天津地区道路绿化中的植物配置结构与树种的选择

道路绿化是城市绿化系统中的重要组成部分,具有组织交通、美化市容、改善小气候等功能,通过对道路绿地植物配置结构和树种的研究,探讨绿地结构模式,使城市道路绿化不断完善。     

咸宁职业技术学院扩建区园林植物配置初探

在分析咸宁职业技术学院所处的自然地理条件、地域文化和学校特色的前提下,探讨校园园林植物配置的原则与方法,介绍了该校扩建区的园林植物配置。     

观赏蔬菜在园林配置造景中的应用

观赏蔬菜是指一类集食用、观赏、绿化、美化功能于一体的有明确内涵的花卉新类别。它以形态美、色彩美在现代园林绿化中发挥着越来越重要的作用。作者在介绍观赏蔬菜分类的基础上,重点评述了观赏蔬菜在园林配置造景中的应用,并在分析其中存在问题的基础上提出了合理建议,为观赏蔬菜更好地应用在园林设计中提供参考。     

黄河流域农业水资源优化配置

黄河流域水资源供需矛盾日趋尖锐，本文围绕水资源最优利用问题，对黄河流域水资源配置原则，农业水资源在地区之间、作物之间以及作物不同生育阶段之间的合理配置进行了分析、探讨。     

浅谈彩叶植物在城市园林植物配置中的应用

文章介绍了彩叶植物在城市园林植物配置中的作用和配置原则以及在城市园林中的应用与前景。     

玉林市城区道路绿化树种调查及配置模式研究

以玉林市城区道路绿化建设的必要性为出发点,以打造玉林市＂城在林中,路在绿中,房在园中,人在景中＂的绿化格局为目标,通过对城区道路绿化树种生活型、主要观赏特性、生长状况、配置方式等方面进行系统调查及筛选,结合玉林的发展规模和道路绿化状况,探索出对玉林市绿化树种选择及配置的合理对策,以期为广西乃至全国的城市道路绿化提供科学依据。     

杭州市屋顶花园植物的选择与配置研究

对杭州屋顶花园植物的选择和配置进行了调查,并结合杭州2处屋顶花园案例进行了分析,最后总结了杭州市屋顶花园植物选择和配置的特点。     

Combined subcutaneous administration of ivermectin and nitroxynil in sheep: Age/body weight related changes to the kinetic disposition of both compounds

The effect of age/body weight in the plasma disposition kinetics of ivermectin (IVM) and nitroxynil (NTX) after their co-administration as a combined formulation to sheep was studied. Sixteen (16) male sheep were allocated into two experimental groups (n = 8 each): (a) high body weight (high bw) (18-20 months old), and (b) low body weight (low bw) (6-8 months old). Animals in both groups were subcutaneously (sc) treated with IVM (200 μg/kg) and NTX (10 mg/kg) using a commercially available combined formulation (Nitromectin^®, Lab. Ovejero, Spain). Blood samples were taken by jugular venopuncture before (time 0), at 2, 4, 8, 12 h and at 1, 2, 3, 5, 7, 10, 15, 20, 25, 35, 40, 50 and 60 days after administration. Recovered plasma was analysed to quantify IVM and NTX by HPLC. Higher IVM plasma concentrations were measured until 20 days post-administration in “low bw” compared to “high bw” animals, where IVM was recovered up to 35 days post-treatment. The IVM absorption process greatly differed between experimental groups. A significantly higher (p < 0.01) C_max (36.7 ± 7.52 ng/ml) value was obtained at a delayed (p < 0.05) T_max (48.0 ± 0.0 h) in light compared to heavy (C_max: 8.0 ± 0.80 ng/ml; at 34.0 h) body weight sheep. IVM elimination half-life and mean residence time were significantly shorter in light compared to heavy (older) sheep. NTX mean plasma concentrations were lower in “low bw” compared to those measured in “high bw” sheep, with elimination phases declining up to 60 d post-administration in both experimental groups. The NTX AUC value in “low bw” (1188.5 ± 122.6 μg day/ml) was significantly lower (p < 0.05) than that obtained in the “high bw” (oldest) animals (1735.0 ± 155.8 μg day/ml). Shorter NTX elimination half-life and mean residence time (p < 0.01) were obtained in the youngest (“low bw”) compared to the oldest (high bw) sheep. The work reported here assessed for the first time the disposition of IVM and NTX after their combinated injection to sheep, demonstrating that animal body weight/development greatly affects the kinetic behaviour of both anthelmintic drugs.     

农业科研单位科研副产品处置路径探讨

以江苏省农业科学院为例,介绍了当前农业科研单位科研副产品管理的现状,剖析了科研副产品处置中存在的问题,探索了科研副产品处置的有效途径,提出了加强科研副产品处置管理的对策。     

麦-棉-辣-米立体组合种植模式及效益探析

试验研究证明,麦-棉-辣-米立体种植模式采用优化田间结构配置及配套技术措施,农田生态位、作物边际效应及病虫生态控制效应显著,与麦棉、麦辣间套及麦米轮作种植模式相比,其产值分别提高34.1％、27.5％和94.0％,纯收入分别增加8188元/hm~2、6090.5元/hm~2和12066元/hm~2。