猴面包树引种栽培及其应用前景

介绍了猴面包树的形态及生物学特性、分布与原产地概况，世界各地引种栽培及其在食品、饮料、医药和纺织等方面的传统利用和产业化开发现状。根据其生物气候参数分析我国适宜引种区域并展望在我国引种与推广应用前景。     

云南白雪茶研究现状及开发利用

云南白雪茶是滇西北高寒地区民间特有的一种长期使用的药物和保健饮品,具有茶文化特征.从云南民间的食用经验来看,白雪茶具有显著的清热、止咳、安神等保健作用,现代药理学研究又证明,白雪茶还具有抗炎、解热、抗疲劳、抗辐射、促进免疫等药理学活性.根据雪茶的研究现状对其植物学特性、化学成分、保健作用作了简要的阐述,为以后的开发利用提供了理论依据.     

花生副产物在畜牧生产中的综合利用

花生在生产过程中产生大量副产物,其营养价值较高,是重要的饲料加工原料。文章主要针对花生生产过程中副产物营养价值及在畜牧生产中的利用进行综述。     

电站余热淡化海水研究

提出了一种直接利用燃煤电站余热淡化海水装置，从理论上研究了最高海水温度对系统性能的影响，分析了最高盐水温度对装置的造水比和冷却海水流量的影响以及该系统的经济性。结果表明：该系统能耗小，淡化成本低，同时利用了大量余热，证明该装置具有较大的应用前景。     

4种种植体系的水肥利用状况和经济效益比较

为了筛选适宜曲周县后老营村农业生产的较优种植体系并设计更好的种植体系,采用随机抽样调查的方法,对该村主要作物的种植体系及其水肥资源利用状况和经济效益进行了详细调查。结果表明:棉花-西瓜套作体系的水肥资源利用率最高,小麦-西瓜-玉米间套作体系的经济效益最好,棉花-西瓜套作体系次之,二者差异不显著。未来可以基于这2种种植体系重新设计新的种植体系,从而在生态、经济、环境等方面取得较好的综合效益。     

水稻耐寒恢复系科恢36的选育与应用

科恢36是重庆师范大学以明恢63/泰引1号(9)//糯89-1(♂)杂交选育而成的水稻新恢复系,具有耐冷性强、恢复力强、花粉量充足等特点,2013年通过重庆市技术鉴定,所配组合冈优36(冈46A/科恢36)于2012年通过重庆市品种审定.     

后备公猪的科学选育与利用

后备公猪的科学选育及利用直接影响猪场制种效果和经济效益,同时也能体现规模化猪场的制种技术与水平。文章针对后备公猪选育的基本环节和操作要点,从如何选种选育、科学饲养管理、合理配种利用等方面进行系统阐述,为规模化猪场后备公猪生产提供技术指导和参考依据。     

How do timing,duration, and intensity of drought stress affect the agronomic performance of winter rye?

Winter rye (Secale cereale L.) will be especially affected by drought induced yield losses in Central and Eastern Europe in the future because it is predominantly cultivated on low-fertile soils with a poor water-holding capacity. In order to examine the performance of winter rye under different drought conditions, field experiments were carried out during the years 2011, 2012, and 2013 near Braunschweig, Germany. Two sets of genotypes were tested under severe, mild, pre-anthesis, and post-anthesis drought stress in rain-out shelters as well as under rainfed and well-watered conditions. The grain, straw, and total above ground biomass yields, harvest index, grain yield components, leaf area index (LAI), and phenological characteristics were examined, as well as phenotypic correlations between grain yield and further characteristics. Drought induced grain yield reduction ranged from 14 to 57%, while straw yield and harvest index were lesser affected by drought than the grain yield. Under drought conditions, fully ripe was reached up to twelve days earlier than under non water-limited conditions. Pre-anthesis drought mainly reduced spikes m⁻² and kernels spike⁻¹ while drought during grain filling reduced the 1000-kernel weight (TKW) only. The grain yield was positively associated with straw yield, spikes m⁻², and kernels spike⁻¹ under water limited conditions while the TWK was only positively associated with grain yield under drought during grain filling. Consequently, high pre-anthesis biomass as well as high numbers of spikes m⁻² and kernels spike⁻¹ are especially important for obtaining high grain yields under water-limited conditions. Focusing on these traits is, therefore, recommendable for developing drought tolerant rye genotypes.     

动态细分饲粮营养供给对肉鸡生产性能、肉品质、氮与磷代谢率及血清生化指标的影响

本试验旨在根据肉鸡生长曲线及动态营养需要,研究动态细分饲粮营养供给对肉鸡生产性能、肉品质、氮、磷代谢率及血清生化指标的影响。选取1日龄爱拔益加(AA)肉鸡240只(公母各占1/2),随机分为3个组,分别为A组:每3.5 d 1个营养标准(1~7日龄1个营养标准);B组:每7 d 1个营养标准;C组:每14 d 1个营养标准。每组8个重复,每个重复10只鸡,试验期42 d。结果表明:1)C组肉鸡的平均日增重(ADG)显著高于A、B组(P0.05),料重比(F/G)显著低于A组(P0.05)。A、B组肉鸡生产性能指标差异均不显著(P0.05)。不同动态细分饲粮营养供给方式对肉鸡肉品质的影响无显著差异(P0.05)。2)不同动态细分饲粮营养供给方式对肉鸡氮、磷代谢率的影响无显著差异(P0.05)。3)肉鸡28日龄时,C组肉鸡血清尿素氮(UREA)含量显著高于A组(P0.05);42日龄时,C组肉鸡血清UREA含量显著高于A、B组(P0.05),但A、B组肉鸡血清UREA含量差异不显著(P0.05)。4)不同动态细分饲粮营养供给方式对肉鸡血清皮质酮(CORT)含量及总抗氧化能力(T-AOC)的影响差异不显著(P0.05)。综上所述,每14 d 1个营养标准可使肉鸡的生产性能达到最佳,从实际操作的复杂性考虑,每7 d 1个营养标准可更好地满足饲粮的氨基酸平衡。