05), but had no significant difference with LAB group (P>0.05). There were no significant differences in nitrogen intake, fecal nitrogen, urine nitrogen, nitrogen deposition, net protein utilization and protein biological value among all groups (P>0.05). 3) Serum total protein (TP) content of foxes in the LAB+FOS group was significantly higher than that in the FOS group (P<0.05), but had no significant difference with control group and LAB group (P>0.05). Serum albumin (ALB) content of foxes in the LAB group was significantly higher than that in the control group and FOS group (P<0.05), but had no significant difference with LAB+ FOS group (P>0.05). Serum urea nitrogen (UN) content of foxes in the LAB+FOS group was significantly decreased compared with the control group (P < 0. 05). In conclusion, the combined supplementation of 3 × 109 CFU / kg LAB and 5 g / kg FOS in the diet is beneficial to reduce diarrhea rate, improve dry matter digestibility, improve body immune level, and promote the growth of Arctic foxes during early growth period. © 2023 Chinese Journal of Urology. All rights reserved.     

沈阳市级公园风景园林标志调查与评价

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豫中南多层覆盖草莓高效栽培及关键技术

通过运用多层覆盖栽培和实施关键栽培技术,使草莓种植区域北推、上市时间提前,有效解决了草莓不宜远距离销售问题,经济效益显著提高。     

寒冷地区日光温室茄子高产栽培技术

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浅谈室内设计中低碳理念的应用

21世纪是一个新时代,随着人们生活水平的不断提高,人们逐渐开始重视低碳环保。在全球开始倡导低碳生活的背景下,作为与民生相关的室内设计行业,也逐渐刮起一股"低碳"风。通过考察和研究出低能耗、低污染、低排放为基础的新技术、新工艺、新材料等,并成功将"低碳"理念融入住宅室内设计中将具有非常巨大的意义。     

变风量空调系统控制优化方法研究

提出了“总风量-阀位控制法”和“最大负荷率-最小风量法”分别优化变风量空调系统送风静压和送风温度，并应用到一座实际建筑的变风量空调系统中.建立了变风量空调风系统模型，利用TRNSYS对大楼典型层风系统进行模拟，用实测数据验证模型正确性，模拟分析了典型日变风量系统优化前后的风机能耗.模拟结果表明，与定静压定送风温度的原控制方法相比，优化控制能节约风机能耗，在部分负荷下效果尤为明显，冬季和过渡季试验日的节能率分别为19.38%和15.58%.对2种控制方法下的全年能耗和室内热舒适性进行了试验对比测试，结果表明，全年的节能率为7.16%，而且室内热舒适性得到显著提高.     

一种新型燃气防泄漏多重保护装置的设计

介绍一种新型燃气防泄漏多重保护装置的结构和工作原理,并阐述了控制系统的特点。实验表明,它能在燃气使用前进行检测及自动报警、发生火灾或温度过高时自动关闭燃气开关、用户忘记关闭总闸时定时自动关闭总阀,该装置具有反应灵敏、制动迅速的特点,能够从根本上检测预防燃气的泄漏问题,具有十分广阔的应用前景。     

浅谈基层动物检疫工作中存在的问题及建议

分析了基层动物检疫工作中存在的问题,针对这些问题提出了一些完善对策,提高基层动物检疫工作质量。     

NCG对母牛繁殖性能、血清指标及激素分泌的影响

试验旨在研究N-氨甲酰谷氨酸（NCG）对母牛繁殖性能、血清指标及激素分泌的影响。试验选用60头体重、胎次、预产期相近的妊娠后期安格斯母牛,随机分为4组,每组15头,每个重复1头牛。对照组母牛饲喂基础日粮,试验1组、2组、3组在基础日粮中分别添加10、20、30 g/(头·d)的N-氨甲酰谷氨酸,试验期120 d。结果显示,母牛分娩后,试验3组母牛血清葡萄糖（GLU）和一氧化氮（NO）含量显著高于对照组（P<0.05）;2组、3组母牛血清精氨酸（Arg）含量显著高于对照组（P<0.05）;试验2组母牛血清中黄体酮（P）含量显著高于对照组（P<0.05）;试验3组母牛血清雌二醇（E2）含量显著低于对照组（P<0.05）。母牛配种前,试验2组、3组母牛血清尿素氮（BUN）含量显著低于对照组（P<0.05）;试验2组母牛血清GLU含量显著高于对照组（P<0.05）;各试验组母牛血清Arg及NO含量均显著高于对照组（P<0.05）;试验3组血清E2含量显著高于对照组（P<0.05）;试验2组和试验3组血清P含量显著低于对照组（P<0.05）;...