Canopy reflectance, stalk sugar and juice yields in specialty corn hybrids as affected by nitrogen management strategies

BACKGROUND The newly developed sugarcorn is conceived for dual‐purpose use as a potential biofuel feedstock and a high‐energy silage crop. Its agronomic traits are, however, not fully appraised under the umbrella of nitrogen (N) management and with canopy reflectance indicator. A 3‐year field study...

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Bibliographic Details
Published in:Journal of the science of food and agriculture 2020-02, Vol.100 (3), p.1080-1091
Main Authors: Ma, Baoluo , Zheng, Zhiming M
Format: Article
Language:English
Subjects:
Agricultural management
Agricultural production
Agrochemicals
Agronomic crops
Agronomy
Biofuels
Canopies
Corn
corn silage
Crop Production
Crop yield
Environmental conditions
Fruit and Vegetable Juices - analysis
Genotypes
Grain
Hybrids
Juices
Measurement methods
N management
NDVI
Nitrogen
Nitrogen - analysis
Nitrogen - metabolism
Normalized difference vegetative index
Organic chemistry
Plant Stems - chemistry
Plant Stems - genetics
Plant Stems - growth & development
Reflectance
Silage
Silage - analysis
stalk sugar concentration
Sucrose
sucrose yield
Sugar
sugarcorn
Sugars - chemistry
Sugars - metabolism
Zea mays - chemistry
Zea mays - genetics
Zea mays - growth & development
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Summary:BACKGROUND The newly developed sugarcorn is conceived for dual‐purpose use as a potential biofuel feedstock and a high‐energy silage crop. Its agronomic traits are, however, not fully appraised under the umbrella of nitrogen (N) management and with canopy reflectance indicator. A 3‐year field study was conducted to examine the responses of silage biomass, stalk sugar concentration, sugar and juice yields to various N applications; and determine the quantitative relationships between canopy reflectance, expressed as the normalized difference vegetation index (NDVI), and stalk sucrose or other sugar measures in a dual‐purpose sugarcorn (cv. ‘CO384xC103’), in comparison with a commercial leafy silage‐specific hybrid (cv. ‘Pride A5892G3 EDF’). RESULTS The moderate N rate, 125 kg ha−1, produced similar stalk sucrose, silage and grain yields, compared to the high rate (250 kg N ha−1), regardless of application methods. The NDVI signatures measured at the V8–V10 stage exhibited significant (P 
ISSN:0022-5142
1097-0010
DOI:10.1002/jsfa.10113