树莓引种及栽培技术初探

树莓在我国南北方均有生长,北方虽有栽培,但因品质较差,未能形成商品。由于树莓果实富含人体所需要的营养物质和保健物质,被誉为“第三代”水果。树莓果实除鲜食外,加工制成果汁、果酱、冰淇淋、奶酪等产品,在国际市场深受欢迎,供不应求。栽培树莓投资少、效益高、时间短、见效快、适应性强,是适合退耕还林、水土保持,帮助农民脱贫致富的优良果树。然而,目前我国对树莓的研究较少,无论是品种培育还是栽培技术方面的研究都少见报道。本文在成功引种栽培树莓品种Williamette(威廉米特)和Meeker(梅凯)的基础上,介绍树莓栽培的特点。     

发展高科技水果树莓市场前景十分广阔

树莓为多年生藤木本水果，寿命长，受益快,当年栽培当年挂果，第三年进入盛果期.盛果期可连续达３０年以上，每年５月左右开花，６月下旬至７月初成熟,上市时正值市场水果淡季。树莓是中国科学院在“８６３”高科技实施过程中，采用国际上最先进的多倍体物种育种技术，将草莓基因转入经人工“驯化”的野树莓体内而育成的一种植株。前三年为藤本生长期，需搭架栽培,三年后木质化，可免架，自然形成”树”形。叶片及果实均无刺，果实大，产量高，品质好，是色、香、味俱佳的高级水果。其甜度是草莓的４倍，每千克树莓果搅碎后对水１２ｋｇ，不…     

树莓茎段培养技术研究

树莓(Rubus palmatus Thunb)为蔷薇科悬钩子属小灌木浆果树种，其果实营养丰富，尤其含有黄酮、花青素等药用成份，具有抑制癌细胞和抗心血管病等功效。近年来在国际市场上相当热销，正在成为果树行业的增长点之一。2000年本中心从外地引进红树莓和黄树莓两个品种。树莓通常     

经济角

树莓的引种和市场前景分析树莓为蔷薇科悬钩子属灌木性植物，在我国有200多种野生资源，南方俗称“复盖子”，北方俗称“托盆”，分布区域极为广泛。人工栽培品种分为黑莓、红树莓两大系列品种。目前以欧美为代表的优良栽培品种数以百计。我国在本世纪初曾从俄罗斯远东地区引进当地栽培品种，在黑龙江、吉林、辽宁均有栽培。上世纪80年代，南京植物园和沈阳农大开始零星引进国外品种，树莓人工栽培在辽宁、吉林、山东、江苏有了一定发展。树莓在世界上被誉为“黄金水果”。除富含果糖、维生素、氨基酸，风味香醇，酸甜可口外，还有三大保健…     

不同浓度山梨酸钾对树莓果实品质的影响

为了解不同浓度山梨酸钾对树莓果实贮藏品质的影响,试验设常温17~20℃,冷藏(-1.1±0.4)℃两个贮藏条件;并在两种条件下分别设5个处理组,即在树莓果实中添加不同浓度的山梨酸钾,一个空白对照(不添加保鲜剂),测定各处理组的感官品质、好果率、烂果率、可滴定酸含量等指标。结果表明:冷藏条件更有利于树莓果实保鲜期的延长;两种贮藏条件下,山梨酸钾对树莓果实均具有一定的保鲜作用,且各项指标测定结果较好的处理组其山梨酸钾浓度为0.5 m L/kg。用浓度为0.5 m L/kg的山梨酸钾对树莓果实进行保鲜,不仅保鲜效果好,还可延长树莓果实的保鲜期。     

浆果类果汁的酶法生产工艺及配方

草莓、杨梅、树莓等浆果类水果的色泽一般多为红紫色,果实柔嫩多汁,风味独特;但收获期短,上市集中,保藏和运输较困难,易腐烂变质。利用浆果资源生产系列果蔬汁饮料,是解决这一问题的有效途径,也符合当代饮料发展的方向。     

攀枝花地区水果黄瓜品比试验初报

通过对8个水果黄瓜品种进行品种比较试验,调查其果实性状、产量品质等方面的特性,筛选适合攀枝花地区栽培的高产优质品种。试验结果表明:迷你无刺水果黄瓜和荷兰进口油瓜表现最好,长势旺盛,始收期早,采收期长,产量较高,口感品质好,抗病性较强,可作为攀枝花地区水果黄瓜早春大棚栽培的主推品种。     

兰州市设施油桃栽培中主要病虫害及其防治措施

油桃果实颜色鲜艳,味道芳香浓郁、酸甜适口,是夏季进入市场的先锋水果品种之一。日光温室油桃栽培技术实现了水果的淡季供应,经济效益显著。现针对油桃主要病虫害进行观察,并开展无公害防治研究,总结出主要病虫害的发生规律及无公害防治技术,使其优质果率明显提高。     

一种蛋白质能让花开得更鲜艳

花朵的缤纷色彩、果实的艳丽颜色，主要是由花青素决定的。日本研究人员日前对牵牛花进行研究后发现．有一种蛋白质能够增加花青素含量。这一发现有望促进开发出更加艳丽的花卉和水果品种。     

HPLC法测定不同季节成熟的树莓中酚类化合物、花色苷及V_C的差异性

研究两种不同季节成熟的树莓:海尔特兹(Heritage)、秋福(Autumn Bliss)、费尔杜德(Fertod Zamatos)、米克(Meeker)共4个品种中酚类化合物、花色苷以及维生素C(V_C)的含量并作分析比较。用高效液相色谱法测定两种不同季节成熟的4种树莓中酚类物质及6种单体酚含量,同时测定花色苷总含量及维生素C的含量并做分析比较。两个季节成熟的4个品种树莓中总多酚的含量由高到低的次序为:海尔特兹秋福费尔杜德米克。其中单体酚的种类均为鞣花酸、阿魏酸、咖啡酸、对香豆酸、对羟基苯甲酸、槲皮素。4个品种的树莓中,海尔特兹的花色苷及维生素C的含量明显高于其他品种。树莓具有良好的抗氧化性,本研究中的4个品种中,秋果型双季莓海尔特兹与其他3种品种相比含有较高的植物化学物质(酚类化合物、V_C、花色苷)的水平,可以利用其生产出功能性更好,附加性更高的树莓新品种。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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