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SOSBAI. Sociedade Sul Brasileira de Arroz Irrigado (2016) Arroz Irrigado: Recomendacaes técnicas da pesquisa para o sul do Brasil. [Irrigated Rice: Technical Recommendations of the Research for Southern Brazil.] SOSBAI, Pelotas, Rio Grande do Sul, Brasil, 200 p.

has been cited by the following article:

  • TITLE: Rice and Barnyardgrass: Water Stress and Initial Establishment

    AUTHORS: José Maria Barbat Parfitt, André Andres, Germani Concenço, Gustavo Mack Teló, Fábio Schreiber, Jaqueline Trombetta da Silva, Ivana Santos Moisinho, Pâmela Andrades Timm

    KEYWORDS: Echinochloa crusgalli, Intermittent Irrigation, Oryza sativa

    JOURNAL NAME: American Journal of Plant Sciences, Vol.8 No.12, November 24, 2017

    ABSTRACT: The present work aimed to evaluate the effect of different water stress levels on the development of both rice and barnyardgrass. The study was established into greenhouse, in completely randomized design, in factorial scheme 2 × 5, with four replications. Factor “A” comprised the plant species (rice cv. BRS Querência, or the weed Echinochloa crusgalli), and factor “B” comprised the water stress levels: (T1) continuous flood (CF); (T2) 0 kPa (saturated soil); (T3) 10 kPa; (T4) 40 kPa; and (T5) 100 kPa. Plant emergence was assessed every day; plant length was measured 30 days after planting. At the end of the experiment, the number of leaves per plant, root length and shoot and root dry mass were determined. Our data supply evidence that under moderate water stress, up to approximately 40 kPa, rice tends to perform better than barnyardgrass in the initial stage of crop growth, when under equivalent plant density. However, barnyardgrass is usually present in much higher plant density than crop plants in fields traditionally cropped with rice. Thus, efficient control of barnyardgrass should be accomplished to avoid damage to rice crop by competition for environmental resources.