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Características de plantas de arroz e a habilidade competitiva com plantas daninhas

Authors: Balbinot Jr., A.A.; Fleck, N.G.; Barbosa Neto, J.F.; Rizzardi, M.A.;

Características de plantas de arroz e a habilidade competitiva com plantas daninhas

Abstract

O potencial competitivo das plantas pelos recursos de crescimento do meio é afetado por suas características morfofisiológicas. Ainda não há consenso sobre qual característica da planta de arroz irrigado é mais importante na determinação da sua capacidade competitiva com as plantas daninhas. Este trabalho teve como objetivo identificar características da planta de arroz irrigado por inundação que mais contribuam na competitividade da cultura. Nesse sentido, conduziu-se um experimento em campo no ano agrícola 2000/01, em Cachoeirinha-RS, com oito genótipos de arroz, cultivados na presença ou ausência do cultivar de arroz EEA 406, simulando infestação de arroz-vermelho. Foram avaliadas características das plantas de arroz na condição de ausência de competição e, por ocasião da colheita, determinou-se a redução de rendimento de grãos para cada genótipo, decorrente da competição com as plantas daninhas. Por meio de análise de regressão linear múltipla e correlação linear simples, determinou-se que a habilidade dos cultivares em sombrear o solo aos 60 dias após semeadura (DAS) foi a variável mais relacionada com o potencial competitivo, e que essa característica esteve especialmente associada com o acúmulo de massa aérea pelas plantas de arroz aos 15 DAS.

Keywords

soil coverage, sombreamento do solo, Competition, Growth rate, competição, interference, interferência, velocidade de crescimento, Arroz irrigado, Red rice, red rice, growth rate, arroz-vermelho, Interference, competition, Erva daninha, Soil coverage

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    23
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
23
Average
Top 10%
Average
Green
gold