介绍计算化肥合理配比的简便方法

在生产上，根据土壤的性质和土壤中所含氮、磷等元素的丰缺情况，确定合理的氮磷施肥比例，再按所用各种化肥中含氮磷成分的数量来计算各种化肥合理的配合比例，因土、因作物合理施肥，避免盲目施肥，是提高施肥增产效果的有效途径。当前，市面上化肥的种类比较多，各种养分的含量也各不相同。因此，必须根据合理的氮磷施肥比例和所用化肥中各种养分的含量来正确计算出各种化肥合理的配合比例，做到合理施肥，提高肥效。现根据我们几年来的实践，介绍～种简单便捷的计算方法，供应用参考。现以小麦田施肥为例，说明如下。小麦施肥合理的氮磷…     

小麦专用肥

该项目主要是对小麦专用肥的生产工艺、配方、应用技术、推广体系以及效益等方面进行了系统研究,其配方设计是根据近十年来多项肥料研究成果而制定的,又在三年多的试验示范中经过检验与矫正,它融合小麦需肥特点、土壤养分丰缺情况和施肥技术于一体,探索出先进的生产工艺,使得产品不仅养分全、浓度高,而且质量指标全部达到化工部颁     

杉木种子园测土施肥模式

通过对福建省三明市官庄林场杉木种子园深翻施肥试验结果进行数理统计分析,以获得土壤养分含量对球果产量的多元回归方程,作为预测种子园球果产量的模式;进而求得在一定限制条件下能获取最高产量的土壤养分状况,作为种子园土壤养分标准状况。其它杉木种子园土壤经测定养分后与之相比,便知土壤养分缺乏的种类和程度,由此确定合理施肥方案,这便是测土施肥模式。     

基于Web GIS变量施肥决策系统的研究

兵团各团场积累了大量的土壤养分、盐分、质地、施肥情况等资料,对于这些宝贵资料部分团场加以利用,开发出了计算机条田信息管理、计算机决策施肥等系统,构建构建棉田养分管理、施肥推荐决策与滴灌施肥自动控制为一体的综合管理系统。     

晋城市果园养分状况及施肥技术初探

介绍了晋城市果园土壤养分及施肥状况，分析了土壤养分失衡、肥力退化的原因．提出了果园平衡施肥的具体指标和方法以及应重点注意的几个问题。     

耿马县耕地土壤养分现状及施肥对策

在2006年测土配方施肥试点项目中,对耿马县耕地土壤养分进行了一次全面调查,其结果,与1984年土壤普查相比,耿马县耕地土壤养分除碱解氮大幅度增加外,土壤有机质,全氮速效磷,速效钾普遍下降。根据土壤养分现状和大量田间试验参数,提出了增施有机肥和磷钾肥,控制氮肥用量,补施微肥,积极推广测土配方施肥新技术等施肥对策。     

土壤养分配方施肥的研究

根据土壤养分含量数据，确定土壤综合地力，并据此预测目标产量，依据养分平衡原理，提出了配方施肥的数学模型。同时通过田间试验，验证了模型的正确性     

浅论土壤的养分平衡原理在农业施肥中的应用

本文分析了土壤养分与植物生长的关系以及各种营养元素的相互作用效应，论述了土壤的养分平衡及其调控，为农业施肥提供了理论依据．     

玉米肥料田间试验

为了获取玉米最佳施肥量、施肥比例、施肥时期和施肥方法;筛选、验证土壤养分测试方法,建立施肥指标体系,掌握各个施肥作物数量,基、追肥分配比例,施肥时期和方法;摸清土壤养分校正系数、土壤供肥能力、作物养分吸收量和肥料利用率等基本参数。     

城固县土壤养分现状与利用对策

通过野外调查采样、土壤养分化验,查清了城固县土壤养分现状、分布、面积等基本情况,对比、评价测土配方施肥实施五年来与五年前及1982年土壤普查结果土壤养分变化情况,提出了今后耕地培肥利用技术措施。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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