›› 2009, Vol. 21 ›› Issue (3): 0-302.

• 论文 •    

水稻氮素及钾素叶位分布特点及诊断叶位研究

郭 彬,林义成,丁能飞,傅庆林 *,刘 琛   

  1. 浙江省农业科学院环境资源与土壤肥料研究所,浙江杭州31002
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-05-25 发布日期:2009-05-25

Distribution of nitrogen and potassium in different leaf positions and relationship with nitrogen and potassium diagnosis in rice(Oryza saliva)

GUO Bin;LIN Yi—cheng;DING Neng-fei;FU Qing-lin *;LIU Chen   

  1. Institute of Environment,Resources,Soil and Fertilizer,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-05-25 Published:2009-05-25

摘要: 利用盆栽试验研究水稻拔节期、孕穗期不同叶位氮素及钾素时空分布特征,并进行了不同叶位含氮、钾量与总叶片含氮、钾量以及施氮、钾量的线性相关分析。结果表明,拔节期叶位间含氮量由上而下逐级增加,孕穗期叶位间含氮量由上而下逐级递减,两个时期内叶位间含钾量均表现为由上而下逐级递减。增施氮能减少叶位间氮素的差异,但增施钾叶位间含钾量的差异无显著变化。相关分析表明,拔节期水稻顶1叶适合作为氮营养的诊断叶片,孕穗期水稻顶3叶或顶4叶适合作为氮营养的诊断叶片,顶1叶适合作为拔节期、孕穗期钾营养的诊断叶片。

关键词: 水稻, 叶位, 营养诊断

Abstract: Pot experiments with rice were conducted to investigate the nitrogen(N)and potassium (K)distributions in different leaf positions and growth stages.Linear correlation analysis between N,K contents in different leaves,total N,K
content in leaves and the amount of N,K application wore also studied.The results showed that N content increased from upper leaf position to lower position in jointing stage,while the reVerse was obvious in booting stage.K content decreased from upper leaf positiontolower positionin both jointing and booting stages.The differences of N content among leaf positions were investigated following the increasing amount of N application.However,no significant change was observed in K content among different leaf positions when the amount of N appfication was increased.According to the correlation analysis,the first position of rice leaf was suitable for N diagnosis in jointing stage,and the third or the fourth position of rice leaf was suitable for N diagnosis in booting stage.The first position of rice leaf was suitable for K diagnosis in both jointing and booting stages.

Key words: rice, leafposition, nutrition diagnosis