辽宁大白菜的生态分类与分布

辽宁省位于我国东北地区的南部，其东北与吉林省接壤，西北与内蒙古自治区为邻，西南与河北省毗连，以鸭绿江为界河，与朝鲜隔江相望，南濒渤海和黄海，隔海相望为山东半岛。其中，渤海沿岸的滨海平原为辽宁省的大白菜主要产地。大白菜在辽宁省经过200多年的演化与发展，在辽宁省呈四大生态类型分布，具体分布情况如下。     

柳州有机茶生产技术研究与应用

根据有机生产要求，结合柳州市茶叶生产布局与特点，充分利用、整合与开发当地资源，在引进并集成组合应用诱虫灯、黄板、植物源与矿物源农药的同时，引进“以螨治螨”生物防治技术，并在有机茶生产中进行应用研究，制定了通过使用有机肥、采用物理与生物防治技术来控制化学肥料与化学农药使用，有利于保护与改善茶园生态环境，从而实现经济、生态和社会效益的统一。     

市场营销学(续二十五)

1．3．4 诚意合作，共同发展。建立企业与供销商之间的良好关系，必须以诚相待，共同解决供应与销售中存在的问题。一方面提供各种资料与建议，促使采购、收货、营销、会计等部门与供销商加强沟通，改善关系；另一方面，接受并考虑供销商所提的意见和建议，转达企业各部门并保证予以合理解决，从而使企业与供销商共存共荣，共同发展。     

西班牙西北部苹果种质的分析

西班牙是世界上的第15大苹果生产国，其苹果生产中所使用的品种主要靠进口。在上世纪70年代期间，在Galicia建立了地方品种种质库，旨在保护西班牙西北部的地方资源。利用89个形态性状研究了共408个材料，这89个形态性状中有15个是与物候学有关，46个与果实有关，7个与花有关，11个与叶有关，6个与虫有关，4个与病有关。     

马铃薯块茎内源激素变化与块茎增大生长的相关规律

以晋薯２号，紫花白，内薯３号为材料，系统研究了马铃薯生育期间块茎内源激素变化与块茎增大生长的关系，结果表明，ＡＢＡ含量变化与块茎的增大呈显著正相关，与块茎增大速率变化呈极显著的负相关，ＧＡ３，ＩＡＡ，ＣＴＫ含量变化与块茎增大和块式增大的速率变化没有明显的相关性；ＧＡ３／ＡＢＡ，ＩＡＡ／ＡＢＡ，ＣＴＫ／ＡＢＡ的变化与块茎增大呈较显著的负相关，与块茎增大速率变化呈较显著的正相关，生育前期ＧＡ３ＩＡＡ含     

黄瓜若干性状的相关及通径分析

对黄瓜８个亲本及其１６个杂交组合的总产量等１６个性状进行分析，结果表明，总产量与总采瓜数，单瓜日增克数，单瓜重之间呈显著正相关，与枯萎病率呈显著负相关，早期产量与早期采瓜数呈显著正相关，与霜霉病，白粉病病指呈正相关。瓜长、瓜粗，瓜把长等性状与总产量之间相关系数较小，可单独进行选择。     

山东省小麦高产增产优质种植技术及病虫害防治

随着农业科学技术的不断发展，科技成果不断成熟，小麦的种植质量与产量稳步提升。人们在种植技术与生产标准双重因素的影响下，对小麦品质的关注度越加显著。目前，小麦种植过程中的先进理念与技术深受欢迎，并得到了合理应用与广泛推广。以山东省小麦种植为研究背景，详细分析了小麦高产增产优质种植技术与病虫害防治，探讨了小麦高产增产优质种植技术的科学发展因素，阐述了科学预防小麦病虫害与合理施用化肥的措施，为小麦高产增产提供参考。     

农业与生物科学英语的特点及翻译策略分析

<正>自古以来，我国便是传统的农业大国，就耕地面积和人口数量而言，我国以不足世界十分之一的耕地养育了世界约五分之一的人口。保障粮食安全是国家经济发展的重要基础。近年来，随着全球化的发展以及国际交流的增强，我国粮食进口量已经超过一亿吨。发展农业与生物科学技术可以为我国国民经济平稳发展提供保障，有利于人们生产生活水平稳步提升。在当今背景下，农业与生物科学领域前沿的科研成果多以英文形式发表，世界农业与生物科学领域的国际交流会议也以英语为通用语言，所以学习农业与生物科学专业英语势在必行。文章结合《农业与生物科学专业英语》一书，深度探究农业与生物科学英语的特点与翻译策略，推动我国农业与生物科学专业学生英语水平的提升以及农业与生物科学专业高素质语言人才的培养。     

我国种衣剂的研制现状与开发应用前景

介绍了我国研制，开发应用种衣剂与良种包衣技术的历史，重点评价了药肥复配，抗旱，多功能，生物型、超微粉体等类型种衣剂与优质高效成膜剂的功能与作用；展望并预测了国产种衣剂与良种包衣技术的开发应用前景。     

论21世纪中国农业可持续发展：有关理论与实践的讨论

本文讨论了可持续农业的定义与实际含义，对发展与环境，现代农业的功与过，替代还是发展，传统技术与现代科学技术的关系等理论问题进行了探讨了并提出相应的见解。重点是强调生产持续性，经济持续性与生态持续性三者的统一，强调前进而不要后退。本文还探讨了中国农业发展的方向与道路。根据中国农业４５年成就与不足以及临的难题，提出２１世纪目标－实现农业现代化，而集约持续农业是中国式通向农业现代化的具体道路的体现。强调     

INVESTIGATION ON THE DITERMINATION OF LOW-VALENCE TITANIUM(II,III) IN SLAG CONTAINING A HIGH TITANIUM CONTENT

In this article a method is investigated for the determination of low-valence titanium in slag containing a high titanium content. The residue is dissolved using H2SO4-HF-H3PO4 after tMFe, Fe2O3 and the part of FeO are separated from sample with FeCl3-HCl, and NH4 Fe(SO4)2 is added to oxidate low titanium. Then the standard solution of K2Cr2O7 is used to tit-rat Fe2+ in sample solution. The method possesed with a advantage of simple rapid and good repeatability so that it can be used in the roution determination.     

Coagulable protein in potato: Screening method and prospects for breeding

Summary From tubers of 34 varieties of Solanum tuberosum, extracts were prepared and analysed for crude protein and coagulable protein by the Kjeldahl method. Content of coagulable protein was 0.37–1.24%. From the same material, juice was prepared with a juice centrifuge and analysed for coagulable protein by the Kjeldahl and microbiuret method. The average amount of coagulable protein in the juice was 81.8% of the total coagulable protein. The correlation coefficient between coagulable protein in the juice and total coagulable protein was 0.956. The correlation coefficient between Kjeldahl and microbiuret data for coagulable protein in the juice was 0.956. Analysis of tuber juice by the microbiuret method is recommended as a rapid screening technique for coagulable protein.Relationships between protein data of the 34 varieties and earliness, yield and content of dry matter were analysed statistically. Content of coagulable protein in fresh material correlated with content of dry matter (rs=–0.756), yield of fresh potatoes (r=–0.615) and earliness (r=–0.361) but not significantly with yield of dry matter (rs=–0.309). Coagulable protein in dry matter correlated with fresh yield (r=–0.525), but not significantly with content of dry matter (r=–0.260), yield of dry matter (r=–0.131) and earliness (r=–0.054). Path coefficient analysis showed that 67% of the variation in coagulable protein in fresh material was statistically determined by earliness, content of dry matter, fresh yield and content of uncoagulable protein in fresh material, whereas only 34% of the variation in content of coagulable protein in dry matter was determined by these components. A high content of coagulable protein in fresh or dry matter can be combined with early maturity and with high yield of dry matter. Coagulable protein in dry matter seems to be a more suitable criterion of selection than coagulable protein in fresh material.     

微波消解-恒pH滴定法快速测定粮食中的粗蛋白

为建立一种快速测定食品中粗蛋白质的新型分析方法,选择小麦为样品,用硫酸一过氧化氢混合溶液为消解剂,利用微波压力程序加热技术快速消解样品,用甲醛法将NH4 转化为H ,以KOH为标准溶液,用恒pH滴定法进行测定.结果表明:小麦干基粗蛋白的含量在14%～17%之间,RSD1.2%～2.1%(n=6或12).与经典方法对照测定,经F检验和t检验表明两者之间无显著性差异(置信度95%).该法操作简单、快速,试剂用量少,空白值低,工作效率大大提高,结果令人满意.     

凯氏定氮法测定大米中蛋白质的不确定度分析

采用GB/T5009.5-2003第一法,凯氏定氮法测定大米中蛋白质的含量,其测量不确定度来源于样品称量、消化、定容、移取消化液、蒸馏及滴定等过程。通过对各个不确定度分量的计算合成,找出影响测量不确定度的因素,并对各个不确定度分量进行评估,最终分析出样品大米中蛋白质的标准不确定度及扩展不确定度并描述了影响大米蛋白质测定结果各分量对其不确定度的相对贡献。     

不同施氮量对裸燕麦产量品质及叶面硒肥效率的影响

为研究N肥对于裸燕麦产量和品质及硒吸收的影响,从而为冀北坝上裸燕麦高产优质富硒栽培技术提供一定的理论指导。以裸燕麦品种‘坝莜1号’为试验材料,分别在三叶期和拔节期施6个不同量的尿素,并且所有处理在三叶期和拔节期2 个时期、抽穗期和成熟前10 天2 个时期分别喷施相同量的2个型号硒肥。成熟期田间取样,室内测定裸燕麦的经济性状、产量构成、子实产量和生物产量。采用半微量凯氏定氮法测定籽粒粗蛋白含量;采用索氏提取法测定籽粒粗脂肪含量;利用酸水解法测定籽粒粗淀粉含量;利用原子荧光光度计测定籽粒硒含量。随着施N量的增加,裸燕麦的生育期有逐渐延长的趋势,裸燕麦的小穗数、穗粒重、穗数、穗粒数、籽实产量和生物产量以及籽实粗蛋白含量都有先增加后降低的趋势。施N肥增加了裸燕麦对硒肥的吸收,两年均是在三叶期施尿素210 kg/hm2拔节期施尿素240 kg/hm2时籽粒硒含量最高;N肥对于裸燕麦的穗长、粗淀粉、粗脂肪含量没有显著影响(P＞0.05);两年对于裸燕麦的株高和千粒重影响不同,2013 年不同处理对于裸燕麦的株高和千粒重影响都不显著,而2014年有增加的作用。     

Monitoring nitrogen forms in soil/plant systems under different fertilizer managements. A preliminary investigation

A field experiment was carried out on maize (Zea mays, L.) to study the effects of different fertilizer management on nitrogen status in soil and plant response. Three different fertilizers, mineral (MN), mineral plus buffalo manure (MN + BM) and organo-mineral with peat (OMP), were added at the usual (140, 61 and 116 kg ha⁻¹) and the reduced (70, 31 and 58 kg ha⁻¹) rates of N, P and K. respectively. Soil samples were analyzed for N by both the Kjeldahl method and the electro-ultrafiltration technique (EUF). The soil Kjeldahl-N concentrations were scarcely affected by the different fertilizer treatments, while the EUF-N concentrations were closely correlated with the amounts of N added. The EUF also discriminated between the NO₃-N and the sum of the ammonium and the easily extractable organic N forms (EUF-N_org + NH₄). The largest proportions of EUF-Norg + NH₄ were found in the untreated plots and in the plots treated with buffalo manure. The different fertilizer treatments significantly affected grain yield, which ranged from a minimum of 6.3 t ha⁻¹ from the untreated plots, to a maximum of 11.9 t ha⁻¹ from those supplied with 140 kg N, 61 kg P and 116 kg K ha⁻¹ by OMP fertilizer. The highest agronomic efficiency index for N was exhibited in the OMP treatment at the reduced rate. The grain yield was closely correlated with the total extractable EUF-N, but different relationships were found between the rate of N added, the level of EUF-NO,-N in soil and grain yield for the different fertilizer treatments.     

基于凯氏定氮法与杜马斯燃烧法测定土壤全氮的比较研究

氮循环是生物地球化学研究中最重要的课题之一,全氮含量的测定是农业、生物和环境等多领域研究的常规测试项目。凯氏定氮法和杜马斯燃烧法作为常规方法用于土壤全氮含量的测定。实验对10个土壤标准样品进行测定,分别采用凯氏定氮法和杜马斯燃烧法测定其全氮含量,对两种方法的准确性、精密度和相关性进行分析。结果表明：杜马斯燃烧法和凯氏定氮法具有很好的相关性,杜马斯燃烧法精密度高于凯氏定氮法,但在样品氮含量较低时,凯氏定氮法的测定结果更准确。     

化学发光法测定烟叶中的总氮

建立测定烟叶中总氮含量的新方法。烟叶中的含氮化合物经消化后,加碱蒸馏,用硫酸吸收,全部转化为氨态氮,根据NH4+在碱性溶液中能还原ClO ,该反应和化学发光反应ClO?-－Luminol相耦合,降低化学发光强度,从而达到测定NH4+的目的。本方法的检测下限达到10-3mg/kg,线性范围选择0.01～1.5（mg/kg）,加标回收率在87.3%～109.9%之间,RSD＜5%(n=5),完全能满足烟叶中总氮测定的要求。     

冬枣果园土壤非交换态钾的释放动力学

为了研究长期施肥条件下冬枣果园土壤非交换态钾的释放特征,以Ca Cl2和柠檬酸溶液为浸提剂,采用连续提取的方法对枣园土壤的非交换态钾释放动力学进行研究。结果表明,枣园土壤非交换态钾在释放过程中表现出快速释放和缓慢释放2个连续的阶段。快速释放阶段(188 h)的累积释放量占到总释放量的53.6%~59.2%,而在缓慢释放阶段(188~1244 h)的释放量不及总量的一半。在相同时间内,使用柠檬酸溶液浸提时,非交换态钾的释放量明显高于使用Ca Cl2溶液时的释放量。相比之下,冬枣果园土壤非交换态钾的释放量明显高于对照土壤。在5种动力学方程中,幂函数方程是描述冬枣果园土壤非交换态钾释放的最优模型。     

Complexometric extraction based technique for the extraction of 6 Nitro 1 and 2 Azoxynaphthalene 4 Sulfonic acid

A complexometric extraction method of extracting 6 nitro 1 and 2 azoxynaphthalene 4 sulfonic acid in its mother solution is studied. At the room temperature, taking 30(v) trioctylamine(N 235) chloroform solution as an extractant, when the extractant and mother solution volume ratio is 1:1 and extracting 60 minutes, the extraction yield can reach 96.1. Using 12(m) NaOH solution as a strip agent, when the organic phase and strip agent volume ratio is 2:1 and stripping 60 minutes, the strip yield can reach 94.3.