Nitrogen Concentration and Dry-Matter Accumulation in Maize Crop: Assessing Maize Nitrogen Status with an Allometric Function and a Chlorophyll Meter
Nitrogen Concentration and Dry-Matter Accumulation in Maize Crop: Assessing Maize Nitrogen Status with an Allometric Function and a Chlorophyll Meter
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玉米作物中的氮浓度和干物质积累：利用异速生长功能和叶绿素计评估玉米氮状态
DOI：
10.1080/00103624.2012.675393
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
V. Reddy
中科院分区：
文献类型：
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作者：
Yang Yang;D. Timlin;D. Fleisher;S. Lokhande;J. Chun;Soo;K. Staver;V. Reddy
确定玉米植株获得最大生长所需的最佳氮（N）含量的能力对于作物管理非常重要。结果表明，氮含量随地上生物量积累量（W）的增加而下降：[N] = 3.4W-0.37。本研究的目的是评估叶绿素计读数与最佳氮含量关系的适用性，为玉米全株氮素状况诊断提供一种工具，而无需测量氮含量。生物量的拍摄和特定器官，氮浓度，叶绿素计测量特定的叶片进行了测量，在几个地点和几年。氮浓度的测量表明，全株氮状况可以代表的氮浓度的最顶端充分展开的叶片。氮浓度和叶绿素计测量的最上部展开的叶片之间的定量关系的建立和验证。
The ability to determine the optimal nitrogen (N) content in maize plants needed to obtain maximum growth is important to the management of the crop. It has been shown that N content declines as a function of aboveground biomass accumulation (W): [N] = 3.4W–0.37. The goal of this study is to evaluate the applicability of relating chlorophyll meter readings with the optimal N content relationship to provide a tool for whole-plant N-status diagnosis in maize without the necessity of measuring N content. Biomass of shoot and specific organs, N concentration, and chlorophyll meter measurement of specific leaves were measured over several sites and years. Nitrogen-concentration measurements indicated that whole-plant N status can be represented by the N concentration of the topmost fully expanded leaf. A quantitative relationship between N concentration and chlorophyll meter measurement on the uppermost expanded leaf was established and validated.
M.Bhargava,A.Joseph,Y.Li,S.Pang,I.Goldberg,E.Setter,M.A.Donovan,R.Zarnegar,G.A.Michalopoulos,T.Nakamura：“分散因子和肝细胞生长因子：生物活性的比较
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