中国黄牛（OX）前肢脚部动脉的研究

对２４例成黄牛的前肢脚部动脉采用解剖，铸型和动脉造影等方法进行研究。结果：１。中国黄牛前脚部掌侧动脉主干为正中动脉，指掌侧第Ⅱ总动脉，在近指节骨远端指掌侧第Ⅲ总动脉分为第Ⅲ，Ⅳ指掌侧固有轴动脉，经远指节骨轴孔入骨质管。２．指掌侧第Ⅲ总动脉在掌骨远端分出拽第Ⅱ总动脉，在近指节骨远端指掌侧第Ⅲ总动脉，分出背侧支和掌侧支，后者分别与指掌侧第Ⅱ，Ⅳ总动脉吻合形居近指节深弓，在掌侧支稍下方，指掌侧第２，Ⅳ指     

反刍动物过瘤胃淀粉研究进展

过瘤胃淀粉是高产反刍动物葡萄糖的重要来源之一。本文阐述了过瘤胃淀粉在反刍动物营养中的作用,以及提高饲料过瘤胃淀粉比例的处理方法,并根据近年来的应用研究状况,提出了过瘤胃淀粉在应用中存在的问题及今后的研究方向。     

涝胁迫对豫楸1号4种砧木嫁接苗渗透调节物质的影响

通过对涝渍胁迫条件下豫楸1号4种砧木嫁接苗渗透调节物质（Pro、可溶性糖、可溶性蛋白）活性的测定,结果表明：在持续涝渍胁迫下,3种渗透调节物质的变化趋势基本一致,整体变化趋势为先上升后下降,只是峰值出现的时间有差异。     

Movement patterns of seaward migrating European eel (Anguilla anguilla) at a complex of riverine barriers: implications for conservation

River infrastructure such as weirs and hydropower stations commonly present migrating fish with multiple potential passage routes. Knowledge of the cues fish use to navigate such environments is required to protect migrants from hazardous areas and guide them towards safe passage; however, this is currently lacking for many species. Employing high‐resolution positioning telemetry, this study examined movements of downstream migrating adult European eel, Anguilla anguilla, as they encountered a complex of water control structures in one location on the River Stour, southern England. The distribution of eels across five potential routes of passage differed from that predicted based on proportion of discharge alone. Certain routes were consistently avoided, even when the majority of flow passed through them. Passage distribution was partially explained by avoidance in the vicinity of a floating debris boom. Movement paths were nonrandomly distributed across the forebay and eels moved predominantly within a zone 2–4 m from the channel walls. Understanding of avoidance and structure oriented movementation exhibited by eels will help advance effective guidance and downstream passage solutions for adults.     

How to characterize ‘good’ and ‘greening’ in the EU Common Agricultural Policy (CAP): the case of clay soils in the Netherlands

The change in the Common Agricultural Policy (CAP) of the European Union from product to producer support, including requirements for ‘good agricultural and environmental conditions’ and ‘greening’, is excellent. However, these requirements are now defined in rather general terms. Questions can be raised about suitable indicators, and there is a recognized need for effective management recommendations to support farmers in achieving the required ‘good’ conditions. These recommendations are bound to be quite different for different soils in different countries. A study of Dutch clay soils was based on a storyline describing current problems and management options for improvement, which were quantified using a soil–water–crop simulation model. Indicators were defined for agricultural conditions and suggestions made for the use of the model in a predictive mode to help farmers improve their soil management. Environmental conditions were judged by current environmental guidelines for water and air. When modelling, implicit assumptions that soils are homogeneous were shown to be unrealistic for these clay soils, requiring development of innovative methods and procedures, presenting a challenge for soil research.     

疏水缔合阳离子淀粉的合成研究

本研究以环己烷为连续相,Span 80/Tween 80为分散剂,采用氧化还原引发体系,通过反相悬浮聚合技术,合成疏水缔合阳离子淀粉接枝共聚物。研究了反应温度,引发剂用量,反应时间对接枝性能的影响及溶解性能。并用IR、X衍射对共聚物进行了表征。结果表明:采用氧化还原引发剂可使聚合反应低温快速进行,在m(St)∶m(AM)∶m(DMDACC)∶m(OA)为4∶7.4∶1.5∶0.6时,引发剂用量3.1 mmol/L,30℃反应3 h,单体转化率92.6%,接枝率53.8%,粘均相对分子质量(MV)3.26×106。     

无患子当年生砧苗嫁接育苗技术

采用正劈接、短枝腹接、斜劈接、舌接等不同嫁接方法对无患子实生苗即移即接、移后10 d嫁接、地苗嫁接育苗试验,探索提高无患子嫁接成活率的途径。结果表明,用正劈接方法对无患子实生苗即移即接其嫁接成活率高,此嫁接技术可以在无患子嫁接育苗生产中应用。