English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

O manejo adequado do solo e a identifica&ccedil;&atilde;o da &eacute;poca de aplica&ccedil;&atilde;o de N podem aumentar, significativamente, a produtividade do arroz de terras altas. Neste contexto, objetivou-se, com este trabalho, avaliar a intera&ccedil;&atilde;o do manejo do solo com a &eacute;poca de aplica&ccedil;&atilde;o de nitrog&ecirc;nio, no desenvolvimento e produtividade da cultura. O delineamento experimental utilizado foi o de blocos ao acaso, em esquema fatorial 5x2, sendo 5 tipos de manejo do solo (arado de aiveca e grade niveladora; grade aradora e grade niveladora; escarificador tipo &ldquo;matabroto&rdquo;; SPD; e &ldquo;Aeromix&rdquo; - equipamento de escarifica&ccedil;&atilde;o superficial) e duas &eacute;pocas de aplica&ccedil;&atilde;o de nitrog&ecirc;nio (todo N na base, sendo 45 kg ha-1 de nitrog&ecirc;nio aplicados com adubadora de tra&ccedil;&atilde;o mec&acirc;nica, 1 dia antes da semeadura do arroz, + 45 kg ha-1 de nitrog&ecirc;nio aplicados no ato da semeadura; e 45 kg ha-1 de nitrog&ecirc;nio aplicados no ato da semeadura + 45 kg ha-1 aplicados no in&iacute;cio do perfilhamento das plantas), com 4 repeti&ccedil;&otilde;es. N&atilde;o houve intera&ccedil;&atilde;o dos fatores, para a vari&aacute;vel estande final de plantas. Nos tratamentos onde houve revolvimento de solo com arado de aiveca e grade, observou-se maior produtividade quando o nitrog&ecirc;nio foi parcelado. Quando o nitrog&ecirc;nio foi aplicado todo no plantio, o tratamento com escarificador tipo &ldquo;matabroto&rdquo; apresentou a maior produtividade, diferindo de todos os outros tratamentos. O plantio convencional (aiveca ou grade) apresentou produtividade semelhante ao SPD, quando se aplicou o N todo no plantio. PALAVRAS-CHAVE: Oryza sativa; plantio direto; plantio convencional; escarifica&ccedil;&atilde;o. Proper soil management and N application time can significantly increase upland rice yield. Thus, the objective of this study was to evaluate the interaction between soil management and nitrogen application time on upland rice development and yield. The experimental design was randomized blocks, in a 5x2 factorial scheme, consisting of five soil management systems (moldboard plow and leveling disc harrow; harrow plow and leveling disc harrow; &ldquo;matabroto&rdquo;-type scarifier; no-tillage; and &ldquo;Aeromix&rdquo; - superficial scarification equipment) and two N application times (all N in the base, being 45 kg ha-1 of N applied with the aid of a mechanical traction fertilizer machine, 1 day before rice sowing, + 45 kg ha-1 of N at sowing; and 45 kg ha-1 of N at sowing + 45 kg ha-1 at the beginning of plant tillering), with 4 repetitions. There was no interaction among factors, concerning final plants stand. For treatments where the soil was plowed by using moldboard plow and disk harrow, yield was higher when the nitrogen was parceled out. When nitrogen was all applied during the planting time, the treatment with the &ldquo;matabroto&rdquo;-type scarifier presented the highest yield, differing statistically from all the other treatments. Conventional tillage yield (moldboard plow or disk harrow) was similar to no-tillage, when all N was applied during the planting time. KEY-WORDS: Oryza sativa; no-tillage; conventional tillage; scarification.

PRODUTIVIDADE DO ARROZ DE TERRAS ALTAS EM FUNÇÃO DO MANEJO DO SOLO E DA ÉPOCA DE APLICAÇÃO DE NITROGÊNIO