目录
摘要Ⅱ
关键词Ⅱ
AbstractⅢ
引言
引言1
1材料与方法2
1.1试验设计 2
1.2测定项目与方法2
1.2.1群体调查2
1.2.2干物质积累、转运以及植株全氮量测定3
1.2.3地面采样与农学参数获取3
1.3数据分析与处理3
2结果与分析3
2.1氮肥和种植密度对小麦不同生育期叶片氮含量的影响3
2.1.1氮肥和种植密度对小麦分蘖期叶片氮含量的影响3
2.1.2氮肥和种植密度对小麦拔节期期叶片氮含量的影响4
2.1.3氮肥和种植密度对小麦孕穗期叶片氮含量的影响5
2.1.4氮肥和种植密度对小麦开花期叶片氮含量的影响6
2.1.5氮肥和种植密度对小麦灌浆期叶片氮含量的影响6
2.2氮肥和种植密度对小麦籽粒蛋白质含量的影响7
3讨论 9
致谢10
参考文献11
氮密互作对小麦产量和品质的影响研究
摘 要
[目的]为了明确小麦产量与品质同步提高的最佳施氮水平和种植密度并制定合理的栽培措施，为小麦优质高产和节本栽培提供理论支持和技术方法。[方法]以扬麦23为试验材料，在大田条件下采用两因素的裂区设计设置3个种植密度（12、18、24万苗/亩）和4个氮肥水平（0、180、240、300kg/hm2），研究了氮密互作对小麦产量以及品质的影响。[结果]结果表明，种植密度和施氮水平均影响小麦产量及品质，但两因素之间的互作效应不显著。施氮水平一定的条件下种植密度对小麦不同生育期叶片含氮量（LNC）和籽粒蛋白质含量（GPC）的影响呈现出单峰曲线的关系；在种植密度一定的条件下随着施氮水平的上升小麦不同生育期LNC和GPC呈上升趋势；当施氮水平和种植密度达到一定数值时，随着施氮水平和种植密度增加小麦不同生育期LNC和GPC下降。在本试验条件下,扬麦23在播期T1（10月30日）中的适宜施氮量和种植密度为300kg/hm2和18万苗/亩;在播期T2（11月10日）中适宜施氮量和种植密度为30 *51今日免费论文网|www.51jrft.com +Q: &351916072& 
0kg/hm2和16万苗/亩。[结论]说明在小麦高产栽培过程中可以通过合理调整氮肥与种植密度，来提升产量及品质。
Effects of Interaction Between Nitrogen Fertilizer and Density on Wheat Yield and Quality
ABSTRACT
[Objectives] This article aims to clarify the optimal nitrogen application level and planting density for the simultaneous improvement of wheat yield and quality, formulate reasonable cultivation measures, and provide a theoretical basis and technical approach for wheat highyield and efficient costsaving cultivation. [Methods] Using Yangmai 23 as a test material, twofactor split zone design were used to set three planting densities (120,000, 180,000, and 240,000 seedlings / mu) and four nitrogen fertilizer levels (0, 180, 240, 300kg / hm2), studied the effect of nitrogentight interaction on wheat yield and quality. [Results] The results showed that planting density and nitrogen application level affected wheat yield and quality, but the interaction between the two factors is not significant. The effects of planting density on the nitrogen content (LNC) and grain protein content (GPC) of wheat at different growth stages under a certain nitrogen application level showed a single peak curve; The rise of wheat LNC and GPC in different growth stages showed an upward trend; When the nitrogen application level and planting density reached a certain value, as the nitrogen application level and planting density increased, LNC and GPC of wheat at different growth stages decreased.Under the experimental conditions, the suitable nitrogen application rate and planting density of Yangmai 23 in the sowing period T1 (October 30) were 300 kg / hm2 and 180,000 seedlings / mu; in the sowing period T2 (November 10) The suitable nitrogen application rate and planting density are 300 kg / hm2 and 160,000 seedlings / mu. [Conclusions] It shows that in the process of highyield wheat cultivation, the nitrogen fertilizer and planting density can be adjusted reasonably to improve the yield and quality.

原文链接：http://www.jxszl.com/nongxue/zwbh/606182.html