Production and nutrition of irrigated Tanzania guinea grass in response to nitrogen fertilization
The objective of this study was to evaluate the effects of nitrogen (N) fertilization in the four seasons of the year on forage production, nitrate (NO3) in the sap, total N in the forage and relative chlorophyll index (SPAD reading) in the leaves of irrigated Panicum maximum cv. Tanzania grass, est...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Zootecnia
2014-05-01
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| Series: | Revista Brasileira de Zootecnia |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000500238&lng=en&tlng=en |
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| author | Maria Celuta Machado Viana Inêz Pereira da Silva Francisco Morel Freire Mozart Martins Ferreira Édio Luiz da Costa Maria Helena Tabim Mascarenhas Matheus Ferreira França Teixeira |
| author_facet | Maria Celuta Machado Viana Inêz Pereira da Silva Francisco Morel Freire Mozart Martins Ferreira Édio Luiz da Costa Maria Helena Tabim Mascarenhas Matheus Ferreira França Teixeira |
| author_sort | Maria Celuta Machado Viana |
| collection | DOAJ |
| description | The objective of this study was to evaluate the effects of nitrogen (N) fertilization in the four seasons of the year on forage production, nitrate (NO3) in the sap, total N in the forage and relative chlorophyll index (SPAD reading) in the leaves of irrigated Panicum maximum cv. Tanzania grass, establishing their critical ranges. In addition, we evaluated the ability to predict forage production based on NO3 in the sap, total N in the forage and relative chlorophyll index. The soil in the experimental area was classified as an Oxisol (Red-Yellow Latosol) with a clayey texture. Annual rates of N (0, 200, 400 and 800 kg ha-1) in the form of urea were the treatments tested. Irrigation was performed through a conventional spray system. The NO3 content in the sap and the relative chlorophyll index were measured in leaves using a portable meter with NO3 selective electrode and the SPAD-502 portable chlorophyll meter device, respectively. Tanzania guinea grass was very responsive to N fertilization, except in the winter. The critical ranges of the SPAD reading proved to be more adequate for monitoring the nutritional state of N of Tanzania guinea grass in the different seasons of the year than the NO3content in the sap and the total N content in the dry matter. Use of the chlorophyll meter is more advantageous than the use of the portable meter with an nitrate selective electrode for predicting the nutritional status of Tanzania guinea grass. |
| first_indexed | 2024-12-14T13:42:16Z |
| format | Article |
| id | doaj.art-556353d7663341e9bacdc70a18b56ba9 |
| institution | Directory Open Access Journal |
| issn | 1806-9290 |
| language | English |
| last_indexed | 2024-12-14T13:42:16Z |
| publishDate | 2014-05-01 |
| publisher | Sociedade Brasileira de Zootecnia |
| record_format | Article |
| series | Revista Brasileira de Zootecnia |
| spelling | doaj.art-556353d7663341e9bacdc70a18b56ba92022-12-21T22:59:25ZengSociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia1806-92902014-05-0143523824310.1590/S1516-35982014000500003S1516-35982014000500238Production and nutrition of irrigated Tanzania guinea grass in response to nitrogen fertilizationMaria Celuta Machado VianaInêz Pereira da SilvaFrancisco Morel FreireMozart Martins FerreiraÉdio Luiz da CostaMaria Helena Tabim MascarenhasMatheus Ferreira França TeixeiraThe objective of this study was to evaluate the effects of nitrogen (N) fertilization in the four seasons of the year on forage production, nitrate (NO3) in the sap, total N in the forage and relative chlorophyll index (SPAD reading) in the leaves of irrigated Panicum maximum cv. Tanzania grass, establishing their critical ranges. In addition, we evaluated the ability to predict forage production based on NO3 in the sap, total N in the forage and relative chlorophyll index. The soil in the experimental area was classified as an Oxisol (Red-Yellow Latosol) with a clayey texture. Annual rates of N (0, 200, 400 and 800 kg ha-1) in the form of urea were the treatments tested. Irrigation was performed through a conventional spray system. The NO3 content in the sap and the relative chlorophyll index were measured in leaves using a portable meter with NO3 selective electrode and the SPAD-502 portable chlorophyll meter device, respectively. Tanzania guinea grass was very responsive to N fertilization, except in the winter. The critical ranges of the SPAD reading proved to be more adequate for monitoring the nutritional state of N of Tanzania guinea grass in the different seasons of the year than the NO3content in the sap and the total N content in the dry matter. Use of the chlorophyll meter is more advantageous than the use of the portable meter with an nitrate selective electrode for predicting the nutritional status of Tanzania guinea grass.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000500238&lng=en&tlng=enchlorophyllNO3 in the sapPanicum maximumSPADtotal N content |
| spellingShingle | Maria Celuta Machado Viana Inêz Pereira da Silva Francisco Morel Freire Mozart Martins Ferreira Édio Luiz da Costa Maria Helena Tabim Mascarenhas Matheus Ferreira França Teixeira Production and nutrition of irrigated Tanzania guinea grass in response to nitrogen fertilization Revista Brasileira de Zootecnia chlorophyll NO3 in the sap Panicum maximum SPAD total N content |
| title | Production and nutrition of irrigated Tanzania guinea grass in response to nitrogen fertilization |
| title_full | Production and nutrition of irrigated Tanzania guinea grass in response to nitrogen fertilization |
| title_fullStr | Production and nutrition of irrigated Tanzania guinea grass in response to nitrogen fertilization |
| title_full_unstemmed | Production and nutrition of irrigated Tanzania guinea grass in response to nitrogen fertilization |
| title_short | Production and nutrition of irrigated Tanzania guinea grass in response to nitrogen fertilization |
| title_sort | production and nutrition of irrigated tanzania guinea grass in response to nitrogen fertilization |
| topic | chlorophyll NO3 in the sap Panicum maximum SPAD total N content |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000500238&lng=en&tlng=en |
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