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通过对通渭县的自然地理状况以及草产业发展现状进行调查和分析,提出发展草产业是通渭县农业发展的第一要务,是通渭县农业经济结构内部调整的必然所在。对草产业发展中存在的问题提出了科学决策,即可持续发展是通渭县农业和草产业发展的关键。此外,对草产业发展的指导思想和原则、发展中应采取的措施等方面进行了必要性、可行性分析论证。 相似文献
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基于CNKI数据库的我国草产业研究的可视化分析 总被引:1,自引:0,他引:1
《中国草食动物科学》2020,(1)
为把握近二十年我国草产业研究的演进路径、研究热点及前沿,通过CNKI数据库检索出2000—2018年我国草产业研究相关文献,借助CNKI自身的"计量可视化分析"和Cite Space软件进行文献数量分析及图谱绘制。结果共检出872篇有效文献,相关文献最早发表于1986年,年度发文数量整体呈上升趋势;畜牧业、草产品和沙产业是与草产业相关性较强的主题,高频关键词为"草产业""对策""现状",当前2个较为明显的研究热点分别为草产业的经济效益研究和草产业的生态效益研究。在1999—2004年间,草产业研究较为活跃,2014—2018年间,草产业领域进入高度活跃期,草产业的发展与国家大政方针之间有密切关系。 相似文献
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如何从农牧业结构调整人手,实现农牧业增产增效是当前发展现代畜牧业亟需解决的问题.互助县大多数地区具有发展草产业的资源优势,特别是近几年该县燕麦、苜蓿、豌豆等牧草品种的推广利用,带动了草产业的蓬勃发展,发展草产业已逐步成为全县农牧民增收的又一条重要途径,草产业势必会成为互助县经济结构调整的重点. 相似文献
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岷县地处秦岭、黄土高原和青藏高原的交汇带。本研究通过分析其草产业现状,指出岷县草产业发展主要存在天然草地退化严重、栽培草地管理粗放和特色草产业加工技术不完善的问题,提出岷县草产业今后发展的方向是分区管理和分类经营,从建立草地生态补偿基金、发展草地观光旅游业、提高栽培草地生产力、提高草地资源的利用效率和培训农民能手等方面提出了岷县草产业的发展策略。 相似文献
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平安县具有发展草产业的光、热、土资源优势和地域优势。发展草产业是农民增收的一条重要途径,是农区经济结构调整的重点。笔者通过对全县草产业发展状况进行调查研究,针对存在的一些问题提出对策和建议。 相似文献
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草产业是现代农牧业产业体系的重要组成部分,是海北州经济社会发展的重要基础产业。大力发展草产业,对保护天然草原生态,促进农牧业结构优化升级,增加农牧民收入具有重要意义。草产业不仅是经济型产业,更是生态型产业,是推进资源节约型、环境友好型社会建设的重要基础。只有大力发展草产业,推进草产业与现代农牧业的深度融合,才能促进农牧业结构优化升级,才能实现天然草场生态良性循环,才能实现现代农牧业的可持续发展。 相似文献
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如何从农牧业结构调整入手,实现农牧业增产增效是当前发展现代畜牧业亟需解决的问题。互助县大多数地区具有发展草产业的资源优势,特别是近几年该县燕麦、苜蓿、豌豆等牧草品种的推广利用,带动了草产业的蓬勃发展,发展草产业已逐步成为全县农牧民增收的又一条重要途径,草产业势必会成为互助县经济结构调整的重点。 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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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