不同处理西葫芦幼瓜矿质元素分析

以早青一代为材料，测定了3种处理下的西葫芦幼瓜在发育初期4个部位的矿质元素含量。结果表明，幼瓜各部位的矿质元素平均含量随处理方法而不同；与人工授粉处理相比，其它两种处理导致瓜柄各元素含量变化的波动性减弱；在瓜柄处各元素运输量的变化在处理之间的趋同性与发育时间有关。矿质元素的变化异常是导致化瓜的部分生理原因。     

外源激素处理对不同品种西葫芦化瓜的影响

苗期、花期外源激素处理对西葫芦化瓜影响的研究表明,苗期乙烯利处理有利于雌花形成,但不利于座瓜,品种间化瓜率的高低依次是:早青一代> 南韩极早> 黑美丽,幼瓜的发育更容易受到花期外源激素的影响。在开花期用激素喷施柱头,均能够提高座瓜率,但提高的程度不同,其中40 mg/L2 ,4D 100 mg/LGA3 与100 mg/LNAA 是两种最有效的处理。从每一种激素处理的结果看,若发生化瓜,必将在花后4 ～6 天,6 天后开始从外形上可见,而正常生长的幼瓜从花后6 天开始进入迅速生长期。     

黄瓜化瓜的原因及防治对策

1．化瓜的原因 化瓜是黄瓜栽培中普遍存在的问题，直接影响着黄瓜的产量和产值，特别是前期更为突出，如果管理不当，化瓜率可高达50％～60％，甚至更高。出现化瓜的原因主要有以下几种：     

西葫芦两种发育方向的幼瓜瓜重与纵横径相关关系

通过对两种发育方向的西葫芦幼瓜瓜重与纵横径进行偏相关分析,得到幼瓜正常发育初期瓜重与纵横径的线性模型是: G= - 904 .52 71 .25L1 56 .2L2 , 方程显著存在,且偏回归系数为0 .0010 ,达到极显著。但是由于在幼瓜最终发育中断时,得到只包含横径的线性方程G= 0 .72 19 .32L2 ,偏回归系数0 .0096 ,也达到极显著。以上模型方程说明,如果发生化瓜,瓜重与纵横径之间的关系则进一步变小,以至于与纵径无关。在化瓜条件下幼瓜的纵径比横径更为敏感。     

不同处理西葫芦幼瓜发育过程中的氨基酸分析

对花期西葫芦进行人工授粉、激素处理及未授粉帮冠３种处理，花后０～１０天内每隔２天测定幼瓜瓜柄、胎座、中壁及端壁４个部位的游离氨基酸含量。分析结果表明：３种处理下４个部位的游离氨基酸含量在开花后初期都有不同程度的降低，除了幼瓜端壁在激素处理后８天出现一高峰外，都保持了受精后胎座处游离氨基酸水平高于中壁、端壁及瓜柄；激素处理初期（０～４天内）瓜柄、胎座及端壁等部位的氨基酸水平都高于未授粉处理和人工授粉     

西葫芦幼瓜发育过程中有机物质的变化研究

不同处理西葫芦幼瓜 4个同部位几种有机物质的测定结果证明 ,不同处理的幼瓜内可溶性蛋白质、还原糖含量变化比较敏感 ,而未授粉处理中这两种物质的平均含量明显都低于人工授粉与激素处理 ;所有处理中开花前蛋白质水平高于花后 ,只是未授粉处理表现更为明显 ;瓜柄还原糖含量在未授粉处理后 (花后 ) 6～ 1 0天出现一个峰值。幼瓜内各部位蛋白质含量存在胎座 >中壁 =端壁 >瓜柄的共同特点 ,而Vc含量存在胎座 >中壁 =端壁 =瓜柄的特点     

南昌地区梨瓜无公害栽培技术

介绍了南昌地区梨瓜无公害栽培技术，通过栽培试验示范梨瓜产量达kg／h，品质符合国家标准，商品性表现良好，达到增产增收的目的。     

砍瓜的栽培技术

砍瓜是菜食瓜中又一新品种，具有诸多优良性状。此瓜生长期间砍掉一块还能继续生长，顾名思义“砍瓜”。砍瓜是通过杂交、组合、定位选育而成的一个新品种，属葫芦科绿蔓匍匐一年生植物，叶心形，5-7裂，背面茸毛。同株异花，花黄色，大喇叭形。雄花茎基20厘米处开花，雌花茎基130厘米处开花，主蔓结瓜为主，权瓜为辅，从春天播种，一直到深秋，陆续开花、结瓜，结瓜期长达半年，每棵结瓜13～15条，瓜长90-160厘米，直径12-15厘米，单瓜重6公斤．9公斤，瓜形长圆柱形，瓜色先由绿后变金黄色，具有较强的食用和观赏性，可以作为生产栽培或者是在农家乐中作观赏食用栽培，具有较好的卖点。     

黑籽瓜新杂交种兰州大板二号

兰州大板二号黑籽瓜新杂交种，植株生长旺盛，瓜子饱满，籽粒大，座瓜整齐，稳定，结瓜率高，与普通籽瓜品种相比，表现出苗快，秧苗健壮，极少发生病害。在杂一代利用方面，达到国内先进水平。     

浅谈八月瓜人工栽培技术

八月瓜，又名八月炸，是传统中医材木通的果实。汉中秦巴山区混交散生分布，野生资源丰富。作为一种营养丰富新奇特优的野生保健果品，引起了广泛关注。本人在生产实践中，对八月瓜人工繁育和栽培方面进行了研究和探索。     

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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