河西走廊足球场草坪适宜草种筛选及评价

通过1999—2003年对引种栽培的22个草坪草品种,从抗寒性、质地、密度、耐践踏及抗逆性等进行对比分析观察,筛选出适合河西走廊建植足球运动场草坪草品种11个。其中草地早熟禾Poa pratensis品种有：新哥来德(Nuglade)、纳苏(Nassau)、克利(Kerley)、亨特(Huntsville)、康派(Compact)、午夜(Midnight);苇状羊茅Festuca arundinacea品种有：凌志(Barlexas)、沸浪(Finelawn)、巴比松(Barbizon)、爱瑞(Arid)、维加斯(Vegas)。运用灰色关联度分析法对各草坪草的质量进行了综合评价,构建了在河西走廊地区种植足球场草坪的基础。     

西宁地区70种草坪草引种试验报告

连续3年以成坪期、质地、密度、颜色、耐旱性、越冬性、抗病性、青绿期、盖度等指标对9属70个品种的草坪草进行5级质量综合评价,从中筛选出适合西宁地区种植的草坪草种.其中,早熟禾属5个品种:Eclipse,Ram1,Glade,Wabash 和加拿大早熟禾;羊茅属6个品种:Pixie,Arid3,Houndog5,TripleA3,Watersaver和匍匐紫羊茅;黑麦草属2个品种:Dandy和Calypso2.     

西安市44个草坪草品种引种试验研究

为选择适合西安市城市绿化草坪草种,于2001—2003年在西安市进行了草坪草引种试验研究,其中包括黑麦草、羊茅、翦股颖、早熟禾属在内的44个品种。通过建立草坪草评价体系,观察了草坪草颜色、盖度、密度、均一性等4项指标,并筛选出适应性较好,品质相对优良的早熟禾,高羊茅等草坪草品种,以供西安市绿化建植草坪参考。     

高寒盐碱地区冷季型草坪草引种适应性研究

在高寒盐碱地区的张掖市，对早熟禾属，高羊茅属，黑麦草属的21个品种进行草坪年周期评价试验，评价结果表明，草地早熟禾可作为张掖市建坪用最主要的草种。草坪型高羊茅属草种虽然越冬率代（60％－75％），但返青后，分蘖能力强，能迅速侵占空间，可做永久性建坪用草种黑麦草虽然生长性能较好，但不能越冬，不能作为永久性建坪草种。     

新型草坪模拟践踏器的研制及暖季型草坪草耐践踏性评价

根据足球运动员不同运动状态对草坪造成的践踏强度不同,研制出一种新型草坪模拟践踏器。选择狗牙根属、雀稗属、结缕草属和蜈蚣草属共20份草坪草材料为研究对象,使用自主研发的新型草坪模拟践踏器进行耐践踏性初步评价。践踏处理后,通过观测草坪表观质量和生物量发现,结缕草属和蜈蚣草属草坪在盖度、颜色和地上生物量方面相对优于狗牙根属和雀稗属草坪。Tifgreen、SeaIsle、兰引Ⅲ号结缕草和华南假俭草优于同属其他品种,耐践踏性较好。普通狗牙根、Salam、青岛结缕草和三水假俭草在同属中耐践踏表现最差。上述8个品种中,仅有兰引Ⅲ号结缕草和青岛结缕草纤维素含量差异显著(P<0.05), 而木质素含量测定结果表明各属材料间差异不显著(P>0.05)。兰引Ⅲ号结缕草和华南假俭草细胞排列最为紧密,角质层厚度大且连续,泡状细胞数量多,木质化程度高,耐践踏性最强。普通狗牙根和Salam角质层薄或无角质层,维管束木质化程度较低,泡状细胞数量少,不耐践踏。主成分分析表明,草坪盖度、颜色和地下生物量可作为草种耐践踏性评价的重要指标。该研究为暖季型草坪草种的开发利用提供参考依据。     

天津盐碱地区冷季型草坪草的评价与筛选研究

通过对冷季型草坪草种6个属、11个种,122个品种进行的试验观察与评价,初步筛选出56个品种作为进一步观察试验和推广应用的优良草种。     

新型草坪模拟践踏器的研制及暖季型草坪草耐践踏性评价

根据足球运动员不同运动状态对草坪造成的践踏强度不同,研制出一种新型草坪模拟践踏器。选择狗牙根属、雀稗属、结缕草属和蜈蚣草属共20份草坪草材料为研究对象,使用自主研发的新型草坪模拟践踏器进行耐践踏性初步评价。践踏处理后,通过观测草坪表观质量和生物量发现,结缕草属和蜈蚣草属草坪在盖度、颜色和地上生物量方面相对优于狗牙根属和雀稗属草坪。Tifgreen、SeaIsle、兰引Ⅲ号结缕草和华南假俭草优于同属其他品种,耐践踏性较好。普通狗牙根、Salam、青岛结缕草和三水假俭草在同属中耐践踏表现最差。上述8个品种中,仅有兰引Ⅲ号结缕草和青岛结缕草纤维素含量差异显著(P0.05),而木质素含量测定结果表明各属材料间差异不显著(P0.05)。兰引Ⅲ号结缕草和华南假俭草细胞排列最为紧密,角质层厚度大且连续,泡状细胞数量多,木质化程度高,耐践踏性最强。普通狗牙根和Salam角质层薄或无角质层,维管束木质化程度较低,泡状细胞数量少,不耐践踏。主成分分析表明,草坪盖度、颜色和地下生物量可作为草种耐践踏性评价的重要指标。该研究为暖季型草坪草种的开发利用提供参考依据。     

天津盐碱地区冷季型草坪草的评价与筛选研究

通过对冷季型草坪草种6个属、11个种,122个品种进行的试验观察与评价,初步筛选出56个品种作为进一步观察试验和推广应用的优良草种.     

13个冷季型草坪草品种在蚌埠地区的适应性研究

在引进的13个冷季型草坪草品种试验中,通过对其表观质量评价和几个生理指标测定。结果表明：13个冷季型草坪草品种的质地、分蘖密度、 均一性、盖度、叶色等方面存在一定差异。在表观质量方面：高羊茅属Festuca的羊茅极品、猎狗五号、自豪、千年盛世、家园品种表现较好;黑麦草属Lolium的黑麦王子、绅士春季生长较好,越夏表现较差;而早熟禾属Poa的草坪之星、午夜、超级伊克利、爱沃得、优异、新哥来得品种春季生长和越夏表现皆较差。就测定的生理指标而言,猎狗五号、自豪、千年盛世、黑麦王子、绅士、爱沃得品种根系活力、叶绿素、可溶性糖含量及脯氨酸含量等较高,丙二醛含量相对较低。综合表观质量和生理指标分析：高羊茅属的自豪、千年盛世、家园、猎狗五号4个品种适应性最强;黑麦草属的2个品种在春季适应性较强,但越夏期间与春季相比,适应性较差;早熟禾属的6个品种无论在春季和夏季的适应性一般。     

狗牙根和结缕草草坪的模拟践踏与磨损拟合分析

草坪耐践踏试验一般采用大型模拟践踏器或小型模拟磨损器进行处理，但二者对草坪造成的损伤程度差别很大，难以直接进行比较。本试验对狗牙根属(Cynodon)和结缕草属(Zoysia)的4个草坪草进行不同强度的磨损器处理与中等强度的践踏器处理，通过表观质量指标变化综合评价草坪耐磨损性和耐践踏性。结果表明，3种强度磨损处理条件下，随着处理时间的增加，4个草坪草的表观质量指标持续下降，践踏处理下草坪草表观质量指标下降幅度更大；4个草坪草经过加权综合评价，其耐践踏性从强到弱排序为：'兰引Ⅲ号’结缕草>'Tifgreen’杂交狗牙根> '青岛’结缕草>普通狗牙根；通过拟合分析发现，草坪的耐践踏性越强，其模拟践踏器与磨损器处理之间的拟合点出现的时间则越晚。试验结果可为草坪草耐践踏品种选育以及小型磨损器与大型践踏器结合用于耐践踏试验研究提供数据支撑和技术参考。     

国内生态恢复研究进展

本文介绍了生态恢复的研究进展,从生态恢复的定义、退化生态系统的指标等方面进行阐述,重点对国内在恢复生态学方面的进展做了介绍.对当前的人工草地、草地农业的研究情况做了一些概述.     

国内生态恢复研究进展

本文介绍了生态恢复的研究进展,从生态恢复的定义、退化生态系统的指标等方面进行阐述,重点对国内在恢复生态学方面的进展做了介绍。对当前的人工草地、草地农业的研究情况做了一些概述。     

Veterinary pathology in Europe in the light of the congresses of the European Society of Veterinary Pathology in the last decade

This paper presents the main trends in the activity of European veterinary pathologists in the context of their oral presentations (plenary lectures and short presentations) and posters provided during annual meetings of the European Society of Veterinary Pathology (ESVP), in the decade 1997-2006. It was found that the issue that was most often brought up in the meetings was organ pathology (566 presentations). Infectious and parasitical diseases were only slightly less frequent (548 presentations). Oncology was another common issue (404 presentations). During this decade, 52 plenary lectures were presented, 765 oral presentations and 1 072 posters. Altogether, 1 889 presentations were made, which is between 127 and 238 per year. Research by Polish scientists accounted for 3.16% of all presentations. Additionally, the subject matter discussed at the annual meetings is analysed, and the trends in the development of veterinary diagnostic pathology and broad pathology education are indicated. It is shown that veterinary pathology enhances knowledge in the field of veterinary medicine by fulfilling a cognitive and diagnostic role.     

Application of the log-linear model in the prediction of the antinuclear antibody test in the dog

To find possible associations between antinuclear antibody (ANA) pattern, ANA titer, and certain clinical changes and clinical laboratory test results in dogs, the veterinary medical records of 111 ANA-positive and 126 ANA-negative dogs were examined. Variables could not be found that had significant associations with ANA pattern (unlike the results in persons), because of the predominance of 2 patterns. A log-linear model for ANA titer adequately fit the observed frequency and included 2-way interactions between titer and polyarthritis, titer and hematologic disorders, and polyarthritis and lymphadenopathy.     

Evidence for the non-involvement of the uterus in the lifespan of the corpus luteum in the cyclic dog

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.     

Disturbance in the growth of the radius in dogs

In a 4-year period nine dogs have been met in which there was incomplete growth of the radius. The condition was unilateral in eight dogs and bilateral in one. Two were littermates. The defect is due to premature cessation of growth of the distal growth plate of the radius but the cause of this is not precisely known. It is recognized by characteristic radiographic changes in radius length, elbow joint space and premature closure of the distal growth plate of the radius. A method of surgical treatment has been devised and has proved beneficial in five dogs. Zusammenfassung. In einer Vierjahresperiode wurden neun Hunde beobachtet, bei denen ein unvollständiges Wachstum des Radius vorlag. Bei acht Hunden war der Zustand nur auf einer Seite zu finden, bei einem Hund auf beiden Seiten. Zwei der Hunde gehörten zum gleichen Wurf. Der Mangel ist auf verfrühte Wachstumseinstellung der distalen Wachstumsplatte des Radius zurückzuführen, jedoch ist die Ursache davon nicht genau bekannt. Er wird an charakteristischen radiographischen Veränderungen der Radiuslänge, des Ellbogengelenkzwischenraums und vorzeitigem Abschluss der distalen Wachstumsplatte des Radius erkannt. Es wurde eine chirurgische Behandlungsmethode entwickelt, die sich bei fünf Hunden als nutzlich erwies. Résumé. Au cows d'une période de 4 ans on a observé 9 cas de croissance incomplète du radius chez des chiens; l'anomalie était unilatérale dans 8 cas et bilatérale dans un cas; deux chiens appartenaient à la même portée. L'anomalie est due à l'arrêt prématuré de croissance de la plaque de croissance distale du radius, mais la cause n'en est pas encore connue d'une manière précise. Le diagnostic se fait par les signes radiologiques caractéristiques, modifications de la longueur du radius, de l'articulation du coude et soudure prématurée de la plaque de croissance du radius. On a élaboré une méthode de traitement chirurgical, qui s'est montrée favorable chez 5 chiens.     

Modelling the transmission of Echinococcus granulosus in dogs in the northwest and in the southwest of Morocco

Echinococcus granulosus (E. granulosus) infection was studied in 151 dogs in two regions of Morocco: 68 dogs in the northwest (Loukkos) and 83 dogs in the southwest (Tiznit). The mean prevalence rates of echinococcosis in dogs were 58.82% (46.23-70.63%) in Loukkos and 55.42% (44.10-66.34%) in Tiznit and the mean abundances of E. granulosus per dog were 75 (59-93) and 547 (504-595), respectively. The mean abundance of E. granulosus in dogs was fitted to a negative binomial distribution by the maximum likelihood techniques to define parameters. E. granulosus was aggregated in dogs in the two regions. The prevalence of infection and the abundance of E. granulosus in dogs were fitted to mathematical models in order to determine if the parasite population is partly regulated by definitive host immunity. The best fit was obtained with the models assuming the presence of immunity. The mean time of exposure to infection was similar in the two regions and ranged from 8 months to about 2 years. The infection pressures (number of E. granulosus) obtained per dog each year were 65 (8-294) in Loukkos and 476 (316-886) in Tiznit. The proportion of dogs susceptible to infection was still high along the life of the dogs in Loukkos, while it was not different from zero in old dogs of Tiznit.