14
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Disponibilidade hídrica e germinação de sementes de cebola (Allium cepa L.) Translated title: Water availability and germination of onion seeds (Allium cepa L.)

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Objetivando verificar a influência do teor de água do substrato na germinação de sementes de cebola (Allium cepa L.), conduziu-se um ensaio sob condições de ambiente de laboratório. Os efeitos de cinco níveis de água no substrato solo x areia (3:1), 20, 40, 60, 80 e 100% da capacidade de retenção foram avaliados através da porcentagem de emergência no 14° dia da semeadura e pesos da matéria verde e seca das plântulas normais. Para tanto, 200 sementes do cultivar Pira Ouro por tratamento, em quatro repetições de 50, foram semeadas a 1,5 cm de profundidade, mantendo-se constantes os níveis de água no substrato. Os resultados possibilitaram concluir que os níveis de umidade do solo indicados para germinação de sementes de cebola são de 40% e 60% da capacidade de retenção do substrato, por possibilitarem uma melhor emergência, peso da matéria verde e seca das plântulas.

          Translated abstract

          One essay was conducted under laboratory conditions, in order to verify the influence of substrate water content on the germination of onion (Allium cepa L.) seeds. The effect of five water levels in the medium soil x sand (3:1) - 20, 40, 60, 80 and 100% retention capacity-were evaluated through the emergence percentage 14 days after seedling and the weight of fresh and dry matters of normal seedlings. For that purpose, 200 treated seeds of Pira Ouro cultivar were sown 1.5 cm deep in four replicátions of 50, with a constant water content in the medium. The best results showed that the soil moisture levels suggested for the germination of onion seeds were 40% to 60% of the substrate retention capacity, once they provide better emergence, weight of the fresh and dry matters of seedlings.

          Related collections

          Most cited references15

          • Record: found
          • Abstract: not found
          • Article: not found

          Regraspara análise de sementes

            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found
            Is Open Access

            Manipulation of Seed Water Relations Via Osmotic Priming to Improve Germination Under Stress Conditions

            For annual crops, the time from planting to seedling establishment is a crucial phase in the production cycle. Uniformity and percentage of emergence of direct-seeded crops can have a major impact on final yield and quality, particularly for vegetables (84). Techniques of precision planting to achieve desired plant populations depend on a high probability of successful establishment for each seed planted (26). Furthermore, increasing use of expensive hybrid seed has placed additional emphasis on the performance of each seed planted. The soil environment often, however, is not conducive to rapid germination and seedling growth. Physical stresses, such as extreme temperatures, excess or deficit of water, salinity, or soil crusting; and biological stresses, including pathogens and insects, can all adversely affect germination and seedling growth. These problems are compounded by the increased susceptibility of plants to many of these stresses during germination and emergence. It is not surprising, therefore, that there have been many attempts to devise presowing treatments to improve seed performance in the field. The wide range of such treatments has been thoroughly reviewed and categorized by Heydecker and Coolbear (38).
              Bookmark
              • Record: found
              • Abstract: not found
              • Book: not found

              Fisiologia da semente

                Bookmark

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                sa
                Scientia Agricola
                Sci. agric. (Piracicaba, Braz.)
                São Paulo - Escola Superior de Agricultura "Luiz de Queiroz" (Piracicaba )
                1678-992X
                December 1994
                : 51
                : 3
                : 486-489
                Affiliations
                [1 ] EPAGRI
                [2 ] UNESP
                [3 ] Universidade Federal de Pelotas Brazil
                [4 ] USP
                Article
                S0103-90161994000300018
                10.1590/S0103-90161994000300018
                1bab9647-bebc-4a60-a874-bd35641a2598

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0103-9016&lng=en
                Categories
                AGRICULTURE, MULTIDISCIPLINARY

                General agriculture
                seeds,water,germination,onion,sementes,água,germinação,cebola
                General agriculture
                seeds, water, germination, onion, sementes, água, germinação, cebola

                Comments

                Comment on this article