氮肥和DPC用量对棉花叶片叶绿素含量和SPAD值的影响  

Effects of Nitrogen Application Rates and DPC Sparing Doses on Content of Chlorophyll and SPAD Value in Leaf of Cotton(Gossypium hirsutum L.)

作　　者：马宗斌[1] 房卫平[2] 谢德意[2] 李伶俐[1] 朱伟[1] 

机构地区：[1]河南农业大学农学院,郑州450002 [2]河南省农业科学院经济作物研究所,郑州450002

出　　处：《棉花学报》2009年第3期224-229,共6页Cotton Science

基　　金：农业科技跨越计划项目(2006年第13项);河南省科技攻关项目(0624100018)

摘　　要：在大田条件下研究了氮肥和缩节胺(DPC)用量对中早熟棉花品种豫杂35和早熟品种银山1号叶片叶绿素含量、SPAD值的影响。结果表明,随着施氮量或DPC用量的增加,两个品种的叶片叶绿素含量和SPAD值均呈增加趋势。叶片叶绿素含量和SPAD值呈正相关关系,但生育后期叶绿素含量的下降明显快于SPAD值,表现为吐絮期的叶绿素含量显著低于盛铃期,而吐絮期的SPAD值与盛铃期差异不显著。因此,在DPC化控条件下,仍可使用SPAD值进行棉花叶色诊断,但应注意生育后期SPAD值与叶绿素含量的不同趋势。Effects of nitrogen application rates and mepiquat chloride（DPC） sparing doses on content of chlorophyll and SPAD value in leaf of earlier-middle spring cotton variety Yuza 35 and short-season one Yinshan 1 were studied.The results showed that content of chlorophyll and SPAD value in leaf of two cotton varieties increased with enhancing nitrogen application rates or DPC sparing doses.There were significantly positive correlations between SPAD value and content of chlorophyll in leaf in most growth stages.But content of chlorophyll in leaf decreased more quickly than SPAD value in later growth stage,i.e.,the content of chlorophyll in leaf in boll opening stage decreased significantly than that in full bolling stage,and the SPAD value in boll opening stage decrease slightly than that in full bolling stage.Therefore,SPAD value is still efficient to conduct leaf color threshold when DPC is applied to cotton,but attention should be paid to the different tendency of content of chlorophyll and SPAD value in later growth stage of cotton.

关 键 词：棉花 氮肥 DPC 叶绿素含量 SPAD值 

分 类 号：S562[农业科学—作物学]