Organic No-Till: N Release From Roll-Killed Hairy Vetch and Crimson Clover.
go.ncsu.edu/readext?277100
en Español / em Português
El inglés es el idioma de control de esta página. En la medida en que haya algún conflicto entre la traducción al inglés y la traducción, el inglés prevalece.
Al hacer clic en el enlace de traducción se activa un servicio de traducción gratuito para convertir la página al español. Al igual que con cualquier traducción por Internet, la conversión no es sensible al contexto y puede que no traduzca el texto en su significado original. NC State Extension no garantiza la exactitud del texto traducido. Por favor, tenga en cuenta que algunas aplicaciones y/o servicios pueden no funcionar como se espera cuando se traducen.
Português
Inglês é o idioma de controle desta página. Na medida que haja algum conflito entre o texto original em Inglês e a tradução, o Inglês prevalece.
Ao clicar no link de tradução, um serviço gratuito de tradução será ativado para converter a página para o Português. Como em qualquer tradução pela internet, a conversão não é sensivel ao contexto e pode não ocorrer a tradução para o significado orginal. O serviço de Extensão da Carolina do Norte (NC State Extension) não garante a exatidão do texto traduzido. Por favor, observe que algumas funções ou serviços podem não funcionar como esperado após a tradução.
English
English is the controlling language of this page. To the extent there is any conflict between the English text and the translation, English controls.
Clicking on the translation link activates a free translation service to convert the page to Spanish. As with any Internet translation, the conversion is not context-sensitive and may not translate the text to its original meaning. NC State Extension does not guarantee the accuracy of the translated text. Please note that some applications and/or services may not function as expected when translated.
Collapse ▲Organic No-till: N release from roll-killed hairy vetch and crimson clover.
By: Mary Parr, Dr. Chris Reberg-Horton, and Dr. Julie Grossman
In collaboration with the Organic Grains Research group, Mary Parr, graduate student in the Soil Science department at NCSU, has been investigating nitrogen (N) fixation and release in a system involving roll-killed winter legume cover crops followed by no-till organic corn. She has quantified the total amount of N in the biomass of hairy vetch, crimson clover and Austrian winter pea at the time of roll-kill, and is in the process of calculating the portion of this N coming from the atmosphere vs. the soil. Beginning with corn planting in May 2009, she monitored the decomposition and release of fixed N from hairy vetch and crimson clover mulches that had been roll-killed. One of the novel ways in which she quantified N released from the decomposing mulch was by using “resin probes” inserted into the soil that collected the N released by mulch over a two week period. She found that the hairy vetch plants contained up to 195 lb N per acre by mid May, and crimson clover between 120 and 140 lb N per acre. As a rolled surface mulch, N from the hairy vetch cover crop was made available more quickly to the corn crop – with peak availability between 2 and 6 weeks, but the crimson clover N did not become available until later in the season – between 6 and 10 weeks after planting. This experiment was conducted at the Tidewater station in Plymouth NC, and the Piedmont station in Salisbury NC and it will be repeated on both sites in the coming year.