Morphogenetic traits and biomass accumulation of Brachiaria brizantha cv. Xaraés subjected to nitrogen doses
The objective of this experiment was to evaluate the morphogenetic traits and biomass accumulation of Brachiaria brizantha cv. Xaraés subjected to doses of N (0, 125, 250, 375 and 500 kg.ha-1 N). The treatments were arranged in a completely randomized design with four replications. Morphogenetic tra...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Zootecnia
2012-08-01
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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=S1516-35982012000800002 |
| _version_ | 1828731112540602368 |
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| author | Welton Batista Cabral Alexandre Lima de Souza Emerson Alexandrino Fábio Luiz Buranelo Toral Emerson Alencar Bonelli Leni Rodrigues de Lima |
| author_facet | Welton Batista Cabral Alexandre Lima de Souza Emerson Alexandrino Fábio Luiz Buranelo Toral Emerson Alencar Bonelli Leni Rodrigues de Lima |
| author_sort | Welton Batista Cabral |
| collection | DOAJ |
| description | The objective of this experiment was to evaluate the morphogenetic traits and biomass accumulation of Brachiaria brizantha cv. Xaraés subjected to doses of N (0, 125, 250, 375 and 500 kg.ha-1 N). The treatments were arranged in a completely randomized design with four replications. Morphogenetic traits and biomass accumulation of dry matter (DM).ha-1 were evaluated. The results were subjected to statistical analysis by grouping the data in two periods, rainy season and throughout the year. Nitrogen doses influenced leaf appearance in the rainy season and throughout the year, with significant increase in leaf elongation during the rainy season, an increase of 56% compared with control. During this period, maximum dose of N (248.1 kg.ha-1) produced 214.49 kg.ha-1.day-1 DM of leaf blade, which was 133% higher than the control. However, the higher N dose in the rainy season resulted in an increase of 137% in the stalk accumulation compared with non-fertilized grass; estimating maximum accumulation of salk of 84.97 kg.ha-1.day-1 of DM for the application of 326.2 kg.ha-1 N. Doses of N also intensified leaf senescence during the rainy season and throughout the year. The control treatment presented 32% less senescence compared with maximum N dose (270.1 kg.ha-1 N) in the rainy season. Forage loss was estimated at 26.08 kg ha-1.day-1 DM at the maximum dose of 295.0 kg.ha-1 N for this period. All variables studied responded positively to N supply in the rainy season. The accumulation of biomass of the plant reached the maximum point with fertilization close to 250 kg.ha-1 N in the rainy season and 375 kg.ha-1 N throughout the year. |
| first_indexed | 2024-04-12T17:41:05Z |
| format | Article |
| id | doaj.art-0e1ee77fd34643428fb87c3089871e19 |
| institution | Directory Open Access Journal |
| issn | 1516-3598 1806-9290 |
| language | English |
| last_indexed | 2024-04-12T17:41:05Z |
| publishDate | 2012-08-01 |
| publisher | Sociedade Brasileira de Zootecnia |
| record_format | Article |
| series | Revista Brasileira de Zootecnia |
| spelling | doaj.art-0e1ee77fd34643428fb87c3089871e192022-12-22T03:22:48ZengSociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia1516-35981806-92902012-08-014181809181510.1590/S1516-35982012000800002Morphogenetic traits and biomass accumulation of Brachiaria brizantha cv. Xaraés subjected to nitrogen dosesWelton Batista CabralAlexandre Lima de SouzaEmerson AlexandrinoFábio Luiz Buranelo ToralEmerson Alencar BonelliLeni Rodrigues de LimaThe objective of this experiment was to evaluate the morphogenetic traits and biomass accumulation of Brachiaria brizantha cv. Xaraés subjected to doses of N (0, 125, 250, 375 and 500 kg.ha-1 N). The treatments were arranged in a completely randomized design with four replications. Morphogenetic traits and biomass accumulation of dry matter (DM).ha-1 were evaluated. The results were subjected to statistical analysis by grouping the data in two periods, rainy season and throughout the year. Nitrogen doses influenced leaf appearance in the rainy season and throughout the year, with significant increase in leaf elongation during the rainy season, an increase of 56% compared with control. During this period, maximum dose of N (248.1 kg.ha-1) produced 214.49 kg.ha-1.day-1 DM of leaf blade, which was 133% higher than the control. However, the higher N dose in the rainy season resulted in an increase of 137% in the stalk accumulation compared with non-fertilized grass; estimating maximum accumulation of salk of 84.97 kg.ha-1.day-1 of DM for the application of 326.2 kg.ha-1 N. Doses of N also intensified leaf senescence during the rainy season and throughout the year. The control treatment presented 32% less senescence compared with maximum N dose (270.1 kg.ha-1 N) in the rainy season. Forage loss was estimated at 26.08 kg ha-1.day-1 DM at the maximum dose of 295.0 kg.ha-1 N for this period. All variables studied responded positively to N supply in the rainy season. The accumulation of biomass of the plant reached the maximum point with fertilization close to 250 kg.ha-1 N in the rainy season and 375 kg.ha-1 N throughout the year.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000800002fertilizationleaf appearancemorphogenesispastures |
| spellingShingle | Welton Batista Cabral Alexandre Lima de Souza Emerson Alexandrino Fábio Luiz Buranelo Toral Emerson Alencar Bonelli Leni Rodrigues de Lima Morphogenetic traits and biomass accumulation of Brachiaria brizantha cv. Xaraés subjected to nitrogen doses Revista Brasileira de Zootecnia fertilization leaf appearance morphogenesis pastures |
| title | Morphogenetic traits and biomass accumulation of Brachiaria brizantha cv. Xaraés subjected to nitrogen doses |
| title_full | Morphogenetic traits and biomass accumulation of Brachiaria brizantha cv. Xaraés subjected to nitrogen doses |
| title_fullStr | Morphogenetic traits and biomass accumulation of Brachiaria brizantha cv. Xaraés subjected to nitrogen doses |
| title_full_unstemmed | Morphogenetic traits and biomass accumulation of Brachiaria brizantha cv. Xaraés subjected to nitrogen doses |
| title_short | Morphogenetic traits and biomass accumulation of Brachiaria brizantha cv. Xaraés subjected to nitrogen doses |
| title_sort | morphogenetic traits and biomass accumulation of brachiaria brizantha cv xaraes subjected to nitrogen doses |
| topic | fertilization leaf appearance morphogenesis pastures |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000800002 |
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