tag:blogger.com,1999:blog-52851708793599993582024-02-06T21:18:20.969-08:00ciclo do nitrogêniocarla karina correa rennerhttp://www.blogger.com/profile/12499598523985733024noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-5285170879359999358.post-28555688053190247412012-04-11T18:13:00.001-07:002012-04-11T18:15:26.691-07:00video<div class="separator" style="clear: both; text-align: center;">
<iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.youtube.com/embed/f8UwSYlkBsw?feature=player_embedded' frameborder='0'></iframe></div>carla karina correa rennerhttp://www.blogger.com/profile/12499598523985733024noreply@blogger.com0tag:blogger.com,1999:blog-5285170879359999358.post-78884213835533806412012-04-11T17:44:00.000-07:002012-04-11T17:44:02.781-07:00Ciclo do nitrogênio<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi1mi6I90V9XzuKTM7XNPLsOBQ2fBHYdlp-gjhX_669iZIJhkcaSWWpFULoMDoIxGWP7c47qLbE6eJhwTHdHcn6R6mtPSqXMKyN4ekc3UzGP7ANlu2sCfnmDpxtEhjGQVfsPqkjeN21eX0/s1600/517a%5B1%5D.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="262" qda="true" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi1mi6I90V9XzuKTM7XNPLsOBQ2fBHYdlp-gjhX_669iZIJhkcaSWWpFULoMDoIxGWP7c47qLbE6eJhwTHdHcn6R6mtPSqXMKyN4ekc3UzGP7ANlu2sCfnmDpxtEhjGQVfsPqkjeN21eX0/s320/517a%5B1%5D.jpg" width="320" /></a></div>carla karina correa rennerhttp://www.blogger.com/profile/12499598523985733024noreply@blogger.com0tag:blogger.com,1999:blog-5285170879359999358.post-35998617226619841302012-04-11T17:39:00.004-07:002012-04-11T18:04:06.240-07:00<br />
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">A forma mais conhecida de saída de nitrogênio</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">dos agroecossistemas é a perda por volatilização de amônia</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">do solo; entretanto, um ponto pouco avaliado e quantificado</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">é a perda de amônia pela parte aérea dos vegetais. Neste</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">contexto, conduziu-se um experimento com objetivo de</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">quantificar alterações nas quantidades de nitrogênio, em</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">diferentes estádios de desenvolvimento da cultura do trigo,</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">como indicativo de possíveis perdas de amônia pela parte</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">aérea. O delineamento experimental foi o inteiramente</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">casualizado, num esquema fatorial 2 x 3 (dois níveis de N: 180</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">e 300mg de N vaso</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">e maturidade), com quatro repetições, totalizando 24</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">parcelas. Utilizaram-se vasos contendo 4kg de um Latossolo</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">Vermelho distrófico típico. A fertilização nitrogenada foi</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">realizada com sulfato de amônio marcado a 3% em átomos de</span></strong></div>
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<i><span style="font-family: Times New Roman; font-size: xx-small;"><span style="font-family: Times New Roman; font-size: xx-small;"></span></span><span style="font-family: Georgia, "Times New Roman", serif;"><strong>-1, e três épocas de colheita: pré-antese, pósantese</strong><strong> </strong></span></i><strong> </strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">15</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">nas plantas de trigo, que podem estar relacionadas às perdas</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">de N-NH</span></strong></div>
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<span style="font-family: Georgia, "Times New Roman", serif;"><strong>N. Foram verificadas reduções do N do fertilizante acumulado</strong><strong> </strong></span></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">3</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">pela parte aérea. Essas perdas foram de 25mg vaso</span></strong></div>
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<span style="font-family: Georgia, "Times New Roman", serif;"><strong>-1</strong><strong> </strong></span></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">(aproximadamente 12kg ha</span></strong></div>
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<span style="font-family: Georgia, "Times New Roman", serif;"><strong>-1 de N) e 36mg vaso-1</strong><strong> </strong></span></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">(aproximadamente 18kg ha</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">de fertilização, respectivamente. As maiores perdas ocorreram</span></strong></div>
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<strong><span style="font-family: Georgia, "Times New Roman", serif;">na pós-antese e na maturidade, com 8,4 e 6,8% do N total</span></strong></div>
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<span style="font-family: Georgia, "Times New Roman", serif;"><strong>aplicado para a menor e a maior dose.</strong><strong>-1 de N) no menor e no maior nível</strong></span></div>carla karina correa rennerhttp://www.blogger.com/profile/12499598523985733024noreply@blogger.com0