Effect of nitrogen fertilization on yield, grain weight and test weight of early and late corn
Changes in corn cultural management have allowed us to explore the crop capabilities and improve the sustainability of our soils. The objective of this work was to assess the effect of nitrogen fertilization on yield, grain weight, and test weight of corn sown at different dates. The trial was carri...
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| Autores principales: | , , , , |
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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Facultad de Ciencias Agronómicas - UNR
2022
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| Acceso en línea: | https://cienciasagronomicas.unr.edu.ar/index.php/agro/article/view/4 |
| Aporte de: |
| Sumario: | Changes in corn cultural management have allowed us to explore the crop capabilities and improve the sustainability of our soils. The objective of this work was to assess the effect of nitrogen fertilization on yield, grain weight, and test weight of corn sown at different dates. The trial was carried out using a randomized complete block design: three growing seasons (2015-16, 2016-17 and 2018-19), and three sowing dates per growing season. The treatments were three levels of nitrogen: N0 (no added N); N75 (75kg N.ha-1 ), and N150 (150 kg N.ha-1), in V5 –V7. In the evaluated growing seasons, rainfall during the critical period was higher in late corn than in early corn, and average air temperatures were lower. Late corn had the lowest yields (Y). Water availability was the limiting factor. Mean yields (MY) were similar in 2015-16 and 2018-19, but 21% lower in 2016-17 than in 2018-19. In 2015-16 and 2016-17, similar mean yields were obtained with N150 and N75 treatments. N0 showed a significantly lower MY than the other nitrogen levels. In 2018-19, the MY for each of the nitrogen treatments differed significantly from the other levels analyzed. The positive response to nitrogen fertilization was correlated with environmental conditions. Under the evaluated conditions, late corn was a valid option to improve water availability for the crop. Despite the low relative yields obtained, late sowing allowed a better use of resources. |
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