Assessment of Negative Training on the Use of Cubicle Beds by Heifers

40 in-calf heifers were observed to examine the effect of timbers placing in passage area on their use of cubicle beds. Prior to the experiment preliminary observation was taken on these 40 heifers and they were divided into two even groups (cubicle user(or control) group versus cubicle refusal (or experimental) group by whether they properly used the cubicle beds or not. The timbers were placed in passage and feeding areas for the cubicle refusal group to force the animls to lie in the cubicle beds. The results of this experiment showed that feeding behaviour was unaffected by the presence of the timbers, but lying acitvity was about 8% higher for the experimental group, which led to a mean of almost 2 hours longer lying time over 24 h. After the timbers were removed, there was a significant decline in lying by the experimental group. The diurnal pattern of lying behaviour in cubicles indicated that the major effect on lying activity exerted by the presence of the timbers was seen during midnight to 10:00 a     

小麦禾缢管蚜种群动态的研究

本文采用平均密度（X），聚块性指标（m/m）和有蚜株率（F）对小麦禾缢管蚜种群动态进行模糊聚类分析。找出了其种群消长的4个时期：点片发生期，始盛期，猖獗期和衰退期；防治重点应在始盛期，即瓢虫卵期，以达到经济有效，充分保护利用天敌的目的。     

Myxozoans infecting the sharptooth catfish, Clarias gariepinus in the Okavango River and Delta, Botswana, including descriptions of two new species, Henneguya samochimensis sp. n. and Myxobolus gariepinus sp. n

During a recent investigation of parasites infecting fishes from the Okavango River and Delta, Botswana (southern Africa) fourteen sharptooth catfish, Clarias gariepinus (Burchell, 1822) (Siluriformes: Clariidae) were examined for the presence of myxozoan infections. Results revealed the presence of two species of the genus Henneguya Thélohan, 1895 and one species of the genus Myxobolus Bütschli, 1882 infecting this fish host. Two of the sampled fish exhibited large plasmodia of Henneguya suprabranchiae Landsberg, 1987 in the cartilage of the accessory breathing organ, another two individuals were infected with H. samochimensis sp. n. plasmodia in the gills and another three individuals revealed an infection with Myxobolus gariepinus sp. n. plasmodia in the ovaries.     

我国野生大豆与栽培大豆AFLP指纹图谱研究

 利用 Mse 和 Eco R 酶切 ,筛选了适宜大豆 AFL P指纹分析的引物组合 ,并利用 17对引物组合 ,建立了我国 92份代表性野生大豆和栽培大豆的 AFL P指纹图谱 ,分析了野生大豆与栽培大豆指纹图谱的特点与差别 ,发现了具有大豆种间特异性的带纹 M- CG/E- CGA- 4、M- CG/E- CGA- 12和 M- CGG/E- GGC- 14 ,并探讨了应用 AFL P指纹图谱鉴别野生大豆与栽培大豆种质的可行性     

猪场常见繁殖系统疾病的临床区别诊断

布氏杆菌病、细小病毒感染、猪繁殖与呼吸障碍综合征(PRRS)、猪瘟、猪伪狂犬病、猪乙型脑炎、猪附红细胞体病、衣原体、猪钩端螺旋体及饲料霉菌毒素中毒都共同出现流产症状,同时也有很多不同点。本文根据临床经验,将其归纳整理,系统地比较各病之间的不同点,为临床兽医正确区别诊断这类疾病提供宝贵的经验。     

Displacement imaging in porous media using the line scan NMR technique

Displacement imaging is a recent, powerful NMR method with which distributions of displacements can be acquired of e.g. fluids within a porous medium. Both motion parallel and perpendicular to the flow direction may be observed within a time window of a few milliseconds to several seconds. By combining displacement imaging with the line scan technique, one-dimensionally resolved measurements with a high temporal resolution ( < 1 min) of the spatial dependency of motion can be obtained. Here we present displacement images of flow through two simple model systems for soil: an unconsolidated glass bead water system and a sintered glass bead filter. It is demonstrated that the combination of displacement imaging and spatial resolution along a line is important to access both bulk displacement and local displacements in relation to the local porosity.