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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (7): 147-151.

所属专题： 水稻

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

基于水稻不同生育期叶绿素值推荐追施氮量的研究初报

陈晓群1,张学军1,白建忠2,郝中华3,李广成4,冒海军5   

  • 收稿日期:2009-11-26 修回日期:2009-12-13 出版日期:2010-04-05 发布日期:2010-04-05

Preliminary Study Recommend Top dressed Nitrogen Quantity Based on Chlorophyll SPAD of Rice in Different Growth Stage

  • Received:2009-11-26 Revised:2009-12-13 Online:2010-04-05 Published:2010-04-05

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摘要：

以水稻叶绿仪诊断值为基础，推荐合理追施氮肥为目标，采用多点田间试验与水稻叶绿素诊断诊断相结合方法，在水稻生育期内对不同施氮处理叶绿素值进行诊断研究，提出基于叶绿素诊断值的合理推荐施氮量，为宁夏灌区水稻合理追施氮肥提供科学依据。研究结果表明：水稻不同生育期叶片叶绿素值与施氮量呈正相关，随着施氮量增加，叶绿素值也增加；水稻叶绿素值与产量呈正相关，尤其在水稻孕穗期、抽穗期前期表现明显，各试验点水稻孕穗期叶绿素SPAD值与产量相关系数R2范围在0.6696 ～0.9194之间； 提出基于水稻不同生育期叶绿素诊断值的氮肥推荐追施量，在分蘖～拔节期间，叶绿素SPAD值要达到32～35 之间，追施氮量在30～60 kg/hm2；在拔节～孕穗前期，叶绿素SPAD值要达到35～40之间，追施氮量在45～75 kg/hm2，在孕穗后期，叶绿素SPAD值控制在40～45之间，追施氮量在15～30 kg/hm2，若叶绿素SPAD值超过40～45之间，可以免追穗肥。

关键词: 柴胡, 柴胡, 根腐病, 致病菌, 生物学特性

Abstract:

The study object was Recommend Top-dressed Nitrogen Quantity Based on Chlorophyl SPAD diagnosis of Rice (CSDR) in Different Growth Stage. The different experiment site and CSDR integrate were adopted. The study on CSDR to different nitrogen treatment in Different Growth Stage, reasonable recommend Top-dressed Nitrogen Quantity Based on CSDR was put forward in order to provide scientific proof to reasonable application nitrogen in irrigation area of Ningxia. The study result show that it is close relationship between CSDR in Different Growth Stage and different application nitrogen treatment, CSDR enhanced with application nitrogen increased. The CSDR and yield were close relationship, correlation coefficient (R2)were 0.6696 ～0.9194 before booting stage in different experiment site. Reasonable recommend Top-dressed Nitrogen Quantity Based on CSDR was put forward, application nitrogen was 30～60 kg/hm2when CSDR was 32～35 during tillering –elongation stage, application nitrogen was 45～75 kg/hm2 when CSDR was 35～40 before booting stage, application nitrogen was15～30 kg/hm2when CSDR was40～45 after booting stage, no application nitrogen when CSDR more than 40～45.