连江县葡萄产业现状与发展

正连江县葡萄集中种植于东岱镇,该镇地处连江县东南部,敖江入海口南岸冲积平原,属亚热带海洋性季风气候。东岱镇以葡萄为农业主导产业,连片种植2000多亩,主栽巨峰葡萄,均采用露地棚架栽培模式,产量1500kg/667m2。近年来,由于大部分种植户不注重提升栽培管理技术及外来葡萄的冲击,葡萄产业的效益有所减少。1连江县葡萄产业存在的问题1.1品种结构单一连江葡萄无论从栽培面积或是产量上以巨峰为主,占葡萄     

成龄巨峰葡萄园提质增效栽培技术

巨峰葡萄的栽培是葡萄栽培中的一项重要组成部分,在巨峰葡萄的栽培中,部分种植户为使巨峰葡萄的产量加大,不惜使用激素、过早采摘等手段,致使巨峰葡萄的品质严重下降。因此,应在实践中不断总结经验,找出巨峰葡萄生产的问题所在,并提出相应解决措施,从而提高巨峰葡萄的生产质量。     

根域限制栽培对葡萄果实品质的影响

以"巨峰""夏黑"葡萄为材料,进行根域限制棚架栽培,与同样条件下的非限根栽培方式进行比较。结果表明,在根域限制下"巨峰"和"夏黑"树体生长受到抑制,但有利于葡萄的花芽分化,能明显地促进葡萄的生长发育,提高葡萄果实的产量和品质。     

1PM—88葡萄埋土机

新疆是我国最大的葡萄产区，总产量居全国之首。得天独厚的自然条件和丰富的葡萄品种资源，使葡萄产业成为新疆经济发展的一大优势。随着我区特色果品产业及葡萄加工业的发展，葡萄种植面积不断增加，葡萄生产过程劳动强度越来越大。     

不同架式栽培对3个葡萄品种生长发育的影响

选取当地主栽的3个葡萄品种——矢富罗莎、藤稔、巨峰,分别采用3种不同的栽培架式进行种植,观察它们的生长发育状况并进行经济指标的量化分析,结果表明:栽培架式与葡萄的生长发育有较强的相关性,不同的品种应选取相适宜的架式进行栽培,其中矢富罗莎最适宜于单臂篱架栽培,藤稔最适宜于双十字"V"形架栽培,而巨峰适合于水平棚架栽培。     

浅析乌海市葡萄机械化生产现状与发展对策研究

乌海市葡萄种植已有40多年的历史,近年来葡萄种植面积不断扩大,葡萄品质不断提高,葡萄酒生产上规模的企业不断增加,多家葡萄酒品牌已在全国崭露头角,因此广大种植户对实现葡萄生产机械化的愿望愈加强烈。葡萄种植生产环节较多、较复杂,农艺要求严格,而传统的人工操作质量差、劳动强度大、效率低、费用高,立足乌海市葡萄产业优化和种植结构调整,不断提高乌海市葡萄生产力水平,因地制宜地探索出具有乌海市地区特色的葡萄生产全程机械化也就成为乌海市农机化发展的重点。     

影响巨峰葡萄贮藏效果的因素分析

<正> 近10年来,我国葡萄栽培面积增加了5倍。其中巨峰品种发展最快,全国种植面积已逾50万亩,成为我国葡萄栽培面积最大的品种,辽宁、山东、河北等不少集中产区已出现卖果难的问题。与龙眼等欧洲种品种比较,巨峰品种贮藏期间易出现失水干梗、脱粒,贮藏难度较大。研究影响巨峰葡萄贮藏的主要因子,提高贮藏效果,对扩大巨峰贮藏量,延长巨峰葡萄的销售期,具有十分重要的意义。     

不同海拔和栽培模式对巨峰葡萄果实糖含量及酶活性的影响

为研究巨峰葡萄在不同海拔地区最有效的栽培模式,提高葡萄果实品质,增加南方葡萄产业经济效益,以390m和1 150m钢架避雨栽培和露地栽培的巨峰葡萄为试验材料,研究不同海拔和栽培模式对巨峰葡萄果实可溶性糖及相关糖代谢酶活性的影响。结果表明:成熟的巨峰葡萄果实中的可溶性糖为葡萄糖、果糖和蔗糖,葡萄糖和果糖为主,蔗糖含量少,酸性转化酶(AI)和蔗糖合成酶分解方向(SSI、SSc)活性较高,而中性转化酶(NI)、蔗糖磷酸合成酶(SPS)和蔗糖合成酶合成方向(SSII、SSs)酶活性较低。高海拔(1 150m)地区和钢架避雨栽培模式均可以提高巨峰果实中可溶性糖的含量和相关糖代谢酶活性,提高葡萄果实品质。     

福安市巨峰葡萄优质栽培要点

巨峰葡萄在福建省福安市种植长达三十多年，已成为当地农民增收致富的重要产业。文章根据对福安市的巨峰葡萄栽培进行的长时间的调查和研究，阐述了提高果品质量的栽培技术要点，以增加果农经济收益。     

巨峰葡萄一年两熟延后栽培新技术

正鲜食葡萄成熟采摘期过于集中是广西葡萄产区普遍存在的一个问题,通过技术措施调控葡萄成熟期,能有效提高鲜食葡萄市场竞争力,提高经济效益。近年来,笔者利用中熟葡萄品种巨峰进行一年两熟栽培新技术试验示范,使广西桂林市巨峰葡萄成熟期由常规栽培的7月下旬至8月中旬上市调整到10月上旬上市,葡萄品质和栽培效益显著提高。如桂林市兴安县五甲村张雪峰巨峰葡萄     

微波消解——原子吸收法测定烟叶中铜铁锰锌钙镁钾含量

用微波消解火焰原子吸收法测定了烟叶中的铜、铁、锰、锌、钙、镁、钾含量。该法快速、简便、准确,相对相差为0.1%～8.3%,回收率为94%～106%。     

Segregation of form, color, movement, and depth: anatomy, physiology, and perception

Anatomical and physiological observations in monkeys indicate that the primate visual system consists of several separate and independent subdivisions that analyze different aspects of the same retinal image: cells in cortical visual areas 1 and 2 and higher visual areas are segregated into three interdigitating subdivisions that differ in their selectivity for color, stereopsis, movement, and orientation. The pathways selective for form and color seem to be derived mainly from the parvocellular geniculate subdivisions, the depth- and movement-selective components from the magnocellular. At lower levels, in the retina and in the geniculate, cells in these two subdivisions differ in their color selectivity, contrast sensitivity, temporal properties, and spatial resolution. These major differences in the properties of cells at lower levels in each of the subdivisions led to the prediction that different visual functions, such as color, depth, movement, and form perception, should exhibit corresponding differences. Human perceptual experiments are remarkably consistent with these predictions. Moreover, perceptual experiments can be designed to ask which subdivisions of the system are responsible for particular visual abilities, such as figure/ground discrimination or perception of depth from perspective or relative movement--functions that might be difficult to deduce from single-cell response properties.     

ICP-OES法同时测定果蔬中铅、砷、镉、铬、铜、锡含量

果蔬样品经混酸消化后,控制一定的酸度,定容后应用等离子体发射光谱法(ICP-OES)对果蔬中铅、砷、镉、铬、铜、锡六种有害重金属进行测定,研究了分析测定条件,方法简单快速。测定结果表明,五种元素的加标平均回收率在91.0%~107%之间。其RSD均小于3.5%。按该方法进行处理及测定铅、砷、镉、铬、铜、锡,在选择的测定条件下最低检出限分别为0.0006 mg/kg、0.0003 mg/kg、0.00003 mg/kg、0.00005 mg/kg、0.00003 mg/kg、0.0006 mg/kg。     

原花青素的性质、功能、纯化和利用

原花青素广泛分布于高等植物的多种器官和组织中,是黄烷-3-醇的游离、寡聚或多聚物,存在侧基修饰、异构性质、聚合方式、聚合度等的多样性,可采用多种色谱和质谱技术进行纯化和鉴定。原花青素对于植物具有抗紫外线、清除自由基、抗病驱虫、影响种子休眠等功能,影响作物品质等性状,对人体也具有多种生理功效,在药物、化妆品、食品等领域有良好的应用前景。     

穴盘规格和苗龄对塑料大棚菜豆性状及产量的影响

本试验以菜豆品种先行者为试材,采用32孔、50孔两种规格穴盘,设置10、15、20、25 d等4个苗龄段,通过研究不同穴盘规格和苗龄对菜豆性状及产量的影响,筛选出适合菜豆育苗的穴盘规格和适宜的苗龄。结果表明：穴盘育苗的营养面积增大,菜豆产量随之增加,25 d苗龄条件下,32孔穴盘的前期产量和总产量均显著高于50孔穴盘;随着苗龄的增长,菜豆的前期产量和总产量呈增加趋势,其中25 d苗龄的产量显著高于其他苗龄。综合上述各项指标,菜豆育苗阶段,10 d苗龄可选用32孔、50孔穴盘,15 d以上秧苗选用32孔穴盘为宜。     

贵州樟科、景天科等9个科药用植物资源的种类与分布

通过野外调查、标本采集、分类学研究及资料考证,基本摸清了贵州樟科、莲叶桐科、景天科、堇菜科、柳叶菜科、鹿蹄草科、柿科、山矾科、木犀科等9个科药用植物资源的种类与地理分布.结果发现贵州现有樟科药用植物49种4变种,莲叶桐科药用植物5种,景天科药用植物21种,堇菜科药用植物19种1变种,柳叶菜科药用植物20种4变种,鹿蹄草科药用植物7种1变种,柿科药用植物9种1变种,山矾科药用植物12种,木犀科药用植物30种3变种.其中,4种为贵州特有药用植物,40种5变种为贵州药用新资源.     

Nonconversion of o,p'-DDT to p,p'-DDT in rats, sheep, chickens, and quail

The finding of appreciable quantities of p,p'-DDT after feeding o,p'-DDT to rats led to the proposal of a theory, that an isomeric metabolic conversion occurs. The presence of p,p'-DDT as an impurity in supposedly pure samples of o,p'-DDT is the correct explanation for the appearance of p,p'-DDT. Purified o,p'-DDT and (14)C-labeled o,p'-DDT yielded no data to support the idea that o,p'-DDT is converted to the p,p'-DDT isomer.     

Mineralogy, petrology, and surface features of lunar samples 10062,35, 10067,9, 10069,30, and 10085,16

The primary rocks are a sequence of titanium-rich basic volcanics, composed of clinopyroxene, plagioclase, and ilmenite with minor olivine, troilite, and native iron. The soil and microbreccias are respectively loose and compacted mixtures of fragments and aggregates of similar rocks, minerals, and glassy fragments and spheres. Impact events are reflected by the presence of shock metamorphosed rock fragments, breccias, and glasses and their resulting compaction to form complex breccias, glass-spattered surfaces, and numerous glass-lined craters. Chemistry of the glasses formed by the impact events is highly variable, and the high iron and nickel content of a few moundlike features suggests that at least some of the projectiles are iron and nickel-rich meteorites.     

Portrait of Science. Scientist, technologist, proto-feminist, superstar

Although Marie Curie is known primarily for her discovery of radium, her true gift to science was her realization that radioactivity is an intrinsic atomic property of matter rather than the result of chemical processes. She was one of the few Nobel laureates to win the prize twice (physics and chemistry). During her career and as one of the first prominent women scientists, she became increasingly aware of the need for funding for research and of the scientific freedom that money can bring. By nature shy and reserved, Marie's fame, as both a scientist and as an exemplar of a liberated professional woman of the roaring twenties, grew to superstar proportions.