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<正>淮安市是江苏省规模最大的原蚕生产基地,年生产量已达35万张左右,承担了江苏省近15%的蚕种生产任务,在全省蚕种业占有相当重要的位置;原蚕生产也是淮安市蚕桑业的重要组成部分,其较高的经济效益带动了周边地区蚕农栽桑养蚕的积极性,提高了蚕农养蚕技术水平,为巩固、提高、发展淮安市蚕桑生产发挥了积极的作用。近几年来,淮安 相似文献
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淮安市是江苏省规模最大的原蚕生产基地,年生产量已达35万张左右,承担了江苏省近15%的蚕种生产任务,在全省蚕种业占有相当重要的位置。原蚕生产也是淮安市蚕桑业的重要组成部分,其较高的经济效益带动了周边地区蚕农栽桑养蚕的积极性,提高了蚕农养蚕技术水平,为巩固、提高、发展淮安市蚕桑生产发挥了积极的作用。近几年来,淮安市原蚕生产规模逐年扩大,蚕种质量稳步提升,但也出现了劳力紧张、原蚕点落实生产任务困难等新问题,给原蚕生产带来较大影响。本文就淮安市当前原蚕生产存在的问题、主要原因分析和发展对策进行了探讨,供同行商榷。1原… 相似文献
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重庆市现有蚕种生产单位18家，绝大多数是原蚕区收茧制种。有的生产单位原蚕区桑树基础、养蚕设施设备条件好，蚕农饲养水平高，且技术力量雄厚，有相应的技术人员下乡指导生产，能够生产出量多质优的种茧，保证生产蚕种的质量。而有的生产单位，技术人员少，设施设备条件落后，生产基础条件差，原种发到蚕农手中后，根本没有技术人员下乡指导蚕农，[第一段] 相似文献
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在原蚕点养蚕 ,收购种茧回本站制种 ,这是我站历年来采取的办法 ,由于过去对原蚕点的管理措施和养蚕技术要求不一 ,收购回来的种茧质量有好有坏 ,以致我们制出的蚕种的质量也参差不齐 ,很难保证蚕种的质量。针对这一问题 ,本科室制定出一系列规范原蚕点种桑养蚕的技术措施 ,来确保原蚕点蚕农养蚕获得高质量的蚕茧。实践证明 ,通过规范原蚕点的管理和统一技术措施 ,我科室今年制的蚕种产量和质量比过去明显的提高 ,请看表 1原蚕点实施规范前和规范后管理 ,蚕种生产成绩的对比。表 1 规范原蚕点管理前后的蚕茧及蚕种质量年份 张原种收茧量(公… 相似文献
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浅谈原蚕基地的建设与管理 总被引：1，自引：0，他引：1
原蚕基地建设在广西起始于上世纪80年代中后期,是依靠农村原有丝茧育基础进行种茧生产的一种新的生产模式。当前桑蚕一代杂交种生产中,采取原蚕基地饲养原蚕、蚕种场与蚕农签订合同收购种茧回场部制种这个模式已十分普遍,可以说原蚕基地是蚕种生产的第一车间。但由于农村蚕区环境条件复杂,原蚕户分散,蚕室、蚕具、桑园、饲养环境、农户养蚕技术水平等方面存在较大差异,各种技术措施难以统一落实到位,致使蚕病难以控制,特别是家蚕微粒子病不能得到有效防治, 相似文献
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<正> 随着我省蚕桑生产的迅速发展,蚕种的需求量不断增加,场内生产的蚕种和原蚕区收茧回场制的蚕种日趋供不应求,农村原蚕区就地制种已成为蚕种生产的重要途径。但就地制种中集体大呼隆形式,后期制种与地方村组和养蚕户的利益关系不大,因而操作粗放,公斤茧制种量低,经济效益差。因此原蚕区就地“组合制种”形式应运而生,这种形式利用集体房屋和部分蚕农的蚕室,几个蚕户组成一个制种组合,根据各户的种茧等级下达各小组制种指标,实行包干制种,超奖减赔。收茧后由种场、村、组和蚕农共同管理,养蚕户包干制种,后期经济责任明 相似文献
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原蚕生产的目的是生产蚕种,在提高蚕种质量的前提下,提高克蚁单产和公斤茧制种量是提高经济效益的需要.提高公斤茧制种量,应认真掌握养蚕制种各阶段的关键技术措施,提高原蚕造卵数,提高发蛾率和单蛾产卵量. 相似文献
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笔者曾就原蚕区蚕种生产的质量管理撰文发表于<蚕桑通报>1992年第2期.多年过去,我们所处的社会、经济、自然条件已发生较大的变化.由于蚕农经多年的蚕种生产实践,技术水平有了较大的提高,加之各场都派出技术骨干驻点指导,蚕种生产有其相对的稳定性.但由于原蚕区全年仅仅进行1～2期的蚕种生产,更多的蚕期从事丝茧育生产,且一年间多次重复养蚕,病原累积多,期间的管理工作将间接影响到原蚕生产的稳定性和持续性.因此,认为原蚕区除了生产技术管理以外,政策管理、组织管理也相当重要,特别是非蚕种生产期间的管理在一定程度上较之蚕种生产期间的管理更为重要. 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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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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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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