哺乳仔猪的消化生理特点

哺乳仔猪是指从出生到断奶阶段的仔猪。仔猪出生前,完全依靠母体供给营养物质和排泄废物;出生后,物质的供应和废物的排出必须通过消化道来完成。对哺乳仔猪饲养管理的好坏,直接影响以后各阶段的生长发育,     

秋大葱高产栽培技术

辽宁省铁岭市出产的大葱．以独棵、白长、味美等特点闻名中外。是辽宁蔬菜名产之一。铁岭大葱已有上百年的种植历史。大葱中含有多种维生素、蛋白质、脂肪等营养物质，还有大量的挥发性精油，叫葱蒜辣素，其味异样香辣，有较强的杀菌作用。大葱作为一种大众化蔬菜品种，拥有较大的消费群体。下面，介绍一下秋大葱的高产栽培技术。     

架子牛快速肥育技术

肉牛规模化养殖主要采用架子牛肥育技术。架子牛是指从断奶到育肥前的生长牛,按年龄可以划分为断奶犊牛、1岁牛和2岁牛。架子牛肥育需要的主要营养物质包括能量、蛋白质、无机盐、维生素和水,需要最大的是能量。扣除买架子牛的费用,饲料费用占肥育费用的75%左右。因此,提高饲料利用率是降低成本,获得较好经济效益的关键。     

日粮中添加不同水平复合酸化剂对肉鸡屠宰性能及营养物质代谢率的影响

选择1日龄AA肉仔鸡450只,随机分成对照组和5个试验组,研究日粮中添加不同水平的复合酸化剂对肉仔鸡屠宰性能及营养物质利用率的影响。5个试验组日粮中的酸化剂添加量分别为0.1%、0.15%、0.2%、0.25%和0.3%,试验期为42 d。结果表明:添加复合酸化剂显著降低了各试验组日粮系酸力,显著提高了半净膛率、胸肌率、腿肌率,对屠宰率、腹脂率无显著影响,显著提高生长阶段饲料蛋白、干物质、能量、钙和磷的表观消化率。根据研究结果得出,添加量0.15%效果最佳。     

葡萄采收后生产管理仍要加强

葡萄果实采收后，叶片的同化作用仍在继续进行中，所生产的营养物质开始在新梢、多年生枝蔓和根系中积累。从果实采收后到落叶期间，树体营养物质积累的多少与枝蔓成熟、安全越冬，以及第二年长势，花芽分化、开花结果、产量和品种都有十分密切的关系。因此，葡萄果实采摘后，     

猪舍环境条件与养猪生产

1猪舍环境条件与养猪的关系 猪在生长发育过程中不断地从外界摄取营养物质，这些营养物质一部分用于维持体内平衡，剩余部分才用于生产如增重、繁殖等，这是因为维持体内平衡是生存的需要，是主要的；生产是次要的。     

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.     

石家庄地区黄秋葵病虫害综合防治技术

黄秋葵(Hibiscus esculentus L.)是锦葵科草本植物,其果实富含果胶、蛋白质、纤维素、多糖、膳食纤维等营养物质,是一种具备保健功能的高档蔬菜[1,2]。石家庄市地处华北平原中部,属北温带大陆性季风气候,四季分明、光照充足、昼夜温差较大。黄秋葵在石家庄地区一般在4月下旬露地播种,6月下旬开始采收,采收期在110~120 d,每667 m^(2)产量可达2 000 kg及以上,具有较好的经济效益。     

笼养蛋鸡常见病防治

笼养蛋鸡的生长环境与散养蛋鸡存在着较大的差异,因长时间脱离地面无法自由活动,同时不能随意探寻机体所需营养物质,导致笼养蛋鸡在实际生长过程中极其容易患病,轻者鸡群产蛋量明显降低,重者可能会引发鸡只的死亡。因而,养殖户需要掌握笼养蛋鸡常见病极其防治措施。     

Effect of Different Dietary Nutrition Levels on Fattening Effect of Holstein Bulls

This experiment was conducted to study the effect of different dietary nutrition levels on fattening effect of Holstein bulls.48 4-month-old Holstein bulls with an average body weight of 128 kg were allocated into two groups,group Ⅰ was fed a low nutrition level diet,group Ⅱ was fed a high nutrition level diet.Each group had 24 Holstein bulls.The pre-test period lasted for 7 days and the trial period lasted for 245 days.The results showed that compared with group Ⅰ,the ADG in group Ⅱ was significantly increased by 6.36% (P<0.01),while the F/G in group Ⅱ was decreased by 6.55%.With the increasing of dietary nutrition levels,the apparent digestibility of CP,EE,NDF,ADF,Ca and P were rising,but there was no significant differences between two groups (P>0.05).Compared with group Ⅰ,the serum GLU,AST,ALT and GH contents in group Ⅱ were increased by 12.52%,12.85%,9.68% and 13.24% (P<0.05),respectively,while the serum BUN content in group Ⅱ was decreased by 10.98% (P<0.05).Compared with group Ⅰ,the feeding profits of group Ⅱ increased by 1.37 yuan/(head·day),the total economic benefit of group Ⅱ increased by 335.65 yuan/head.In conclusion,the improvement of dietary nutrition levels could improve the fattening performance and the economic benefit of Holstein bulls.