Farmers' Attitudes to the Benefits and Barriers of Adopting Automation for Surface Irrigation on Dairy Farms in Australia

The study reports farmers' attitudes andperceptions towards the ``barriers' and ``benefits' of automaticirrigation systems. Factor analysis was used to identify perceived ``barriers' and ``benefits' andthe impact of these on farmers' priority to adopt automation wasexamined. Results suggest that farmers'attitudes, particularly with respect to ``cost' and``lifestyle' influenced the priority given to adopting automaticirrigation systems. The area under pasturecultivation was also an importantdeterminant in the farmers' priority foradopting automatic irrigation systems.     

山东省推广小麦品种面团品质性状及聚类分析

对山东省近年推广种植的24个小麦品种的面团品质性状,包括粉质仪参数和泊尔辛克值等,进行了系统测定和聚类分析。为山东省有计划地进行小麦品质改良提供信息和依据。     

集对分析法在区域雨水资源开发利用潜力综合评价中的应用

探讨了区域雨水资源开发利用潜力的综合评价方法,并将集对分析理论应用于该研究,建立了区域雨水资源开发利用潜力综合评价模型。实例分析表明,该方法用于评价区域雨水资源开发利用潜力,方法简单,评价结果符合实际情况。     

Waxy durum acts as a unique form of crumb softener in bread

Flour milled from waxy durum grain was incorporated into bread formulations and its effects on crumb softness and loaf volume compared to those of added fats and emulsifiers. Waxy durum had a small effect on increasing loaf volume, and little of this effect could be explained by dough height or oven spring; effects of most other additives were closely related to dough height or oven spring. For all additives, the relationship between crumb softness and loaf volume fitted a power law relationship. Waxy durum and some of the additives had a greater softening effect than predicted from their effect on volume while others produced a much firmer crumb. With only one exception, when combined with other additives waxy durum reduced compression of the crumb more than predicted on the basis of the effects on loaf volume of the additives alone. In common with some of the added lipids, during compression analysis, crumb prepared with waxy durum flour had similar levels of structural damage as crumb baked from the standard formulation; other lipids and emulsifiers produced more fragile crumb. Waxy durum flour appears to have unique effects on crumb softness.     

基于SRAP分子标记的11份柑橘种质材料遗传多样性分析

为分析11份柑橘种质材料的遗传多样性,本研究以7份沙糖橘种质以及4份其他柑橘种质为试验材料,利用SRAP分子标记进行分析,并用UPGMA法进行聚类.结果表明:160对引物组合筛选出20对引物组合扩增条带清晰,11份种质材料两两之间遗传相似系数在0.322 1～0.931 6之间.沙糖橘和金葵蜜橘间的遗传相似系数最大,为...     

基于SWOT分析的山东省农业旅游研究

采用SWOT分析法分析山东省农业旅游发展中的优势、劣势、机会和威胁,并提出了山东省发展农业旅游的对策和措施。     

龙羊峡库区天然草地动态分析

利用美国陆地卫星T.M图象,对龙羊峡水库库区的天然草地进行了对比分析。结果表明,天然草地面积减少7084.09hm^2。其中减幅较大的为温性草原类和温性荒漠类,10年中分别减少了7299.27hm^2和1015.65hm^2。另外,草地盖度,牧草高度和草地产量也有下降,其中草地盖度下降5%-15%;牧草种数减少4-20种;牧草产量下降73.5-1090.05kg/hm^2。并对变化原因作了分析,提出了治理措施。     

新柴牌中大功率农机动力的开发

在N,D,K等3个系列产品平台上整合开发了18.4～58.8kW中大功率农机动力,目的是有一个相对较宽的产品链来配套中大功率拖拉机及相应功率要求的联合收割机。其产品开发的重点:一是功率谱完整,即通过缸径冲程的组合设计,力求在同一条生产线上制造不同功率的产品;二是同系列同缸心距扩排量带来的结构可靠性开发,主要是缸套-活塞环的可靠性开发及曲轴与轴承的可靠性开发,满足农用动力特殊工况和工作环境的可靠性开发;三是满足国内非道路移动机械二阶段排放要求的性能开发,特别是PM,NOx和燃油消耗之间的折中,重点是在经济成本的条件下对燃烧系统和燃油系统的优化开发。     

一种新型集蔗器的结构设计及其有限元分析

集蔗器是甘蔗收割机中用来收集甘蔗的装置。通过总结前人所设计的集蔗器的优缺点,提出了一种新型集蔗机构—挡板式斜集集蔗器,并进行了结构设计、参数计算和三维建模;最后,为了验证所设计的集蔗器转轴的尺寸的合理性,通过有限元分析了软件ANSYS分析它在受外力情况下的变形情况和整体的应力分布情况。