湖州市1998年迟中秋蚕血液型脓病暴发原因分析

分析了湖州市１９９８年迟中秋蚕血液型脓病暴发的原因，并提出了若干控制该病的对策。     

肉仔鸡饲料中添加消化酶制剂效果观察

近几年来,畜牧业生产的高成本已不利于其发展,特别是饲料价格的不断攀升,如何提高饲料的利用率、降低生产成本、提高经济效益是养殖者探索和追求的目标。饲料中添加有助于畜禽消化吸收的酶,来提高饲料的转化率,降低饲料及饲养成本,是现代养殖发展的一个途径。     

Effects of Soil Characters on the Tea Quality in the Tea Region of Qin-Ba Mountain,Hubei Province,PR China

Based on the analysis of physical and chemical properties of soil,nutrient elements and biochemical compositions of tea leaves,the relationship between soil characters and tea quality was studied.The results showed that soil total phosphorus,potassium,available potassium,copper and zinc were the main factors which affected and limited the content of nutrient elements of tea leaves.Furthermore,soil pH,organic matter,total nitrogen,potassium,exchangeable calcium,magnesium,available copper and zinc were the main factors affecting and limiting the content of biochemical compositions in tea leaves.Tea quality could be improved by controlling these soil factors.     

关于新仓房的设计与实用性探讨

根据中央直属储备粮库的建设的实践情况，总结了新建库所用材料及新库在防水、隔热、通风、杀虫等方面的先进性。同时也提出了一些不足之处，对设计、规划和施工等方面提出了一些改进意见。     

Effects of Weaning on Immunity and Nutrition in Piglets

The number of birth per year was an important indicator of the sow's productivity and it was related to the duration of breastfeeding.Weaning had been shown to be a stressful period.The weaning age had declined over time in order to increase sow productivity and the fact that weaning under modem-day commercial conditions inflicted stress (environmental,nutritional and psychological/social) on pigs and associated with marked changes in gastrointestinal tract (GIT) physiology,microbiology and immunology.However,the early weaning resulted in post-weaning diarrhea,mainly related to intestinal dysbiosis during this rapid adaptation to the new diet.The environment and feed had influence on physiology,gut morphology,immune system and diseases of weaned piglets.     

依据档案看参考咨询服务的发展脉络及前景探析

参考咨询服务是图书馆目前最富创新力的一项服务.以图书馆档案为事实依据,阐述了参考咨询服务的发展脉络,并对其发展前景进行探析,以期为今后的工作提供一些启示.     

变时相生长模型技术及其在小班数据更新中的应用

小班数据更新是地方森林资源监测和资源档案管理的需要，实现它的必要条件是建立小班动态数据库和建立小班数据更新模型。本文着重对后者的现实林分建模中每年变化的大量的部分，采伐的问题处理，根据微变化调整原理，提出变时相生长模型技术，从而消除了误差逐年积累和放大的问题，提高了小班数据更新的可靠性。     

桓台县土地可持续生产的限制因素及对策

对桓台县限制粮田土地可持续生产的因素进行了分析，指出了土壤养分失衡，部分肥力性状弱化以及可能的氮素污染和某些持续性的难以有效应用等将可能成为土地持续生产的限制因素，并提出了相应的改进对策。     

利用比阻测算管路流量

在有压管路供水时，为了节约用水，合理分配，往往要进行水的量测。利用比阻测算管路流量是一种测量简单、计算方便的测量方法。