新疆农田排水技术治理盐碱地的发展概况

农田排水技术是解决土壤盐渍化的重要方式之一。近年来依赖合理的农业节水技术和管理理念对耕地进行改造,地下水位逐年降低,绿洲农业的快速发展使人们产生重灌轻排的思想。然而本质上盐分并未脱离土壤,耕地存在次生盐渍化风险,农田排水技术任重道远。实践证明,长期应用农田排水技术在盐碱地改良、提高作物产量、促进农业经济发展等方面起着积极作用。对解放以来新疆农田排水技术治理盐碱化的发展及概况进行梳理和总结,指出农田排水技术在实际发展中存在的实际问题,并提出新形势下通过排水技术治理盐碱化的措施与建议,为今后新疆滴灌盐渍区土壤治理提供参考。     

农技咨询与专家服务系统的构建与应用

本文以增加农业科技服务有效供给、加强供需对接为着力点,以提高农业科技服务效能为目标,利用新一代信息技术构建农技咨询与专家服务系统、农技咨询小程序,探索"互联网+"农业科技服务新手段,构建起农技专家与农户之间的"桥梁",提高服务的精准化、智能化、网络化水平.系统采用B/S结构,MVC设计模型,基于JAVA技术体系进行开发...     

棉花八氢番茄红素脱氢酶GhPDS1基因的克隆与表达谱分析

八氢番茄红素脱氢酶(PDS)在胡萝卜素生理代谢和病毒诱导外源基因沉默中起着非常重要的作用.本研究通过同源克隆方法,分析已报道植物八氢番茄红素脱氢酶氨基酸保守区,设计筒并引物,扩增出编码棉花PDS基因cDNA中间片段.通过RACE技术成功地克隆了棉花PDS基因的全长cDNA,命名为GhPDS1(GenBank No.HQ...     

Virtual Studio System Technology

Virtual studio system (VSS), a new technology based on virtual reality, develops fast in recent years. Virtual studio concept replaces real background sets with computer generated 3D synthetic and combines real foreground action, with computer generated backgrounds. As VSS need not construct real background sets and has little limitness of time and space, it is regarded as a revolution in TV programs. This paper mainly discusses about the background, technology feature, application and future.     

浅析林业育苗现状及容器育苗技术的应用与推广

我国林业领域不断发展的过程中,苗木需求量随之增加,这种情况下需要加大对育苗技术的 研究,提高林业种植效益。本文主要针对林业育苗现状和容器育苗技术的应用及推广进行研究,从林 业育苗需求出发,提出有效的育苗技术,并具体分析容器育苗方法,优化苗期管理方法,以便从技术层 面出发,实现我国林业种植领域的良好发展。     

数字环境下农业科研档案资源开发与发展路径

当前,农业科学技术研究档案面临数字经济带来的历史性变革.文章基于农业科研档案的内涵价值,探讨数字环境下农业科研档案创新发展的模式与路径.以深化农业科研档案资源价值为导向,分析应用数字技术解决传统农业科研档案数字化数据与现行数字农业科研档案融合管理的实践策略与技术方案.分别分析传统载体数字化数据与现行数字农业科研档案的优...     

Migration of gluten under shear flow as a novel mechanism for separating wheat flour into gluten and starch

This paper describes a novel principle for the separation of wheat flour into starch and gluten in a concentrated medium. The process is based on the use of simple shear flow in a cone-and-cone device. The separation takes place in two steps. Initially, local segregation of gluten and starch phases occurs, leading to formation of macroscopically visible gluten patches distributed throughout the dough. This local segregation can be understood by considering the dough as a visco-elastic matrix containing an inert filler (starch). Further shearing leads to aggregation of those patches and migration (large-scale separation) towards the apex of the cone. As a result, the wheat dough is separated into a protein-poor fraction, containing less than 4% protein, and a protein-rich fraction containing almost 50% protein on a dry weight basis. However, under the process conditions used, upon a very long shearing, a redistribution of the aggregated gluten structures in the starch phase was observed, demonstrating a processing limit for the separation performance. Compared to traditional processing, the separation process presented shows opportunities for producing high quality gluten accompanied with significant water savings. Considering the fact that simple shear flow in steady rate is less harmful to gluten quality, such a separation process could benefit gluten quality.     

浅议我国玉米育种工作的限制因素及解决方法

在今后的几十年,我国玉米需求面临巨大的压力,育种目标的核心是继续提高杂交种的生产潜力和利用价值。但品种资源的狭窄制约我国生产水平的提高。因此为了实现玉米生产的可持续以展,拓宽品种资源,加强对种质的改良、扩增、创新是当务之急。玉米种质产业的发展要在种质扩增、改善品质和应用生物技术领域取得突破性进展。     

微囊藻毒素的检测方法及其降解技术研究进展

微囊藻毒素是富营养化淡水水体中最常见的藻类毒素,它是一类具有多种异构体的环状多肽物质。较详细地介绍了水体中微囊藻毒素的结构、特性及其危害,并综述了有关其检测方法及降解技术的国内外最新研究进展;最后,对微囊藻毒素降解技术的发展方向进行了探讨和展望。     

Gateway技术快速构建百合双价抗病毒RNAi表达载体

为获得适合转化百合的双价RNAi表达载体,以感病百合叶片的总RNA为模板,分别扩增400 bp左右的LSV和LMoV CP基因。通过重叠延伸PCR技术获得长约800 bp的LSV-LMoV融合基因。利用Gateway技术,通过BP反应及LR反应将LSV-LMoV融合基因克隆到双元载体pH7GWIWG2(Ⅱ),成功构建了含两种病毒基因的RNAi表达载体pH7GWIWG2(Ⅱ)-LSV-LMoV。将构建好的双价表达载体导入农杆菌EHA105,PCR和测序表明所构建的载体及获得的工程菌与预期的完全一致。