Nitrogen nutrition index and corn yield at different management and nitrogen fertilization levels
The objective of this study was to evaluate the relationship between N nutrition indices and corn grain yield in two management levels, under different rates of nitrogen fertilization. The nutrition indices relative leaf chlorophyll content (RCC), sufficiency index (SI), leaf and plant N content, and accumulated N in leaf and plant were evaluated. Indices were determined in different vegetative development stages and during flowering. The relationship between indices and crop yield was determined in field conditions, with different rates of nitrogen fertilization, during two years, under two levels of management: medium, nonirrigated, and with rates of N between 0 and 150 kg ha-1; and high, irrigated and with rates of N between 0 and 300 or between 0 and 240 kg ha-1. The relationship between mineral N content and total leaf N content was assessed in greenhouse. Nutrition indices show variable performance in predicting corn grain yield, and were influenced by the vegetative development stage and by the management levels. The RCC and SI indices were highly associated with grain yield. The performance of the indices is better in high‑level crop management.
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Pesquisa Agropecuaria Brasileira
2011
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rev-pab-br-article-96492014-05-23T19:09:43Z Nitrogen nutrition index and corn yield at different management and nitrogen fertilization levels Índices nutricionais de N e produtividade de milho em diferentes níveis de manejo e de adubação nitrogenada Rambo, Lisandro da Silva, Paulo Regis Ferreira Strieder, Mércio Luiz da Silva, Adriano Alves Sangoi, Luís Vieira, Vladirene Macedo Zea mays; chlorophyll meter; N efficiency use; plant indicators; management levels Zea mays; clorofilômetro; eficiência de uso do N; indicadores de planta; níveis de manejo The objective of this study was to evaluate the relationship between N nutrition indices and corn grain yield in two management levels, under different rates of nitrogen fertilization. The nutrition indices relative leaf chlorophyll content (RCC), sufficiency index (SI), leaf and plant N content, and accumulated N in leaf and plant were evaluated. Indices were determined in different vegetative development stages and during flowering. The relationship between indices and crop yield was determined in field conditions, with different rates of nitrogen fertilization, during two years, under two levels of management: medium, nonirrigated, and with rates of N between 0 and 150 kg ha-1; and high, irrigated and with rates of N between 0 and 300 or between 0 and 240 kg ha-1. The relationship between mineral N content and total leaf N content was assessed in greenhouse. Nutrition indices show variable performance in predicting corn grain yield, and were influenced by the vegetative development stage and by the management levels. The RCC and SI indices were highly associated with grain yield. The performance of the indices is better in high‑level crop management. O objetivo deste trabalho foi avaliar a relação entre índices nutricionais de N e a produtividade de grãos de milho, em dois níveis de manejo, sob diferentes doses de adubação nitrogenada. Avaliaram-se os índices nutricionais: teor relativo de clorofila na folha (TRC), índice de suficiênca (IS), teores de N na folha e na planta, e quantidades acumuladas de N na folha e na planta. Os índices foram determinados em diferentes estádios de desenvolvimento vegetativo e durante o espigamento. A relação dos índices com a produtividade foi deteminada em campo, com doses variáveis de adubação nitrogenada, durante dois anos, sob dois níveis de manejo: médio, não irrigado e com doses de N entre 0 e 150 kg ha-1; e alto, irrigado e com doses de N entre 0 e 300 ou entre 0 e 240 kg ha-1. A relação dos teores de N mineral com o teor de N total na folha foi avaliada em casa de vegetação. Os índices nutricionais apresentaram desempenho variável na predição da produtividade do milho e foram influenciados pelo estádio de desenvolvimento das plantas e pelo nível de manejo. Os índices TRC e IS estiveram mais fortemente associados à produtividade. O desempenho dos índices é melhor sob alto nível de manejo da cultura. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira CNPq 2011-06-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/9649 Pesquisa Agropecuaria Brasileira; v.46, n.4, abr. 2011; 390-397 Pesquisa Agropecuária Brasileira; v.46, n.4, abr. 2011; 390-397 1678-3921 0100-104x por https://seer.sct.embrapa.br/index.php/pab/article/view/9649/6293 https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/9649/4900 https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/9649/5875 |
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Rambo, Lisandro da Silva, Paulo Regis Ferreira Strieder, Mércio Luiz da Silva, Adriano Alves Sangoi, Luís Vieira, Vladirene Macedo |
| spellingShingle |
Rambo, Lisandro da Silva, Paulo Regis Ferreira Strieder, Mércio Luiz da Silva, Adriano Alves Sangoi, Luís Vieira, Vladirene Macedo Nitrogen nutrition index and corn yield at different management and nitrogen fertilization levels |
| author_facet |
Rambo, Lisandro da Silva, Paulo Regis Ferreira Strieder, Mércio Luiz da Silva, Adriano Alves Sangoi, Luís Vieira, Vladirene Macedo |
| author_sort |
Rambo, Lisandro |
| title |
Nitrogen nutrition index and corn yield at different management and nitrogen fertilization levels |
| title_short |
Nitrogen nutrition index and corn yield at different management and nitrogen fertilization levels |
| title_full |
Nitrogen nutrition index and corn yield at different management and nitrogen fertilization levels |
| title_fullStr |
Nitrogen nutrition index and corn yield at different management and nitrogen fertilization levels |
| title_full_unstemmed |
Nitrogen nutrition index and corn yield at different management and nitrogen fertilization levels |
| title_sort |
nitrogen nutrition index and corn yield at different management and nitrogen fertilization levels |
| description |
The objective of this study was to evaluate the relationship between N nutrition indices and corn grain yield in two management levels, under different rates of nitrogen fertilization. The nutrition indices relative leaf chlorophyll content (RCC), sufficiency index (SI), leaf and plant N content, and accumulated N in leaf and plant were evaluated. Indices were determined in different vegetative development stages and during flowering. The relationship between indices and crop yield was determined in field conditions, with different rates of nitrogen fertilization, during two years, under two levels of management: medium, nonirrigated, and with rates of N between 0 and 150 kg ha-1; and high, irrigated and with rates of N between 0 and 300 or between 0 and 240 kg ha-1. The relationship between mineral N content and total leaf N content was assessed in greenhouse. Nutrition indices show variable performance in predicting corn grain yield, and were influenced by the vegetative development stage and by the management levels. The RCC and SI indices were highly associated with grain yield. The performance of the indices is better in high‑level crop management. |
| publisher |
Pesquisa Agropecuaria Brasileira |
| publishDate |
2011 |
| url |
https://seer.sct.embrapa.br/index.php/pab/article/view/9649 |
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