架子牛快速育肥的技术措施

架子牛是指未经肥育或不够屠宰体况,年龄在4岁以内的牛。这类牛多是在较粗放的条件下饲养到2-3周岁,体重达300公斤以上,出售到粮食及加工副产品多的地区进行高营养短期强度催肥,从而获得较高的日增重。催肥期视牛的情况不同,少则3个月,     

架子牛快速育肥的技术措施

1　购牛前的准备购牛前 1周 ,应将牛舍器具进行消毒。如果是敞开式圈舍。冬季应搭塑料暖棚 ,夏季应遮荫 ,既使其通风良好 ,又使其温度不低于 5 %。2　架子牛的选购架子牛的优劣决定着肥育质量及经济效益 ,应予以充分的重视。选购架子牛应注意以下几个环节。①选好牛种。要选购用夏洛来、西门塔尔、利木赞等与本地黄牛杂交的后代 ,这样的牛肉质好 ,生长快 ,饲料报酬高。②准确判断牛的年龄。年龄较小 (1～ 3岁 )的架子牛往往容易育肥 ,肉质好、长的快、省饲料。③体貌好的牛。头要短宽 ,脊背要宽 ,体型要大 ;皮要松软、有弹性。用拇指和食指…     

架子牛快速育肥技术要点

肉牛育肥最佳季节是春、秋两季(3～6月份、9～11月份)。这两个季节国内肉牛价格较好，牛在运输过程中不易出现冷应激或热应激现象。在市场行情好的情况下，也可以在最冷的冬季育肥，但舍温必须保证5℃以上。炎热季节7～8月份不宜育肥。     

架子牛育肥技术

目前,在新疆一部分地区,部分农牧民采用购买架子牛育肥后出售的方式作为一条致富途径,但育肥技术的好坏直接影响着育肥效果.下面就架子牛育肥技术谈几点看法:     

架子牛快速育肥技术要点

架子牛快速育肥是肉牛生产的重要阶段，随着我国畜牧产业结构的调整及国内外肉类市场需求的变化，肉牛生产将出现蓬勃发展的趋势。目前，我国架子牛育肥生产，各地技术差别较大，产品质量参差不齐，经济效益高低不一，在国际市场缺乏竞争能力，为提高我国架子牛快速育肥标准化，特制定本技术要点，与同仁共同商讨。     

架子牛快速育肥技术要点

1育肥季节的选择 肉牛育肥最佳季节是春、秋两季(3～6月份、9～11月份)。这两个季节国内肉牛价格比较好，牛在运输过程中不易出现冷应激与热应激现象。在市场行情好的情况下．也可以在最冷的冬季育肥，但舍温必须保证5℃以上。炎热季节7～8月份不宜育肥。     

架子牛快速育肥技术

<正>架子牛育肥是将1~2岁具有一定的状况,欠丰满的牛集中于同一个牛舍3~4个月,采取强制育肥,从而达达到了增重的目的,架子牛的育肥经常是利用廉价的农饲料来育肥,不仅成本低廉,饲料报酬高,而且产肉高,出栏率高。经济效益良好。本论文从架子牛的选择,育肥,饲养管理等各个方面介绍了架子牛快速育肥技术。1育肥前的准备1.1准备圈舍首先考虑的是环境方面的因素,育肥场最好要选择在远     

提高种公牛利用率的技术措施

本文针对目前部分牛场在种公牛引进、管理和利用方面存在的问题进行了,从遗传选择和饲养管理方面提出了提高种公牛利用率的技术措施。     

Aflatoxicosis in feeder cattle

Aflatoxicosis was diagnosed as the cause of deaths in a group of crossbred feeder steers. Corn used in the ration being fed the steers was found to be contaminated with 1,500 ng of aflatoxin/g. Residues of the mycotoxin were detected in kidney tissue, and microscopic examination of liver sections revealed lesions typical of aflatoxicosis.     

肥育猪饲喂器的管理

当全球饲料价格飞涨时,肥育猪舍饲喂器的选择和维护变得十分重要. 1 饲喂器的选择 在今天这么高的饲料价格下,必须要格外注意如何合理使用饲料.养猪场最负担不起的事就是浪费,无论是每次喂料时从漏缝地板缝隙漏掉的溢出料,还是因饲料利用率低于标准所造成的浪费.     

Effect of transport on feeder calves

One hundred fifty feeder steers (mean body weight, 195 kg) were assigned to 1 of 3 transport groups and were deprived of feed and water (fasted) for 24 hours. Additionally, calves were transported on a commercial livestock trailer for 0 (control-fasted only), 12 (short haul), or 24 (long haul) hours. Blood samples were obtained from the jugular vein before calves were loaded on the transport vehicle and immediately after calves of the long-haul group returned to the research feedlot. Complete blood counts were performed and 32 mineral, enzyme, and biochemical constituents were measured. Calf morbidity, mortality, and average daily weight gain were evaluated during the next 56 days. Duration of transport did not affect average daily gain; however, calves of the short-haul group had significantly (P less than 0.05) higher morbidity and mortality than did those of the control and long-haul groups. In all groups, results of differential leukocyte counts were indicative of stress response. Significant (P less than 0.05) linear contrasts were observed between duration of transport and erythrocyte, leukocyte, segmented neutrophil, lymphocyte, and eosinophil counts and results of serum enzyme (alanine transaminase, hydroxybutyrate dehydrogenase, total lactate dehydrogenase [LD], and LD-1, LD-3, and LD-4 isoenzymes), iron, urea nitrogen, beta-globulin, glucose, and urea nitrogen-to-creatinine ratio determinations. Significant (P less than 0.05) quadratic contrasts were observed between duration of transport and serum unsaturated iron binding capacity, total iron binding capacity, and LD-5 percentage. Calf source had a significant (P less than 0.05) effect on almost all variables tested.(ABSTRACT TRUNCATED AT 250 WORDS)     

Lead poisoning in feeder calves

A group of 90 feeder calves was accidentally exposed to lead for approximately 30 days. The source of the intoxication was determined to be contamination of feed ingredients from a railroad car. Fourteen calves died and 8 more were clinically affected. Blood samples were obtained from 24 exposed calves (16 clinically normal and 8 intoxicated), and the samples were analyzed for lead, delta-amino levulinic acid dehydrase activity, and free erythrocyte porphyrin. Blood lead values ranged from 0.44 to 1.16 parts per million. Amino levulinic acid dehydrase activity was not affected enough to be of diagnostic value, whereas free erythrocyte porphyrin was increased dramatically and consistently in lead-exposed cattle.