泽州县生态园林村镇建设的实践与思考

通过介绍加强村镇生态环境建设,努力为广大人民群众创造一个优美、舒适、健康、方便的生活居住环境,是21世纪生态林业建设的重要工作,也是推动社会主义新农村建设,全面建设小康社会目标的重要内容。通过分析山西泽州县村庄生态园林绿化的现状,提出农村生态园林绿化的标准和模式,并就村庄园林绿化存在的问题,提出解决办法。     

哈尔滨市及周边地区大豆农户生产技术需求调查分析木

通过对哈尔滨周边6个县(市)13个村的大豆农户进行入户调查,得出该区域大豆农户急需的前5位大豆生产技术类型,分别是新品种、新农药、新肥料、病虫草害防治技术和高产技术;前10位的具体技术措施,分别是高产品种、高产与优质兼顾品种、优质品种、复合肥、抗重迎茬技术、化学农药、病虫害精准防治、病虫害精准预报、农药减施技术、栽培模式。在分析农户大豆生产技术需求优先序列的基础上,就如何提高我省大豆生产技术应用水平提出政策建议。     

生长肉牛的氨基酸需要量研究进展

研究反刍动物氨基酸需要量的最常用方法为屠体氨基酸分析法和真胃或十二指肠灌注法 ,研究者们采用不同的方法研究了肉牛的氨基酸需要量。在生长肉牛的实用日粮条件下 ,蛋氨酸或赖氨酸常为第 1限制性氨基酸     

元阳薪材树种研究

本文通过元阳薪材树种的研究,论述了筛选薪材树种的必备条件、相互关系及其配置原理等。并筛选出乡土薪材树种和外引树种,这对解决当今农村能源短缺,发展绿色再生能源方面具有重要意义。     

基于农村外出人口角度的新型农村合作医疗制度研究

通过对北京市外来人口医疗需求及意愿、新农合制度的保障程度、对新农合制度的满意度的调查研究,以及对XY市GS县县外定点试点效果的分析,得出以下结论：第一,现阶段新农合制度设计难以满足农村外出人口的医疗保障需求;第二,县外定点的试点初衷良好但是效果不佳。因此,建议政府要么改变新农合制度的设计;要么,在保留原制度设计的同时,针对外出农民专门设计新的政策。     

金融危机下我国商业银行资本约束的逆周期性研究

采用2004年第1季度到2008年第2季度我国商业银行季度面板数据,分析我国商业银行资本约束对宏观经济周期的影响。研究结果表明:资本约束可以通过货币政策传导影响我国宏观经济周期,表现出一定的顺周期性;同时研究也证明了资本约束下低资本水平银行的顺周期性明显要高于高资本水平银行,严格的资本约束具有逆周期性。     

仔猪早期断奶对Fe、Cu、Mn、Zn、Se需要量的研究

采用饲养试验、平衡试验、屠宰试验方法测定二元或三元杂交早期断奶仔猪对不同水平的Fe、Cu、Mn、Zn、Se需要量的研究。初步认为,实行35～40日龄断奶仔猪,每千克风干饲粮中含Fe 105 mg/kg,Cu 200 mg/kg,Mn 3.0 mg/kg,zn 98 mg/kg,Se0.3mg/kg,可获得20kg左右的双月个体重。     

VICH血药法生物等效性指导原则概述

血药法生物等效性试验是开展兽药比对试验工作的重要手段之一。VICH血药法生物等效性指导原则介绍了除多次采血困难的靶动物(如蜂、鱼)的动物血药法生物等效性的实验建议,使基本药代动力学试验、生物等效性试验设计和统计分析原则等在VICH地区得到互认。该指导原则2016年8月开始实施。     

城市林业发展史回顾

城市林业从其产生、发展直到今天 ,将其划分为萌芽、建立和巩固与发展等 3个阶段 ,城市林业的发展具有明显的阶段性、显著的加速性和区域的不平衡性。城市林业兴起于社会经济需要 ,也必将服务于社会经济需要     

The role of phospholipids in nutrition and metabolism of teleost fish

It has been known for almost 25 years now that inclusion of intact phospholipids in the diet could improve culture performance of various freshwater and marine fish species. The primary beneficial effect was improved growth in both larvae and early juveniles, but also increased survival rates and decreased incidence of malformation in larvae, and perhaps increased stress resistance. Determination of absolute dietary requirements has been hampered by the use, in different dietary trials, of a wide range of phospholipid preparations that can vary greatly both in phospholipid content and class composition. Larval studies have been compromised further by the need on many occasions to supply phospholipid through enrichment of live feeds with subsequent re-modelling of the phospholipid and fatty acid compositions. Generally, the levels of phospholipid requirement are around 2–4% of diet for juvenile fish and probably higher in larval fish. The effects were restricted to young fish, as a requirement for dietary phospholipids has not been established for adult fish, although this has been virtually unstudied. As the majority of studies have used crude mixed phospholipid preparations, particularly soybean lecithin, but also other plant phospholipids and egg yolk lecithin, that are enriched in several phospholipids, it has been difficult to elucidate which specific phospholipid classes impart beneficial effects. Based on the few studies where single pure phospholipid species have been used, the rank order for efficacy appears to be phosphatidylcholine > phosphatidylinositol > phosphatidylethanolamine > phosphatidylserine. The efficacy of other phospholipid classes or sphingolipids is not known. The mechanism underpinning the role of the phospholipids in larval and early juvenile fish must also explain their lack of effect in adult fish. The role of phospholipids appears to be independent of fatty acid requirements although the presence of an unsaturated fatty acid at the sn-2 position may be important. Similarly, the phospholipid requirement is not related to the delivery of other essential dietary components such as the bases choline and inositol. Studies also suggested that the phospholipid effect was not due to generally enhanced emulsification and digestion of lipids. Rather the evidence led to the hypothesis that early developing stages of fish had impaired ability to transport dietary lipids away from the intestine possibly through limitations in lipoprotein synthesis. The current hypothesis is that the enzymic location of the limitation is actually in phospholipid biosynthesis, perhaps the production of the glycerophosphobase backbone and that dietary supplementation with intact phospholipids in larvae and juvenile fish compensated for this. Thus, dietary phospholipids increase the efficiency of transport of dietary fatty acids and lipids from the gut to the rest of the body possibly through enhanced lipoprotein synthesis.