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以不同年份收获的燕麦(Avena sativa)种子（Lot2004,Lot2007,Lot2008）为试验材料,采用标准发芽、快速发芽、电导率测定、甲醇劣变处理和人工老化处理方法,对燕麦种子活力进行测定。同时进行了田间种植出苗试验,测定不同储藏年限种子的田间出苗率及田间出苗时间,并分析各室内测定指标与田间出苗率及田间出苗时间的相关性。结果表明,甲醇劣变处理、人工老化处理、标准发芽测定与田间出苗率的相关性均不显著（P>0.05）,而平均发芽时间MJGT（胚根伸出种皮）和MGT（胚根至少2 mm）与田间出苗率显著相关（P<0.05）,可以较好预测种子批的田间出苗情况。 相似文献
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本试验以2份发芽率不同的高丹草种子（Lot1和Lot2）为对象,研究比较不同的老化温度（39℃、41℃、43℃和45℃）和老化时间（24h、36h、48h、60h、72h、84h和96h）对高丹草种子发芽率的影响,筛选高丹草种子进行人工加速老化测定的适宜条件。结果表明,在老化温度处理中,随着老化温度的升高, Lot1和Lot2发芽率显著下降（P〈0.05）,43℃老化效果最明显,Lot1发芽率由65%降至25%,Lot2发芽率由46%降至16%;在老化时间处理中,随着老化时间的延长,Lot1和Lot2发芽率显著下降（P〈0.05）,老化60h后种子发芽率降幅最大;老化温度与老化时间是促进种子老化的关键因素。 相似文献
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Thabti F Fronzaroli L Dlissi E Guibert JM Hammami S Pepin M Russo P 《Veterinary research》2002,33(1):35-45
Pestiviruses have been isolated from live sheep pox Tunisian vaccines. Vaccination with these vaccines caused outbreaks of Border Disease in Tunisia. In order to study more precisely the pathogenicity of these isolates, three groups of eight four month old lambs from a pestivirus-free flock were infected by the intratracheal route with a French strain (AV) and two Tunisian isolates (SN3G and Lot21). Clinical, hematological, immunological and virological parameters were evaluated. The three groups developed mild fever and leucopaenia by day 3 to 6 post infection (pi). The differences in the weight curves were not significant. Viruses were isolated from the peripheral blood buffy coat cells by day 4 to 9 pi. Antibodies were present on day 16 pi following infection by the French strain and on day 21 pi with the Tunisian isolates. The results demonstrated that SN3G and Lot21 are almost similar to the French strain used as the reference strain. In field conditions, they could induce economical losses in naive flocks, alone or in association with other pathogens. 相似文献
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应用全价混合料（TMR）饲喂奶牛技术是奶牛养殖业走向现代化、科学化必由之路.低成本优化设计全价混合料配方和精确计算奶牛每天风干饲料采食量是实现全价混合料（TMR）饲喂奶牛基本条件.实践表明,运用JT-畜禽饲料配方优化程序设计（2-2版本）完全能预期达到快速计算奶牛全价混合料配方和每天风干饲料采食量的要求. 相似文献
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D. R. Charles 《British poultry science》1984,25(4)
Feeding Standards for Australian Livestock—Poultry. SCA Technical Report No. 12. Canberra 1983. The first report in a series of four prepared by the Working Party on the Introduction of Nationally Uniform Feeding Standards for Livestock, appointed by the Animal Production Committee for the Standing Committee on Agriculture. Edited by D. J. Farrell. ISSN 0 157‐4175. 相似文献
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作者结合饲养试验与呼吸测热,对275.7～478.7公斤体重的“西门塔尔×广东湛江黄牛”杂种肉牛生长育肥的能量代谢规律进行了研究,总结出其增重能量需要计算公式,为修定和增补我国《肉牛的饲养标准(试行)》提供了试验数据。 相似文献
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《The Journal of Applied Poultry Research》2009,18(2):244-251
The detrimental effects of physiological stress on broilers are well documented. However, little research exists to delineate the effects of different nutritional regimens on the stress response in broilers. Hence, an experiment was conducted to examine the effects of sucrose and supplemental water electrolytes on Ross 308 male broilers during corticosterone-induced stress, as well as the particle grind size during poststress recovery. Feeding broilers supplemental water electrolytes during corticosterone-induced stress resulted in improved live performance. Feeding water sucrose to stressed broilers did not result in live performance improvements during the stress period. However, broilers fed water-sucrose or water-electrolyte treatments during the stress period had improved feed conversion during stress recovery. Feeding broilers a diet with increased particle size during stress recovery had no effect on live performance. Carcass measurements were not affected by any treatment. Water-electrolyte or water-sucrose supplements appear to have some potential as stress amelioration agents and thus should be researched more thoroughly. 相似文献
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奶牛TMR饲养技术是现代奶牛场普遍采用的一项先进技术,是我国奶牛养殖业走向集约化、规模化、科学化、现代化的必由之路。近年来,奶牛TMR饲养技术在国际上得到了大力推广,取得了显著的成效。本文就奶牛TMR饲养技术的发展历程,推广该技术的必要性和可行性、优缺点、饲养技术要点以及采用该技术要注意的问题等方面进行了探讨,以期加快奶牛TMR饲养技术在我国的推广速度。 相似文献
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关于奶牛TMR饲养技术的探讨 总被引：1，自引：0，他引：1
TMR饲养技术是现代奶牛场普遍采用的一项先进技术，是我国奶牛养殖业走向集约化、规模化、科学化、现代化的必由之路。近年来，奶牛TMR饲养技术在国际上得到了大力推广，取得了显著的成效。本文就奶牛TMR饲养技术的优缺点、饲养技术要点以及采用该技术要注意的问题等方面进行了探讨，以期对TMR技术在中国的推广使用找到了一定的规律，从而加快奶牛TMR饲养技术在我国的推广。 相似文献
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2011年5～6月,对北京动物园1对圈养血雉进行了18 d、共90 h的行为观察。观察期间采用连续观察法在每天4个特定时间段,观察记录了10种4916次行为。这1对血雉在特定时间段内各行为时间分配规律为:雄鸟:警戒(28.17%)、进食(26.40%)、梳羽(15.64%)、行走(12.96%)、休息(2.50%)、沙浴(1.60%)、鸣叫(0.19%)、炫耀(0.04%)、其他(12.52%);雌鸟:进食(32.96%)、梳羽(20.05%)、行走(12.96%)、休息(7.00%)、进巢(5.71%)、沙浴(2.96%)、鸣叫(0.11%)、其他(21.17%)。雄鸟进食行为出现次数最多,警戒行为持续时间最长;雌鸟进食行为出现次数最多,且持续时间最长。繁殖期间雄鸟求偶炫耀行为有侧面型与正面型2种炫耀行为,侧面型炫耀行为也表示对领地占有:雌鸟有待交配行为;完整的交配过程有固定的模式,一般持续30～40 s。圈养下提供与栖息地近似的环境,有利于血雉表现出与野外相似的行为。 相似文献
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J. A. M. Botermans M. S. Hedemann M. S. rhede‐Winzell CH. Erlanson‐Albertsson J. Svendsen L. Evilevitch S. G. Pierzynowski 《Journal of animal physiology and animal nutrition》2000,83(1)
The effect of night feeding and feeding frequency on exocrine pancreatic secretion was studied in five chronically catherized growing pigs (16 to 31 kg). Feeding during the night (2200 to 2400 h) as compared to the day (1000 to 1200 h) tended to stimulate cholesterol ester lipase activity and tended to lower the colipase : lipase ratio in the pancreatic juice, but no effect on volume output, protein output and the activities of trypsin, chymotrypsin, amylase, lipase and colipase could be demonstrated. Feeding 12 small meals between 0800 and 2000 h as compared to one large meal (1000 to 1200 h) daily, altered the pattern of exocrine pancreatic secretion, tended to stimulate protein output by 44 %, chymotrypsin activity by 29 % and lipase activity by 46 %. These observations strengthened the theory that exocrine pancreatic secretion is partly regulated by feed intake per se and does not only depend on the amount of feed consumed. Feeding 12 small meals versus one large meal, compared at the same total daily feed intake, lowered the colipase : lipase ratio by 32 %. It can be concluded that feed intake pattern affected exocrine pancreatic secretion. 相似文献
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J R Deloach 《Veterinary parasitology》1984,16(1-2):117-125
An in vitro feeding test is described for Psoroptes ovis. The criterion for feeding response was established on the basis of coloration of mites by a red dye or by red blood cells. Feeding response was about 85% for female mites held off host cattle for 1 day. Mites preferred water plasma or serum and low-salt diets over whole blood. Feeding response was detected within 5 min of exposure to the diet, and maximum response was observed within 30 min of contact. Mites ingested an average 0.29 microliter of diet/100 mites in a single feeding. At temperatures between 10 degrees and 42 degrees C, feeding response was not significantly different. 相似文献
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【目的】本试验旨在研究肉鸡生长前期(1~21日龄)饲喂发酵饲料对其生长性能、养分利用率、肠道健康和肉品质的影响。【方法】选用1日龄爱拔益加肉鸡公鸡240只,随机分入4个处理组,每组6个重复,每个重复10只鸡。4组肉鸡生长前期(1~21日龄)分别饲喂添加0、5%、10%、15%发酵饲料的试验饲粮,生长后期(22~42日龄)均饲喂不含发酵料的基础饲粮,试验期为42 d。试验第21和42天时,测定肉鸡的1~21日龄、22~42日龄和1~42日龄生长性能、19~21日龄和40~42日龄养分利用率、42日龄肠道菌的数量和42日龄肉品质等指标。【结果】与对照组相比,饲喂10%发酵饲料显著降低肉鸡1~21日龄料重比(P＜0.05);饲喂15%发酵饲料显著提高肉鸡1~42日龄平均日增重和平均日采食量(P＜0.05),显著提高19~21日龄肉鸡干物质利用率和能量代谢率(P＜0.05)。前期饲喂发酵饲料对42日龄肉鸡的盲肠菌群数量影响不显著(P＞0.05)。与对照组相比,饲喂发酵饲料显著降低42日龄肉鸡肌肉中胆固醇含量(P＜0.05)。【结论】生长前期饲喂10%的发酵饲料显著降低了肉鸡1~21日龄料重比;饲喂15%发酵饲料显著提高了肉鸡1~42日龄平均日增重、平均日采食量及19~21日龄肉鸡干物质和能量利用率。生长前期饲喂发酵饲料显著降低了42日龄肉鸡肌肉胆固醇含量,但是对42日龄肉鸡盲肠菌群数量无显著影响。 相似文献
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1. The study investigated the feeding of a high oil and fibre diet containing 260 g/kg organically produced cold pressed sunflower cake or supplemental roughage to aviary-housed Lohmann Selected Leghorn (LSL) and Lohmann Brown (LB) layers between 20 and 74 weeks of age with outdoor access during summer. 2. Feeding roughage was associated with reduced vent injuries, a tendency to improve plumage condition, and was accompanied by improved FCR compared with controls. Feeding the high oil and fibre diet tended to improve FCR compared with the control diet. 3. The dry matter of faeces was reduced in both treatments compared with controls. Foot pad cleanliness and the proportion of dirty eggs were negatively affected by the high oil and fibre diet. Foot health was superior in LB compared to LSL. 4. LB used the outdoor hen-runs more than LSL, but LSL consumed more litter indoors. Fewer LB hens fed on the control feed were recorded in the outdoor hen-runs. Supplemental roughage tended to decrease litter consumption. 5. In conclusion, supplemental roughage reduced vent injuries and was correlated with foraging activities. Feeding 260 g/kg sunflower cake negatively affected hygiene in aviary hens. Sunflower cake is nevertheless a promising alternative feedstuff to fulfil the protein requirement in organic layers. 相似文献
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G.S. Butler 《African Zoology》2013,48(4):182-189
The daily feeding periodicity of Caffrogobius caffer was investigated at three sites in the eastern Cape. Two 24-h collections were taken at each collection site. Three methods were used to examine stomach contents. Relative stomach fullness was assessed for all six collections, while back-calculated time of ingestion and dry mass of the stomach contents as a percentage of dry somatic mass were applied to two collections each. The results from the three methods were similar. Feeding activity of C. caffer was not influenced by tide phase; peaks of feeding occurred during both high and low tide. Feeding occurred throughout the day with a tendency for slight crepuscular peaks of feeding activity. 相似文献
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仁寿县 (四川农区种草养畜生产发展的重点县 )种草养羊、养牛、养兔、养鹅、养猪发展变化很大 ,是耗粮型畜牧业向节粮型畜牧业转变的典型代表。要加强搞好草畜配套 ,以畜定草工作。大力发展牧草品种、数量和种植面积。 相似文献