玉米叶片光反射率与其它氮胁迫测量法的比较ＴｒａｃｙＭ．Ｂｌａｃｋｍｅｒ等地下水硝酸盐浓度的增加已导致改进Ｎ肥管理的需要，特别是在玉米产区更是如此。改善玉米施Ｎ的一些方法已使用多年，这包括各种测定土壤有效Ｎ含量和玉米组织Ｎ浓度的分析程序。这些技术都存在... Comparison of Measurement of Leaf Light Reflectance and Other Nitrogen Stress in Maize. Increases in nitrate concentrations in groundwater such as Blackmer have led to the need to improve N fertilizer management, especially in maize. Some methods to improve N application in maize have been used for many years and include various analytical procedures for determining soil available N content and corn tissue N concentration. These techniques exist ...