共查询到20条相似文献,搜索用时 62 毫秒
1.
养蜂要做好人工分蜂和蜜蜂的合并工作.怎样做好?笔者谈谈个人的一些做法,供蜂友们参考. 1人工分蜂 人工分蜂又称人工分群,它是增加蜂群数量,扩大生产的基本方法,用培育的产卵蜂王、成熟王台或者储备蜂王以及一部分带蜂子脾或蜜睥组成新蜂群.人工分蜂能按计划,在最适宜的时期繁殖新蜂群.个别蜂群发生"分蜂热"时,可以及时采取人工分蜂的方法把蜂群分开,能够制止蜂群发生自然分蜂,避免收捕的麻烦和分蜂群飞逃的损失. 相似文献
2.
3.
4.
5.
快速解除分蜂热的三种方法 总被引:1,自引:0,他引:1
养强群夺高产是每个养蜂者期盼的事 ,但蜂群养得强壮了 ,如管理措施不当 ,也容易产生分蜂热 ,一旦产生了分蜂热 ,就会影响花期蜂群获得高产。如何快速解除分蜂热 ,使蜜蜂极积投入到采集中去呢 ?下面谈谈三种简易办法 ,供同行们参考。方法一 :把产生分蜂热蜂群内的王台除净 ,在蜜蜂大量活动时和一弱群直接调换位置 ,这样一来蜂群的内环境发生改变 ,而弱群内虫卵较多 ,蜂王产卵积极 ,解决了老子过多 ,哺育蜂过剩的问题 ,分蜂意念马上就可解除。方法二 :将分蜂群的蜂王带两框将要出房的老子一并提出 ,让蜂王休息备用 ,过 2日待蜜蜂知晓失王后 ,… 相似文献
6.
中蜂有喜分蜂的习性,各地也都摸索出很多控制中蜂分蜂的方法,現把我在四川屏山县用的控制中蜂分蜂热的方法簡介如下: 一、人工分蜂法在流蜜期以前,当蜂群发生分蜂热的时候,用臥式箱将蜜蜂和子脾均分成两区。在有王群的一区,把王台清除掉,将卵、虫脾放在蜜蜂 相似文献
7.
在春季控制中蜂发生分蜂热,是加快蜂群繁殖壮大群势,提高产蜜量的关键。近年来,我们对中蜂发生分蜂热的主要原因初步进行了分析和研究,认为要控制中蜂发生分蜂热,就必须在蜂群未发生分蜂情绪之前,在蜂群管理工作上加以组织,区别对待,才能收到较好的效果。现将控制中蜂分蜂热的蜂群组织方法介绍如下。 相似文献
8.
9.
10.
<正>每年的春末夏初蜂王和一部分蜜蜂飞离蜂群,另建蜂巢组成新蜂群,将原巢留给即将羽化的新蜂王,一群分为两群,这就是蜂群的自然分蜂。自然分蜂是蜜蜂繁衍的本能,蜜蜂靠分蜂来实现蜂群数量的增加,有效补偿由于病害、敌害、饥饿等原因造成的蜂群损失。但自然分蜂会给蜂群繁殖和养蜂生产带来损失,在养蜂生产中要及时采取有效措施控制自然分蜂的发生。一、自然分蜂产生的原因 相似文献
11.
12.
13.
魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
14.
本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
15.
16.
以国际标准强毒R株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离MG,并收集感染鸡所产蛋分离MG。结果表明,人工感染48小时后上、下呼吸道及肺已被全面感染,96小时气囊已被感染,120小时输卵管已能分离到MG,卵巢始终分离不到MG。人工感染鸡自144小时便能在其所产蛋中分离出MG。药物治疗能在72小时内消除感染,油乳剂苗则需24天后逐渐降低蛋内MG分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内MG,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
17.
REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
18.
19.
20.
Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献