不同施氮比例和时期对冬小麦氮素利用的影响  

Effects of Different Proportion and Stage of Nitrogen Application on Nitrogen Utilization in Winter Wheat

作　　者：赵广才[1] 李春喜[2] 张保明[1] 王崇义[1] 

机构地区：[1]中国农业科学院作物育种栽培研究所,北京100081 [2]河南师范大学生物系,河南新乡453002

出　　处：《华北农学报》2000年第3期99-102,共4页Acta Agriculturae Boreali-Sinica

基　　金：国家"九五"重中之重科技攻关项目! (95 - 0 0 1 - 0 2 - 1 4 )

摘　　要：利用15N同位素示踪技术研究不同施肥处理对小麦各器官氮素含量、NDFF(氮素含量来自肥料氮的百分比 )、植株的氮素利用率以及产量和蛋白质含量的影响。结果表明 :在收获期小麦各器官的含氮量为子粒 >叶片 >根系 >叶鞘 >颖壳 ;各器官的NDFF以根系最多 ,其次为子粒和茎秆 ;以增加底肥的比例和分次追肥处理的植株氮素利用率较高 ;以分次追肥处理的产量最高 ;This paper studies the effects of different treatments on nitrogen content in various organs, NDFF (percentage of nitrogen content from nitrogen in fertilizer) of plant, the nitrogen utilizing coefficient of plant, grain yield and protein content in winter wheat by 15 N tracer technique. The main results showed that the nitrogen content in various organs ranked from high to low as follows: grain, leaf, root, sheath and chaff in wheat at harvest stage. The NDFF was the highest in root, the second in grain and culm; the nitrogen utilizing coefficient of plant was higher in treatment E (nitrogen bottom application; additional nitrogen=6∶4) and C (additional nitrogen used in two times). The grain yield was highest in treatment C, and the grain protein content was highest in treatment D (nitrogen bottom application: additional nitrogen=4∶6).

关 键 词：冬小麦 施氮 氮素利用 氮肥 施肥方法 

分 类 号：S512.110.6[农业科学—作物学]