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传统的人工干清圈工艺由于高成本、低效率已难适应大型规模化猪场的技术工艺需求,水泡粪和机械干清圈工艺逐渐成为规模化猪场的主流清圈工艺.本文就规模化猪场机械干清粪与水泡粪工艺应用效果比较进行了简单的分析. 相似文献
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利用辘轳原理制作简易刮粪设备 总被引:1,自引:0,他引:1
利用辘轳原理制作简易刮粪设备石传林(山东省章丘市畜牧局章丘250200随着农村养鸡专业户不断向集约化,规模化方向发展,清粪已成为养鸡户最为头痛的问题。由于机械化自动清粪设备价格昂贵,一般养鸡户还难以接受。而采用蓄粪沟高床饲养,最后一次性清粪的办法,常... 相似文献
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奶牛场粪尿无害化处理技术 总被引:4,自引:1,他引:3
随着奶牛业的快速发展,各种类型的奶牛养殖小区不断涌现,数量越来越多。同时,奶牛场对环境的影响也引起各级政府和科学家的高度重视。牛场本身是一个大型的污染源,牛每天排泄出大量的粪尿,在生产过程中采用水冲式清粪、冲洗场地、牛身、机械和容器等造成大量污水排放,因此牛场的粪尿已对养殖小区 相似文献
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新型多层楼房式猪舍智能化机械清粪系统的设计 总被引:1,自引:0,他引:1
近年来,由于规模养殖业用地越来越紧张,多层楼房式猪舍逐渐被众多业主所接受。与多层楼房养猪相适应的清粪、环控、喂料等配套工艺技术是这一模式成功应用的关键。文章针对四层楼房式猪舍设计了一种楼房式猪舍自动化刮板清粪工艺,在大跨度小单元全进全出式猪舍,舍内一层每单元采用一拖二刮板清粪机将粪便从湿帘端刮入风机端主粪沟;二、三、四层采用刮粪机刮粪、收集粪便通过落粪管落入一层主粪沟;舍外主粪沟采用一拖一刮粪机清粪。整套工艺采用自动化智能化控制,该系统能够大幅度提高清粪效率,减少人工,节约用水,有效改善猪舍内环境,提高舍内猪群的健康水平,从而提高养殖场的总体效益。 相似文献
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本文叙述了养猪场环境治理的目标和措施,重点介绍了免洗猪舍和干清粪工艺。经过治理后,养猪场的环境将得以改善,逐步走上可持续发展的轨道。 相似文献
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蛋鸡场采用的清粪技术包括人工清粪、刮粪板清粪、传送带清粪等.本文通过现场调研不同地区不同规模的蛋鸡养殖场清粪技术,构建了层次分析法模型,从技术成熟度、技术应用效果、技术经济评价等方面对蛋鸡场清粪技术进行了效能评价.结果表明,蛋鸡场采用人工清粪、刮粪板清粪和传送带清粪技术效能得分分别为77.72、85.83和87.36,传送带清粪和刮粪板清粪技术的效能得分均显著高于人工清粪技术(P<0.05),传送带清粪技术效能与刮粪板清粪技术间无显著差异(P>0.05);随着蛋鸡存栏数的增加,传送带清粪技术的效能值增加,但不同规模未显著影响传送带清粪技术效能(P>0.05);年存栏20万~50万只商品蛋鸡的蛋鸡场,采用刮粪板清粪、传送带清粪和人工清粪技术时效能值分别为85.83、84.00和77.72,3种清粪技术间差异不显著(P>0.05).本研究可为不同规模和不同区域的蛋鸡场选用清粪技术时提供参考. 相似文献
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Evidence for the non-involvement of the uterus in the lifespan of the corpus luteum in the cyclic dog 总被引:1,自引:0,他引:1
Progesterone levels in peripheral blood of dogs were analysed during the cycle in which hysterectomy (n = 5) or sham surgery (n = 3) was performed as well as during the cycle of dogs (n = 5) hysterectomized at least one year prior to this study; the data were compared with the findings in control dogs (n = 3). The averages of the duration of the luteal period observed in the three experimental groups were not significantly different from those of control dogs. Immediately after surgery, the progesterone level decreased from 25 to 50% of the presurgical level, but returned to presurgical level in about four days. Prolactin levels were elevated for about 30 h after surgery. Nevertheless, the averages of the mean prolactin levels for each animal during the luteal period of the experimental groups were not significantly different from those of control dogs. It is concluded that in the dog, the uterus is not involved in the lifespan of the cyclic corpus luteum. 相似文献
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嗅源是军犬嗅觉作业训练的依据.军犬鉴别中嗅源能力的培养在整个鉴别训练中占有重要地位,关系到鉴别训练的成败和鉴别能力的提高.所以,军犬在嗅认嗅源时必须按照训犬员的指令充分、细致地感受嗅源气味,并且对嗅源气味产生兴奋反应.如何培养军犬充分嗅认嗅源以及及时解决嗅认过程中出现的问题,成为我们进行鉴别训练的关键.…… 相似文献
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Meschan EM Peham C Schobesberger H Licka TF 《Veterinary journal (London, England : 1997)》2007,173(3):578-584
As there is no statistical evidence that saddle fit influences the load exerted on a horse's back, this study was performed to assess the hypothesis that the width of the tree significantly alters the pressure distribution on the back beneath the saddle. Nineteen sound horses were ridden at walk and trot on a treadmill with three saddles differing only in tree width. Kinetic data were recorded by a sensor mat. A minimum of 14 motion cycles were used in each trial. The saddles were classified into four groups depending on fit. For each horse, the saddle with the lowest overall force (LOF) was determined. Saddles were classified as "too-narrow" if they were one size (2 cm) narrower than the LOF saddle, and "too-wide" if they were one size (2 cm) wider than the LOF saddle. Saddles two sizes wider than LOF saddles were classified as "very-wide". In the group of narrow saddles, the pressure in the caudal third (walk 0.63 N/cm(2)+/-0.10; trot 1.08 N/cm(2)+/-0.26) was significantly higher compared to the LOF saddles (walk 0.50 N/cm(2)+/-0.09; trot 0.86 N/cm(2)+/-0.28). In the middle transversal third, the pressure of the wide saddles (walk 0.73 N/cm(2)+/-0.06; trot 1.52 N/cm(2)+/-0.19) and very-wide saddles (walk 0.77 N/cm(2)+/-0.06; trot 1.57 N/cm(2)+/-0.19) was significantly higher compared to LOF saddles (walk 0.65 N/cm(2)+/-0.10/ 0.63 N/cm(2)+/-0.11; trot 1.33 N/cm(2)+/-0.22/1.27 N/cm(2)+/-0.20). This study demonstrates that the load under poorly fitting saddles is distributed over a smaller area than under properly fitting saddles, leading to potentially harmful pressures peaks. 相似文献
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Observations on the Pathology of the Spleen of the Cat 总被引:1,自引:0,他引:1
Abstract— Lesions were found in the spleen of four of sixty-three cats examined post mortem in the department, and comprised two examples of lymphosarcoma, one of chronic fibrinous peritonitis and one of subcapsular haematoma. Abnormalities were found in two cat spleens received from veterinary surgeons in general practice. In one cat the abnormalities were an haemangiosarcoma with secondary deposits in the liver and in the other extensive mast cell infiltration. In addition lesions were detected in the spleen of three of eighty-seven cats examined post mortem in general practice. The lesions were: multiple secondary deposits of adenocarcinoma from a primary tumour of the mammary gland, a ruptured spleen and a foreign body below the splenic capsule. Résumé— L'examen microscopique de soixante-trois chats pratiqué dans le service a permis de rencontrer quatre fois des lésions de la rate, dont deux lymphosarcomes, une péritonite capsulaire fibrineuse et un hématome sous-capsulaire. D'autre part des lésions ont été trouvées dans deux rates de chat expédiées par des vétérinaires exerçant en pratiaue générale. Chez un chat il s'agissait d'un htmangiosarcome avec métastases hépatiques et chex l'autre d'une infilt ation diffuse par des mastocyta. De plus, on a rencontré des llésions dnas la rate de trois chats parmi quatre-vingt sept autopsies effectuées dans le cadre d'une clientèle génárale. Ces iésions étaient dés métastases multiples d'un adénocarcinome dont la tumeur primitive siègeait dam la glande mammaire, une rupture de la rate et un corps érangers sou capsulaire. Zusammenfassung— Läsionen der Milz wurden bei vier von dreiuiidsechzig in dieser hbteilung sezierten Katzen gefunden, und zwar in zwei Fällen ein Lymphosarkom, in einem Falle eine chron-ische fibrinöse Peritonitis und in einem ein subkapsuläres Hématom. Anomalien fanden sich auch in der Milz von zwei Katzen, die aus der tierxrztlichen Praxis eingesandt wurden. Bei der einen Katze war dies ein Hämangiosarkom mit Metastasen in der Leber, bei der anderen eine weitläufige Infiltration der Mastzellen. Außerdem wurden bei drei von siebenundachtzig in der Praxis sezierten Katzen Milzläsionen gefunden. Diese bestanden am multiplen Metastasen eines Adenokarzinoms der Brustdrüse, einer Milzzerreissung und einem Fremdkörper unterhalb der Milzkapsel. 相似文献