《氮肥运筹对甬优12号产量和氮素养分吸收的影响__毕业论文》.doc

JIANGXI AGRICULTURAL UNIVERSITY 本 科 毕 业 论 文（设 计）题目：氮肥运筹对甬优12号产量和氮素养分吸收的影响学 院： 国土资源与环境学院姓 名：何石福学 号：专 业：农业资源与环境班 级：资环1001指导教师： 周春火 职称： 副教授 二0 一四 年 五 月目录 摘要 I Abstract II 前言 1 1. 材料与方法 2 1.1 供试品种 2 1.2 试验设计与田间管理 2 1.3 测定项目及方法 3 2. 结果与分析 4 2.1 氮肥运筹对水稻产量的影响 4 2.2 不同氮肥用量对水稻植株养分吸收的影响 4 2.3 不同施肥时期对水稻植株氮素吸收的影响 5 2.4 不同处理对氮肥利用效率差异 6 3. 小结与讨论 6 参考文献 8 致谢 10摘要 本试验以本地品种为对照，选择粳稻品种甬优12号为供试材料，设置5个不同施氮量处理（N00、N13、N16、N19、N22）A、B、C、D、E、F）N16的产量显著高于其他四个处理，氮素积累量以N19最高，显著高于N00和N13，；；；Abstract This test in local varieties, for comparison, select japonica varieties yongyou 12 were used as material, set up five different n application processing (N00, N13, N16, N19, N22) and six different ratio of N (A, B, C, D, E, F), nitrogen management was studied in ningbo optimal yongyou 12 the influence of nitrogen nutrient absorption. Test results show that the treatment of different n application rate, stem, leaf and spike nitrogen uptake and total nitrogen absorption of rice with the increase of n application, N uptake was increased after first decline, the output of N16 is significantly higher than the other four processing, nitrogen accumulation with the highest N19, significantly higher than that of N00 and N13, but no significant difference with other two processing. Different n application experiment under the condition of same N application rate, the proportion of different nitrogen treatment of nitrogen uptake of rice stem, leaf and spike have obvious difference, six processing C has the highest level of production, and significantly higher than that of processing A and D, but no significant difference with the other three processing. The late nitrogen in increased N uptake. Keywords: japonica；；；前言水稻是我国最主要的粮食作物之一，其总产量占全国粮食总产量的50％2010年全球水稻总产量约为6．82025年全球水稻产量必须达到8亿t才能满足世界人口增长的需要。随着现代高产水稻品种的大面积推广应用，氮肥调控在水稻生产中已成为影响其终产量形成的重要因素，其重要性仅次于水分的影响。与此同时在稻田生态系统中，氮素又是水稻生产的重要限制性大量元素，也是人类提高产量的的巨大动力I1]。由于中国传统施肥方式偏爱施用氮肥但又缺乏平衡施肥的技术和环境保护意识，一味的追求产量而滥施氮肥，不仅容易造成氮肥的浪费、增加水稻的生产成本，而且因排水、