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内容来自论文无忧网 www.paper51.com 目录 copyright paper51.com 摘要·········································································3 内容来自论文无忧网 www.paper51.com 关键词·······································································3 内容来自论文无忧网 www.paper51.com 1.油菜生产的现状及研究背景···················································3 paper51.com 1.1 油菜的生产现状···························································3 copyright paper51.com 1.2 研究背景·································································3 内容来自www.paper51.com 2.材料和方法·································································4 内容来自www.paper51.com 2.1 供实品种·································································4 copyright paper51.com 2.2 实验田基本情况···························································4 copyright paper51.com 2.3 实验设计·································································4 内容来自论文无忧网 www.paper51.com 表1因素水平及相应编码 ······················································4 内容来自论文无忧网 www.paper51.com 表2各个处理每个小区（15m2）的处理方法······································5 http://www.paper51.com 2.4 田间管理·································································6 paper51.com 2.5 数据处理·································································6 内容来自论文无忧网 www.paper51.com 3 结果及分析·································································6 内容来自论文无忧网 www.paper51.com
3.1不同处理对油菜生育期的影响···············································6 内容来自www.paper51.com 3．2各因素对油菜经济性状的影响··············································6 copyright paper51.com 3.2.1密度对经济性状的影响···················································6 paper51.com 3.2.2尿素对经济性状的影响···················································7 内容来自www.paper51.com 3.2.3普钙对经济性状的影响···················································7 paper51.com 3.2.4硫酸钾对经济性状的影响·················································7 内容来自www.paper51.com 3.2.5尿素施用方法对经济性状的影响···········································7 内容来自www.paper51.com 3.3不同处理对油菜产量的影响·················································8 内容来自www.paper51.com
3.3.1极差分析结果···························································8 paper51.com
3.3.2方差分析及多重比·······················································8 内容来自论文无忧网 www.paper51.com 3.3.2.1密度水平间比较·······················································8 内容来自www.paper51.com 3.3.2.2尿素水平间比较·······················································8 内容来自论文无忧网 www.paper51.com 4小结 ·····································································9 内容来自论文无忧网 www.paper51.com 表3各处理生育期及一致性调查················································10 http://www.paper51.com 表4各处理经济性状考种······················································11 内容来自www.paper51.com
表5不同密度水平对经济性状的影响············································12 copyright paper51.com 表6不同尿素水平对经济性状的影响············································13 paper51.com
表7不同普钙水平对经济性状的影响············································14 http://www.paper51.com
表8不同硫酸钾水平对经济性状的影响··········································15 内容来自www.paper51.com 表9不同尿素施用方法水平对经济性状的影响····································16 http://www.paper51.com 表10小区产量·······························································17 内容来自www.paper51.com
表11极差分析结果···························································17 paper51.com 表12正交设计方差分析表(随机区组模型) ·····································18 内容来自www.paper51.com 表13各个处理间差异显著性检验 Duncan多重比较·······························18 copyright paper51.com 表14各因素水平间差异显著性检验:Duncan多重比较·····························19 内容来自论文无忧网 www.paper51.com 参考文献····································································20 内容来自www.paper51.com 致谢········································································21 内容来自www.paper51.com
英文摘要及关键词····························································21 http://www.paper51.com 1 油菜生产的现状及研究背景 paper51.com 1.1油菜的生产现状 paper51.com 油菜是当前世界上重要的油料作物之一。随着科学技术的不断发展以及油菜育种工作和产品开发的快速发展，使油菜不仅为当前世界上主要的油料作物，还是工业原料作物、蛋白质作物、能源作物和富含高附加值产品作物。近几年来，油菜的产量一直居世界植物油料的前三位，种植面积和总产量居前列的国家有中国、印度、加拿大、澳大利亚、法国和德国。油菜同时也是我国传统的油料作物。考古专家在陕西西半坡发掘出炭化油菜的原始类型—白菜籽和荠菜籽，据测定距今也有7000年。改革开放以来我国的油菜生产发展快速，已成为继我国水稻、小麦、玉米、大豆之后的第五大作物。目前我国的油菜栽培面积和总产量居世界之首，约占世界的1∕3；占全国油料作物产量的1∕2以上。 copyright paper51.com 1.2研究背景 copyright paper51.com 作为我国最主要的油料作物，油菜在保证粮食和油料的安全供应方面有双重的作用。但是目前我国自产的植物油脂只占国内总消费的40%左右，60%的仍需要进口，这在食用植物油脂的安全供给上存在极大的隐患。传统的油菜种植方式也不能满足现代农业生产的需要，投入成本高，同时收入效益低而严重影响到农民种种植油菜的积极性，使得我国近年来油菜种植面积与总产量出现大幅度的波动，油料生产面临严峻 内容来自www.paper51.com 的挑战。研究能提高产量的高产栽培技术越来越迫切。影响油菜产量的因素很多，例 内容来自论文无忧网 www.paper51.com 如种植密度、施肥量、品种、播期、土壤肥力等。从原始的刀耕火种到现在的精准农 内容来自www.paper51.com
业，作物的密度和施肥量的问题都是一个现实的话题，都是一个急需解决的问题。不同的作物，不同的品种以及不同的生态区域，对密度和施肥量的要求各不尽相同，随着社会的发展和品种的不断更新，对油菜的栽培因子也提出了新的要求，只有合理的调节密度，施肥量等栽培因子才能获得较高的产量和优异的品质。 内容来自论文无忧网 www.paper51.com |