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2005年我国赖氨酸市场主要表现为:生产商异军突起,产品大同小异,产量井喷增长,需求平稳增加,价格今非昔比,利润一落千丈,中国赖氨酸价格已成为国际市场风向标。 相似文献
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Intramammary infusion of an Enterococcus faecium SF68 preparation promoted the involution of drying off Holstein cows partly related to neutrophil‐associated matrix metalloproteinase 9 
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下载免费PDF全文 Attapol Tiantong Hsing‐Yi Peng Shuen‐Ei Chen Piya Piamya Wen‐Bor Liu Ming‐Tsao Chen Chi Yu Hajime Nagahata Chai‐Ju Chang 《Animal Science Journal》2015,86(1):111-119
A problem for dairy cows following milk stasis is to cope with a high risk of intramammary infection and there is a need to initiate an extensive renewal of secretory modules in mammary glands so that milk production in next lactation may be optimized. We recently reported that ultrasonicated Enterococcus faecium SF68 (SF68) is compatible with cow mammary glands and an enhancer of innate immunity during the immediate post‐milk stasis period. The current study further examines the concomitant effect of ultrasonicated SF68 on mammary tissue remodeling. Four Holstein cows each received intramammary infusions of regular antibiotic dry‐cow formula (positive control) and two different doses of SF68 in different quarters. Analyses of individual quarter secretion samples showed faster neutrophil infiltration, earlier modifications in protein composition, including caseins and lactoferrins, as well as more prompt elevation of the specific unit of 92‐kDa matrix metalloproteinase 9 (MMP9) in SF68‐infused quarters compared to the positive controls. Intramammary infusion of ultrasonicated SF68 seems able to accelerate the regression of mammary synthetic capacity and potentiate the breakdown of glandular extracellular matrix, indicating a more efficient mammary gland involution. Correlation analyses imply that the ability of ultrasonicated SF68 to induce faster neutrophil chemotaxis and the associated MMP9 release is partly responsible. 相似文献
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基于VB 2005与Access 2003平台下的营造林核查系统开发 总被引：1，自引：0，他引：1
根据营造林核查工作的实际需要,阐述营造林核查系统设计的思路、功能,构建基于V isualBasic 2005与Access 2003平台的营造林核查系统。 相似文献
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随着农业机械自动导航技术的发展,农机导航监控终端技术已经成为农业机械自动导航技术的重要组成部分。为了满足农业信息化发展的需求,更好地管理控制农机自动导航系统,实现对农机自动导航系统的实时监控与农机作业的控制,开发了农机自动导航监控终端软件系统,可进行农机车辆的导航状态监控、农机具的操纵控制及系统的故障诊断等。通过对农田工作的特点与导航需求分析,采用VS2005开发环境,C++语言,开发基于Win CE嵌入式操作系统的农机车辆自动导航监控终端软件。软件程序的总体功能模块包括:人机交互界面显示、基于RS232的串口通讯模块、路径规划模块、文件读写模块及系统参数调节模块等,并制定导航监控终端与导航控制器之间的数据通讯协议。将该导航监控终端软件系统装在拖拉机上测试运行,结果表明:导航监控终端软件系统可长时间连续稳定的工作,有效实现了对农机车辆导航系统的操作与监控。 相似文献
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The harvested biomass of switchgrass (Panicum virgatum L.) is generally much lower than its potential; this may be due to several factors including not recovering all the biomass at harvest, weed competition, pests, disease and spatial variation of soil features. The objective of this research was to quantify the yield spatial variation of switchgrass and relate it to soil parameters, in a field of about 5 ha, in 2004 and 2005. Several thematic maps of soil parameters and biomass yield were produced using GIS and geostatistical methods. Soil parameters changed consistently within very short distances and biomass yield varied from 3 to more than 20 Mg ha−1. This remarkable variation indicates that the potential for increasing switchgrass productivity is a real prospect. Furthermore, spatial variation of yield showed similar patterns in the 2 years (r = 0.38**), and therefore a major influence of site characteristics on switchgrass yield can be assumed to occur. Significant correlations were found between biomass yield and soil N, P, moisture and pH as well as between soil parameters. Some soil parameters such as sand content showed patchy spatial distribution. Conversely, a reliable spatial dependence could not be identified for other parameters such as P. Further research is needed. 相似文献
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农业资源与环境信息具有数据种类繁多、分散面广、可控程度低等特点,利用现代信息技术构建农业资源环境要素数据库,对于农业综合开发、农业结构调整和农业生产管理等具有重要意义.该文以C#为编程语言,选取Microsoft SQL Server 2005为数据库管理系统,构建了西南季节性干旱区农业资源环境要素数据库.该数据库包含农业生产数据库、农业资源数据库、生态环境数据库3个子数据库,按照行政区划分为重庆、四川、云南、贵州、广西5部分.通过面向对象的编程语言,系统实现了用户登陆模块、数据编辑更新模块、数据检索模块、数据打印输出模块等多个数据库操作模块,形成了一套简单易用的用户操作界面.此外,该文还对数据库进行了安全设计,保证了整个数据库系统的安全性、完整性和稳定性. 相似文献