冬小麦不同时期追施尿素的效果  

EFFECT OF UREA APPLICATION AS TOP DRESSING AT DIFFERENT GROWTH STAGES OF WINTER WHEAT

作　　者：尚兴甲 王梅芳 张兰稳 孔繁华 王淑杰 陈建中 

机构地区：[1]冀州市土壤肥料工作站,河北冀州053200 [2]冀州镇农技站,河北冀州053200

出　　处：《核农学报》2003年第6期485-487,共3页Journal of Nuclear Agricultural Sciences

摘　　要：运用15N对冬小麦不同追肥时期的效果、氮肥利用率及氮素在秸秆、籽粒中的分配、土壤残留、挥发损失进行了研究。结果表明 :拔节期追肥 1次 ,再追施穗肥 1次效果最好 ;前期追肥秸秆对氮的利用率高 ,但籽粒对氮的利用率低 ;后期追肥籽粒对氮的利用率高 ,而秸秆对氮的利用率低 ;前后期结合追肥比 1次追肥土壤氮素残留量高 ,损失较少。The study of urea dressing with isotope 15N at different growth stages of winter wheat was conducted at Jizhou City. The N use efficiency, N distribution in straw and seeds, N remain in soil and N volatilization loss was studied. The results showed that high N use efficiency with twice urea dressing for winter wheat was found, once at shooting stage,another at filling stage. The straw had higher N use efficiency with urea dressing at shooting stage, and the seeds had higher N use efficiency with urea dressing at filling stage. N remained more in soil and lost less with urea dressing twice than once.

关 键 词：冬小麦 尿素 追肥时期 氮肥利用率 产量 氮15同位素示踪技术 土壤残留 氮素平衡 

分 类 号：S512.11[农业科学—作物学] S143.14