摘要
研究以许昌市东郊小麦田为试验区,实测小麦冠层光谱数据,并采集相应样地的土壤样本,测定样本中氮、磷、钾的含量以及pH,对比分析它们之间的相关关系。结果表明,样地冬小麦生长正常,开花期、灌浆期光谱反射率变化较大;土壤pH较为稳定,有利于冬小麦生长发育;铵态氮含量与冬小麦冠层光谱在起身期到拔节期变化方向相反,在拔节期到抽穗期变化方向相同,在抽穗期到灌浆期相关关系比较复杂;当有效磷含量较为稳定时,对小麦冠层光谱无明显影响,当其含量较低时,与小麦冠层光谱变化方向相反;速效钾含量不稳定,与小麦冠层光谱相关性比较复杂。
Based on the test samples of wheat in Eastern suburbs of Xuchang,canopy spectral reflectance of winter wheat was observed continuously.The soil samples were collected to analyze the N,P,K contents and PH in Soil.The correlation between them were comparatively studied.The result showed that experimental winter wheat growed normally.The spectral reflectance in flowering stage and filling stage changed greatly.The soil PH value was stable and good for the growth of winter wheat.The variation direction of Ammonium N content and canopy spectral of winter wheat from standing to heading stage was different,but that from heading to jointing stage was the same.The correlation between heading and filling stage was complex.When the content of available P was stable,it had little influence on canopy spectral reflectance of winter wheat.When the content was low,the variation direction was different.The content of available K was not stable.The wheat canopy spectral correlation was complex.
出处
《湖北农业科学》
北大核心
2013年第23期5714-5717,共4页
Hubei Agricultural Sciences
基金
河南省科技攻关重点项目(112102310537
122102310420)
河南省教育厅自然科学研究计划项目(2009B180023
2011B170013)
关键词
冬小麦
冠层
光谱
环境因子
相关分析
winter wheat
canopy
spectral
environment factors
correlation analysis
