Effect of nitrogen rate and fertilizer nitrogen source on physiology, yield, grain quality, and nitrogen use efficiency in corn
| Autor: | D. K. Biswas, Bao-Luo Ma |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
chemistry.chemical_element 04 agricultural and veterinary sciences Plant Science Horticulture Photosynthesis 01 natural sciences Nitrogen Calcium ammonium nitrate chemistry.chemical_compound Corn stover chemistry Agronomy Yield (chemistry) 040103 agronomy & agriculture Grain quality 0401 agriculture forestry and fisheries Ammonium Agronomy and Crop Science Stover 010606 plant biology & botany |
| Zdroj: | Canadian Journal of Plant Science. 96:392-403 |
| ISSN: | 1918-1833 0008-4220 |
| DOI: | 10.1139/cjps-2015-0186 |
| Popis: | A two-year (2010–2011) field experiment was undertaken to examine the effect of nitrogen (N) rate (0, 100, 150, and 200 kg N ha−1) and N source (urea, calcium ammonium nitrate; ammonium sulphate) on canopy reflectance, chlorophyll pigments, photosynthesis, yield, grain quality, and N-use efficiency in corn. However, the physiological observations were made only in 2011. We found that stover biomass was unaffected by higher N rate beyond 150 kg N ha−1 in both years. Higher N rates did not provide a yield advantage as compared to 150 kg N ha−1 in 2010, but the highest grain yield was produced with 200 kg N ha−1 in 2011. The higher grain yield by N application was attributed to a greater kernel size in both years. Corn stover [N] was found to increase with increasing N rates in both years. Kernel [N] only responded to the high N rate in 2010. There was no change in the kernel density as affected by N rate in both years. An increased N addition resulted in a decrease in both N-uptake efficiency and agronomic-N use efficiency in both years. There was an inconsistent effect of N source on yield and N use efficiency indices in the corn over two years. |
| Databáze: | OpenAIRE |
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