N transfer from green manures to lettuce in an intercropping cultivation system
dc.contributor.author | Sakai, Rogério Haruo | |
dc.contributor.author | Ambrosano, Edmilson José | |
dc.contributor.author | Negrini, Ana Clarissa Alves | |
dc.contributor.author | Trivelin, Paulo Cesar Ocheuze | |
dc.contributor.author | Schammass, Eliana Aparecida | |
dc.contributor.author | Melo, Paulo César Tavares de | |
dc.date.accessioned | 2024-05-14T18:59:02Z | |
dc.date.available | 2024-05-14T18:59:02Z | |
dc.date.issued | 2011 | |
dc.description.abstract | The aim of this work was to evaluate the transfer of N via biological nitrogen fixation from green manures to intercropped lettuce using the 15N abundance method. The treatments consisted of lettuce with black oats, lettuce with cowpea, lettuce with white lupin and monocropped lettuce (control). Green manures were sown at two different times including the following: 60 days before transplanting of lettuce seedlings and simultaneous to transplanting of lettuce seedlings. N transfer was estimated using the natural 15N abundance method. It was observed that lettuce intercropped with green manures reached the same fresh mass of monocropped lettuce when the green manures were sown at the same time as the vegetables were planted. However, when the green manures were sown previously, the fresh mass of the monocropped lettuce was higher, and independent of the sowing time of green manures, the monocropped lettuce reached a higher dry mass. White lupin and cowpea transferred higher amounts of N regardless of sowing time, and the C:N ratio of white lupin to cowpea was lower compared to black oats. Intercropping with white lupin, cowpea and black oat transferred 18%, 17% and 7% of N, respectively, to lettuce. O objetivo deste trabalho foi estudar a transferência do nitrogênio de adubos verdes para alface em cultivo consorciado, através da técnica da abundância natural de 15N. Os tratamentos foram: alface em monocultivo (testemunha), alface consorciado com aveia-preta, com feijão-caupi e com tremoço-branco, em duas épocas de semeadura dos adubos verdes: 60 dias antes e no transplante das mudas de alface. Observou-se que a alface consorciada com adubos verdes adquiriu a mesma massa fresca das alfaces solteiras quando a semeadura do adubo verde foi simultânea com o plantio da mesma; no entanto quando os adubos verdes foram semeados com 60 dias de antecedência as alfaces solteiras obtiveram maior massa fresca ; independentemente da época de semeadura as alfaces solteiras alcançaram maior massa seca; o tremoço-branco e o caupi transferiram maior quantidade de N para a alface, independentemente de sua época de semeadura; a relação C:N do feijão-caupi e tremoço-branco foram menores que a da aveia-preta; o cultivo consorciado de tremoço-branco, caupi e a aveia-preta transferiram 18%, 17% e 7% de N para a alface; e que em cultivo consorciado há transferência de N proveniente da fixação biológica do nitrogênio (FBN) dos adubos verdes tremoço-branco e caupi para a alface. | |
dc.identifier.doi | 10.4025/actasciagron.v33i4.6766 | |
dc.identifier.issn | 1807-8621 | |
dc.identifier.other | S1807-86212011000400017-scl | |
dc.identifier.uri | https://repositorio-aptaregional.agricultura.sp.gov.br/handle/123456789/1043 | |
dc.relation.ispartof | Acta Scientiarum. Agronomy | |
dc.subject | Avena strigosa Schreb | |
dc.subject | Lupinus albus L | |
dc.subject | Lactuca sativa L. | |
dc.subject | Vigna unguiculata (L.) Walp. | |
dc.subject | abundância natural de 15N | |
dc.subject | Avena strigosa Schreb | |
dc.subject | Lupinus albus L. | |
dc.subject | Lactuca sativa L. | |
dc.subject | Vigna unguiculata (L.) Walp. | |
dc.subject | natural 15N abundance | |
dc.title | N transfer from green manures to lettuce in an intercropping cultivation system | |
dc.type | Artigos | |
oaire.citation.endPage | 686 | |
oaire.citation.issue | 4 | |
oaire.citation.startPage | 679 | |
oaire.citation.volume | 33 |
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