文档介绍：JIANGXI AGRICULTURAL UNIVERSITY本科毕业论文
题目: 施氮量对金优458干物质运转与氮肥利用的影响

学院: 农学院
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专业: 农学
年级: 06级
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二0一一年五月
辣黑艇畅周袋小迷线键涵岭拆宛潦廖淄哇苛录颗狐卫啃渊见导导屯企礁恃农学专业毕业论文农学专业毕业论文
中文摘要
为研究施氮量对超级杂交稻品种金优458的干物质转运与氮肥利用的影响, 于2010年3月27日在江西农业大学科技园进行试验。设置 6个氮肥处理水平,分别0N、1N、2N、3N、4N和5N 表示。水稻各处理的施氮量分别为 0、120 kg/hm2、150 kg/hm2、170 kg/hm2、195 kg/hm2和 225kg/hm2;结果表明:水稻产量随着施氮量的增加而增加,但是当施氮量为170kg/hm2时,,穗数随着氮肥施用量增加而增加。而水稻抽穗期干物质积累量先从低到高,再从高到低。而抽穗期干物质转运对籽粒贡献率先从低到高,再从高到低。而氮肥农学效率之间的变化不大,氮素吸收量随氮肥用量增加而增加,氮肥偏生产力随氮肥用量增加而降低。综上所述,籽粒产量和单位面积穗数是影响氮素积累及氮素吸收利用效率的重要影响因子,对氮素利用吸收效率的影响比较大。
关键词:水稻;合理施氮量;干物质转运;氮肥利用
杠准后渡涪求彝板露章堤结舅喻献汁替苇涧氦则维坦篮骂廓季挎唤侦锥邵农学专业毕业论文农学专业毕业论文
Nitrogen bu 458 dry matter of goid with the influence of nitrogen use operaion
Abstract:Nitrogen application rate for the study of super hybrid rice Jinyou 458 transport of dry matter and nitrogen utilization in March 27, 2010 Backstreet experimental station in the pilot test within the card. Set six nitrogen fertilizer levels, respectively, and 5N said. Nitrogen in all treatments of rice were 0、120 kg/hm2、150 kg/hm2、170 kg/hm2、195 kg/hm2 and 225kg/hm2; The results showed that: the amount of rice yield with the increase of nitrogen, but when the nitrogen application rate was 170kg/hm2, the yield of , panicle number increased with increasing nitrogen fertilizer. The dry matter accumulation of rice heading stage start low to high, then high to low. The contribution to grain dry matter remobilization heading first from low to high, then high to low. The agronomic efficiency of N changed little between, nitrogen uptake increased with nitrogen fertilizer, nitrogen fertilizer with nitrogen partial factor productivity increases. In conclusion, spikes per unit area grain yield and nitrogen accumulation and nitrogen affect the efficiency of absorption of important factors, the absorption efficiency of nitrogen use is relatively large.
Key words:Rice ; Reasonable fetilizer; Dry matter operation; Nitrogen use
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