Sources and levels of nitrogen fertilization on microbial activity and fertility in soil cropped with Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Acta Scientiarum. Agronomy (Online) |
Texto Completo: | http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3946 |
Resumo: | Pastures usually lose their yield potential and re-growth energy in a few years, most often due to the lack of nitrogen fertilization. The objective of this study was to verify the effect of sources and levels of nitrogen (N) fertilization, under microbial activity (carbon of microbial biomass and carbon released as CO2) and fertility of soil cropped with Brachiaria brizantha cv. Xaraés. The experimental design was randomized, organized under a 3 x 4 factorial scheme, with three nitrogen sources (urea, ammonium sulfate and Ajifer-L40) and four nitrogen levels (0, 100, 200 and 400 kg ha-1), analyzed on two depths (0 - 0,10 e 0,10-0,20 m), with 3 replications. The higher levels of N doses, the 0 - 0.10 m depths, reduced the values of pH, MO, K+, Ca2+, Mg2+, SB and V%. Ajifer and urea resulted in higher values of Ca2+, in the depths of 0.10 – 0.20 m, and the values of Mg2+ and SB exhibited high values with the doses of 100 and 200 kg ha-1 levels of N. The higher levels of ammonium sulfate resulted in soil acidification. Soil carbon loss, due to the high microbial activity, could be the result of metabolic stress caused by soil acidification. The application of 100 kg ha-1 of nitrogen was the best fertilizing level, considering the smaller loss of soil carbon by microbial activity. |
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Sources and levels of nitrogen fertilization on microbial activity and fertility in soil cropped with Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946Fontes e doses de adubação nitrogenada na atividade microbiana e fertilidade do solo cultivado com Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946Ajifermicrobial biomassC mineralizationammonium sulfateureaAjiferbiomassa microbianamineralização do Csulfato de amônioureiaPastures usually lose their yield potential and re-growth energy in a few years, most often due to the lack of nitrogen fertilization. The objective of this study was to verify the effect of sources and levels of nitrogen (N) fertilization, under microbial activity (carbon of microbial biomass and carbon released as CO2) and fertility of soil cropped with Brachiaria brizantha cv. Xaraés. The experimental design was randomized, organized under a 3 x 4 factorial scheme, with three nitrogen sources (urea, ammonium sulfate and Ajifer-L40) and four nitrogen levels (0, 100, 200 and 400 kg ha-1), analyzed on two depths (0 - 0,10 e 0,10-0,20 m), with 3 replications. The higher levels of N doses, the 0 - 0.10 m depths, reduced the values of pH, MO, K+, Ca2+, Mg2+, SB and V%. Ajifer and urea resulted in higher values of Ca2+, in the depths of 0.10 – 0.20 m, and the values of Mg2+ and SB exhibited high values with the doses of 100 and 200 kg ha-1 levels of N. The higher levels of ammonium sulfate resulted in soil acidification. Soil carbon loss, due to the high microbial activity, could be the result of metabolic stress caused by soil acidification. The application of 100 kg ha-1 of nitrogen was the best fertilizing level, considering the smaller loss of soil carbon by microbial activity.As pastagens geralmente perdem seu potencial produtivo e vigor de rebrota nos primeiros anos, frequentemente associada à falta de adubação nitrogenada. O objetivo deste foi verificar o efeito de fontes e doses de adubação nitrogenada na atividade microbiana (carbono da biomassa microbiana e carbono do CO2 liberado) e na fertilidade do solo cultivado com Brachiaria brizantha cv. Xaraés. O delineamento experimental foi em blocos casualizados, em arranjo fatorial 3 x 4, envolvendo três fontes de nitrogênio (uréia, sulfato de amônio e Ajifer-L40) e quatro doses de nitrogênio (0, 100, 200 e 400 kg ha-1), nas profundidades 0 - 0,10 e 0,10 - 0,20 m, com três repetições. O aumento nas doses de nitrogênio, na camada 0,0 a 0,10 m de profundidade, reduziu os valores de pH, MO, K+, Ca2+, Mg2+, SB e V%. O Ajifer e a uréia elevaram os valores de Ca2+ na camada 0,10 - 0,20 m, e as doses de 100 e 200 kg ha-1 aumentaram os valores de Mg2+ e SB. Em doses elevadas o sulfato de amônio acidificou o solo. A perda de carbono pela elevada atividade microbiana pode estar relacionado ao estresse metabólico devido à acidificação do solo. A aplicação de 100 kg ha-1 de nitrogênio acarretou as menores perdas de carbono pela atividade microbiana.Universidade Estadual de Maringá2011-02-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/394610.4025/actasciagron.v33i2.3946Acta Scientiarum. Agronomy; Vol 33 No 2 (2011); 361-367Acta Scientiarum. Agronomy; v. 33 n. 2 (2011); 361-3671807-86211679-9275reponame:Acta Scientiarum. Agronomy (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3946/3946Delbem, Flavia CristinaScabora, Márcia HelenaSoares Filho, Cecílio ViegaHeinrichs, RegesCrociolli, Carlos AlbertoCassiolato, Ana Maria Rodriguesinfo:eu-repo/semantics/openAccess2022-11-23T18:38:02Zoai:periodicos.uem.br/ojs:article/3946Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgronPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/oaiactaagron@uem.br||actaagron@uem.br|| edamasio@uem.br1807-86211679-9275opendoar:2022-11-23T18:38:02Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Sources and levels of nitrogen fertilization on microbial activity and fertility in soil cropped with Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946 Fontes e doses de adubação nitrogenada na atividade microbiana e fertilidade do solo cultivado com Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946 |
title |
Sources and levels of nitrogen fertilization on microbial activity and fertility in soil cropped with Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946 |
spellingShingle |
Sources and levels of nitrogen fertilization on microbial activity and fertility in soil cropped with Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946 Delbem, Flavia Cristina Ajifer microbial biomass C mineralization ammonium sulfate urea Ajifer biomassa microbiana mineralização do C sulfato de amônio ureia |
title_short |
Sources and levels of nitrogen fertilization on microbial activity and fertility in soil cropped with Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946 |
title_full |
Sources and levels of nitrogen fertilization on microbial activity and fertility in soil cropped with Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946 |
title_fullStr |
Sources and levels of nitrogen fertilization on microbial activity and fertility in soil cropped with Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946 |
title_full_unstemmed |
Sources and levels of nitrogen fertilization on microbial activity and fertility in soil cropped with Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946 |
title_sort |
Sources and levels of nitrogen fertilization on microbial activity and fertility in soil cropped with Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946 |
author |
Delbem, Flavia Cristina |
author_facet |
Delbem, Flavia Cristina Scabora, Márcia Helena Soares Filho, Cecílio Viega Heinrichs, Reges Crociolli, Carlos Alberto Cassiolato, Ana Maria Rodrigues |
author_role |
author |
author2 |
Scabora, Márcia Helena Soares Filho, Cecílio Viega Heinrichs, Reges Crociolli, Carlos Alberto Cassiolato, Ana Maria Rodrigues |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Delbem, Flavia Cristina Scabora, Márcia Helena Soares Filho, Cecílio Viega Heinrichs, Reges Crociolli, Carlos Alberto Cassiolato, Ana Maria Rodrigues |
dc.subject.por.fl_str_mv |
Ajifer microbial biomass C mineralization ammonium sulfate urea Ajifer biomassa microbiana mineralização do C sulfato de amônio ureia |
topic |
Ajifer microbial biomass C mineralization ammonium sulfate urea Ajifer biomassa microbiana mineralização do C sulfato de amônio ureia |
description |
Pastures usually lose their yield potential and re-growth energy in a few years, most often due to the lack of nitrogen fertilization. The objective of this study was to verify the effect of sources and levels of nitrogen (N) fertilization, under microbial activity (carbon of microbial biomass and carbon released as CO2) and fertility of soil cropped with Brachiaria brizantha cv. Xaraés. The experimental design was randomized, organized under a 3 x 4 factorial scheme, with three nitrogen sources (urea, ammonium sulfate and Ajifer-L40) and four nitrogen levels (0, 100, 200 and 400 kg ha-1), analyzed on two depths (0 - 0,10 e 0,10-0,20 m), with 3 replications. The higher levels of N doses, the 0 - 0.10 m depths, reduced the values of pH, MO, K+, Ca2+, Mg2+, SB and V%. Ajifer and urea resulted in higher values of Ca2+, in the depths of 0.10 – 0.20 m, and the values of Mg2+ and SB exhibited high values with the doses of 100 and 200 kg ha-1 levels of N. The higher levels of ammonium sulfate resulted in soil acidification. Soil carbon loss, due to the high microbial activity, could be the result of metabolic stress caused by soil acidification. The application of 100 kg ha-1 of nitrogen was the best fertilizing level, considering the smaller loss of soil carbon by microbial activity. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-02-16 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3946 10.4025/actasciagron.v33i2.3946 |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3946 |
identifier_str_mv |
10.4025/actasciagron.v33i2.3946 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3946/3946 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual de Maringá |
publisher.none.fl_str_mv |
Universidade Estadual de Maringá |
dc.source.none.fl_str_mv |
Acta Scientiarum. Agronomy; Vol 33 No 2 (2011); 361-367 Acta Scientiarum. Agronomy; v. 33 n. 2 (2011); 361-367 1807-8621 1679-9275 reponame:Acta Scientiarum. Agronomy (Online) instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
instname_str |
Universidade Estadual de Maringá (UEM) |
instacron_str |
UEM |
institution |
UEM |
reponame_str |
Acta Scientiarum. Agronomy (Online) |
collection |
Acta Scientiarum. Agronomy (Online) |
repository.name.fl_str_mv |
Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM) |
repository.mail.fl_str_mv |
actaagron@uem.br||actaagron@uem.br|| edamasio@uem.br |
_version_ |
1799305906463178752 |