Differences in Physiological Age Affect Diagnosis of Nitrogen Deficiencies in Cornfields

• 作 者: J. ZHANG A. M. BLACKMER T. M.
• 机 构: StatisticalConsultingCenter,DepartmentofAgronomy,IowaSoybeanAssociation
• 出 处: 土壤圈：英文版
• 发表日期: 2008年5期
• 关键词: 玉米 叶绿素 氮缺乏 重量年龄 chlorophyll corn （Zea mays L.） nitrogen deficiency physiologi
• 基金项目: project supported by the Iowa Soybean Association, USA through the ISA On-Farm Network^TM and Watershed Programming.ACKNOWLEDGMENTSThe authors are grateful to the late professor Alfred Blackmer, who p

Many studies have shown that chlorophyll meter readings(CMRs) can be used to diagnose deficiencies of nitrogen(N) during the growth of corn(Zea mays L.) in small-plot trials,but there is need to address additional problems encountered when diagnoses are m