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Cucumis melo is one of the most appreciated and consumed vegetables in the world, however, producing areas have been suffering from increased salinity in irrigation water. Therefore, accesses of melon, from the germplasm bank of the Federal Rural Semi-Arid University (UFERSA), were tested for salinity and the physiological responses of the seedlings were evaluated. For the 24 accesses of C. melo, salinity of 0.06 and 3.45 dS m^-1 was applied. For this, four subsamples of 25 seeds per access were used, which were seeded in polystyrene trays having as a substrate washed and sterilized sand, initially moistened at 50% field capacity. The design was completely randomized in a factorial scheme (two salinity levels and 24 accesses). Salinity affected the physiological quality (germination and mean germination time) of melon seeds, germinating on average 62%, with an average germination time of 4 days, mean height of 10.5 cm and reduction of dry matter accumulation. The saline treatment increased the electrical conductivity (EC) of the soil saturation extract, indicating the presence of stress. The accesses that presented intolerance to salinity were: A35, A24, A41, A31, A09, A28 and A43. The moderately tolerant accesses were: A16, A19, A15, A17, A34, A25, A27, A18, A42. The salinity tolerant accesses were: A45, A08, A37, A50, A14, A36, A07, A39 which may serve as a basis for genetic improvement.

Este trabalho foi desenvolvido com o objetivo de estudar as alterações nas curvas de absorção de nutrientes com uso prolongado da manta, adotando-se o delineamento experimental de blocos casualizados completo, com quatro repetições. Os tratamentos foram dispostos em parcelas subdivididas, sendo as parcelas representadas por duas épocas de retirada do TNT sobre os camalhões de plantio do meloeiro levando em consideração o intervalo de dias após a emissão das flores masculinas, em pelo menos 50 % das plantas da área útil da parcela (T1-8 dias e T2-17 dias), e as sub-parcelas pelas épocas de amostragens das plantas: 13, 20, 27, 34, 41 e 48 DAT. Em cada época as plantas foram analisadas quanto aos teores de N, P, K, Ca e Mg. Pode-se concluir que o uso da manta agrotextil não interferiu na concentração de macronutrientes do meloeiro cantaloupe, apresentando concentrações dentro da faixa adequada sendo decrescente para N, P e K e aumentando ao longo do ciclo para Ca e Mg.