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10个紫花苜蓿品种的生产性能及抗性分析研究 总被引：3，自引：1，他引：3
研究了10个紫花苜蓿品种在昆明地区的主要生产性能及抗逆性。结果表明:GT13R紫花苜蓿、射手2号紫花苜蓿和路宝紫花苜蓿在生产性能、营养价值和抗性方面都优于其他供试品种,适宜在昆明地区大面积推广种植。 相似文献
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引进5个紫花苜蓿品种在德令哈地区进行适应性试验,通过对生育期、鲜草产量、抗逆性等指标进行比较,结果表明:引进的5个紫花苜蓿品种越冬率在70%以上,生产性能较好,可供生产推广应用. 相似文献
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柴达木盆地德令哈地区紫花苜蓿品种比较试验 总被引：1，自引：0，他引：1
引进紫花苜蓿5个品种在德令哈地区进行适应性试验,通过对生育期、鲜草产量、抗逆性等指标进行比较,结果表明:引进的紫花苜蓿5个品种越冬率为70%以上,生产性能较好,可供生产推广应用. 相似文献
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研究了干旱寒冷地区3个紫花苜蓿品种在旱作条件下的生长发育及生产性能。结果表明,3个紫花苜蓿品种均能正常生长发育,生产性能良好,可以进行推广种植。 相似文献
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10个引进紫花苜蓿品种生产性能及持久性比较 总被引：3，自引：0，他引：3
以国外引进的10个紫花苜蓿（Medicago sativa）品种为试验材料,通过对其产草量及营养品质进行测定,探讨引进紫花苜蓿品种在昆明地区的生产性能和持久性,为我国南方地区紫花苜蓿的引种栽培提供参考。结果表明,1）生长第2年、第6年,10个引进紫花苜蓿品种的产草量、株高、叶茎比、粗蛋白、粗脂肪、粗灰分含量以GT13R、射手2号显著高于其他品种,而粗纤维（CF）含量显著低于其他品种（P＜0.05）;2）随着生长年限由第2年延长至第6年,10个引进紫花苜蓿品种的生产性能和营养品质均呈下降趋势,以品种爱林+2和超级13R下降最为显著;3）灰色关联综合评价结果表明,品种GT13R和射手2号生产性能和持久性最好,是最适宜在昆明地区种植的品种;品种射手、爱博、爱林+2和超级13R的生产性能和持久性较差,不适宜在云南省北亚热带气候条件建植多年生栽培草地。 相似文献
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旱作条件下紫花苜蓿3个品种生产性能试验 总被引：2，自引：0，他引：2
研究了干旱寒冷地区3个紫花苜蓿品种在旱作条件下的生长发育及生产性能。结果表明，3个紫花苜蓿品种均能正常生长发育，生产性能良好，可以进行推广种植。 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