摘要
通过田间小区试验,研究不同时期玉米叶片SPAD值与叶绿素、氮含量及产量的相关性,确定SPAD值测定的最佳叶位及时期。结果表明,上位叶SPAD值对氮素的敏感时期顺序为12叶期>10叶期>8叶期;穗位叶SPAD值对氮素的敏感时期顺序为抽雄期>灌浆期>蜡熟期。叶片SPAD值可以很好的反映植株叶绿素和氮含量及产量水平,以某一特定叶片的SPAD值来诊断春玉米氮素营养状况和推荐追肥时期时,10叶期是较为理想的测定时期;作为早期预测玉米产量的指标,12叶期为最佳时期。测定SPAD值方法简便、快捷,不破坏叶片生长,可作为早期预测玉米产量的指标。
AIn the field plot experiments, the relationships of SPAD readings to chlorophyll content, to nitrogen content in maize leaves of different developmental stages and to the yield were of SPAD readings were determined, which could be used to predict the maize sensitive periods of the SPAD spectively. While for the ear readings of lobus leaves to nitrogen were stages studied. The best leaf location and stage production. The results showed that the of 12 leaves, 10 leaves and 8 leaves, releaves, the sensitive periods were stages of tasseling, filling and dough. In addition, the SPAD readings were also suggested to well reflect the chlorophyll content, the total nitrogen content and the maize yield. It was the best stage of 10 leaves in which the leaf SPAD readings could evaluate the nutritional status and recommend the top dressing time. Meanwhile the stage of 12 leaves was the best stage to early predict the maize yield by using the SPAD readings. The methods of measuring the SPAD readings are convenient and not destroying leaf growth, which should be one of the indices to predict maize yield.
出处
《玉米科学》
CAS
CSCD
北大核心
2011年第4期89-92,97,共5页
Journal of Maize Sciences
基金
东北农业大学博士启动基金
东北农业大学创新团队项目(cxt003-3-1)
黑龙江省农科院博士后基金
关键词
春玉米
叶片
SPAD值
叶绿素
全氮
产量
Spring maize
Leaves
SPAD readings
Chlorophyll
Nitrogen
Yield
