A Computer Program for Automatic Watering Based on Potential Evapotranspiration by Penman Method and Predicted Leaf Area in Miniature Pot Rose Production     

YU Wen-jin  Kitarnura Ryo  Kato Katsuhiko  LI Lian-hua  Fukui Hirokazu 《中国农业科学(英文版)》2010,9(3):370-377

In this study, we developed a computer program for automatic prediction of watering time point by considering the environmental factors such as solar radiation, air temperature and relative humidity based on the multiple linear regression equation of leaf area and Penman Method. The experiments were carried out for a year in two watering experimental plots, one of which was controlled by pF value, and the other by the computer program. After comparing the results of the two plots, the following findings were obtained. In the computer program plot, the observed and predicted values of both leaf area and evapotranspiration indicated significant correlation at the 1% level, which suggested that the computer program had high prediction accuracy. In addition, no significant difference was observed between the two experimental plots with respects to the plant height, plant diameter, leaf area, leaf number, fresh weight, and dry weight, which demonstrated that the plants in the computer program plot had normal growth. On the other hand, although the number of flower buds and flowering shoots showed higher values at the end of certain cultivations in the computer program plot than those in pF value plot, we proposed that it was due to the effect of cumulative daily solar radiation in the greenhouse, rather than the watering. Thus, we have reached the conclusion that the computer program for automatic prediction of watering time point developed by this study has high applicability in miniature pot rose production.  相似文献   

图书馆勤工俭学科学管理的实践与探索——以南京信息工程大学为例   总被引：1，自引：0，他引：1  

周莲云 《农业图书情报学刊》2012,24(3):196-200

以南京信息工程大学图书馆为例,阐述了高校图书馆开展勤工俭学活动的现实意义以及勤工俭学对高校图书馆的发展的有益促进作用。通过对南京信息工程大学图书馆勤工俭学进行科学管理的实例分析,总结出了该校图书馆勤工俭学科学管理的一些成功经验,以助图书馆同行们共同关注与探索。  相似文献   

土耳其能源教育计划概况及述评     

宋仰泰 《计算机与农业》2012,(1):107-108

土耳其对能源教育有着特殊的兴趣。对土耳其目前的能源教育计划、结构及现状与前景进行了剖析，在此基础上，提出土耳其欲想发展自己的能源教育，就必须及时建立有效的、包括正式与非正式环境教育在内的能源教育计划。  相似文献   

两种饲喂技术对仙湖肉鸭配套系种鸭生产性能的影响     

苏伟岳  杨承忠  施启顺  黄得纯  杨冰 《中国家禽》2006,28(2):17-19

试验以1860只仙湖鸭父母代雏鸭随机分成Ⅰ、Ⅱ两组,每组930只,在相同的饲养管理条件下,对种鸭4周龄限饲与8周龄限饲两种饲喂技术进行对比试验。其中Ⅰ组为对照组,采用8周龄限饲饲喂技术;Ⅱ组为试验组,采用4周龄限饲饲喂技术。经过64周试验,结果表明,8周龄限饲技术下的种鸭产蛋率、种蛋合格率、受精率与孵化率虽略高于4周龄限饲技术,但耗料多、产蛋少、经济效益低,因此4周龄限饲技术优于8周龄限饲技术。  相似文献   

长输管道水力瞬变仿真   总被引：2，自引：0，他引：2  

刘刚  蒲家宁 《油气储运》2000,19(3):16-20

根据各种管道边界的瞬变方程和管道水击的连锁Ａｌｌｉｅｖｉ方法，针对具有实际元器件和边界的长输管道的不稳定流动，设计了基于特征线差分解法的分析流程和仿真计算程序。利用长输管道水击数值计算所得线路上各节点的瞬态值进行Ｂ样条曲线拟合，实现了水力瞬变过程中线路水力坡降线及某些水力参数变化情况的图形输出 。  相似文献   

An Adjustable Nutrient Margin of Safety Comparison Using Linear and Stochastic Programming in an Excel Spreadsheet     

《The Journal of Applied Poultry Research》2007,16(4):514-520

A stochastic-linear program Excel workbook was developed that consisted of 2 worksheets illustrating linear and stochastic program approaches. Both approaches used the Excel Solver add-in. A published linear program problem served as an example for the ingredients, nutrients, and costs and as a benchmark in the development of the linear and stochastic programs. Standard deviations for ME and nutrients were taken or calculated from CV, and from a commercial publication of sources for amino acids. The Excel spreadsheet was set up so that the calculated margin of safety (MOS) value, according to the requested probability, was the same for both the linear and stochastic programs. As an example, the probability for meeting the nutrient value for protein was compared at 50% (MOS = 0) and 69% (MOS = 0.5) by using both linear and stochastic programming. Spreadsheet results illustrated the flexibility, accuracy, and precision of the stochastic program over the linear program in meeting the requested nutrient probability.  相似文献   

高校图书馆勤工助学初探   总被引：1，自引：0，他引：1  

林秋芸 《农业图书情报学刊》2008,20(6):190-192

由于高等教育普及、高校学生人数猛增和高等教育收费增加等因素,高校贫困生问题日益突出。图书馆人力资源不足,针对福建农林大学贫困生多的现状和图书馆使用学生工过程中出现的问题提出相应的管理办法,实践证明图书馆使用学生工可获得多赢结果。  相似文献   

《牧草栽培学》课程整体教学改革与实践   总被引：1，自引：0，他引：1  

孙飞达  张新全  干友民 《畜牧与饲料科学》2009,30(5):143-144

通过时<牧草栽培学>课程教学内容、教学方法、教学手段和教学实习等方面的投入和研究,提出了完整的<牧草栽培学>教学体系和改革方案.进而提高<牧草栽培学>的课堂教学质量.  相似文献   

最大熵技术分析湖南汽车工业发展优序     

王道平  李树丕 《湖南农业大学学报(自然科学版)》1998,25(6)

运用最大熵技术对湖南汽车工业部分重点企业进行了优序分析，并以此为基础，探讨了湖南汽车工业应优先发展的产品，针对性地提出了加快发展湖南汽车工业的若干建议。  相似文献   

可利用氨基酸饲料配方技术的软件开发     

谢振宇  冯文喜  谢镇玲  朱江 《农业网络信息》2008,(5):15-17

设计饲料配方程序,将可利用氨基酸饲料配方技术与电脑编程技术进行有机地结合,并进行线性规划算法改进和功能创新,使这项技术更具实用性和人性化.  相似文献