Marcha de absorção de nutrientes em meloeiro ‘goldex’ fertirrigado

Abstract

RESUMONo presente trabalho objetivou-se determinar a marcha de acumulação de macro e de micronutrientes cultivado sob fertirrigação. O experimento foi realizado em área pertencente à Empresa Ecofértil Brazilian Journal of DevelopmentBraz. 12655Agropecuária LTDA localizada no município de Aracati (CE). O experimento foi instalado em delineamento de blocos casualizados com 9 tratamentos, correspondentes a 9 períodos de avaliação 14, 21, 28, 35, 42, 49, 56, 63, 70 dias após transplantio com quatro repetições. Em intervalos de sete em sete dias, as plantas foram coletadas e separadas em folha, caule, fruto e semente para fins da determinação de N, P, K, Ca, Mg, S, Fe, Mn, B, Zn e Cu, para a quantificação dos totais acumulados destes nutrientes. Na ocasião da coleta de planta, uma amostra de solo foi coletada em cada parcela para a determinação dos nutrientes. De acordo com os resultados, o acúmulo de massa seca nas partes reprodutivas foi maior que nas partes vegetativas, sendo os frutos os órgãos de maior acúmulo de massa seca. Já a marcha de acúmulo de nutrientes seguiu a seguinte ordem:K>Ca>N>Mg>P>S>Fe>Cu>B>Zn>Mn. Palavras-chave:Cucumis melo L., nutrição mineral, melão amarelo, acúmulo de massa seca. ABSTRACTThe objective of this study was to determine the progression of macro and micronutrients accumulation of the melon cultivated under fertirrigation. The experiment was carried out in an area belonging to the Company Ecofértil Agropecuária Ltda located in the city of Aracati (CE). The experiment was carried out in a randomized block design with 9 treatments, corresponding to 9 evaluation periods 14, 21, 28, 35, 42, 49, 56, 63, 70 days after transplanting (DAT) with four replications. The useful part for the purpose of collection was constituted of 8 plants becoming the four centers of each row. At intervals of seven days, the plants were collected and separated into leaf, stem, fruit and seed for the determination of N, P, K, Ca, Mg, S, Fe, Mn, B, Zn and Cu, for The quantification of accumulated totals of these nutrients. At the time of plant collection, a soil sample was collected in each plot to determine the nutrients. According to the results, the accumulation of dry mass in the reproductive parts was higher than in the vegetative parts, the fruits being the organs

Marcha de absorção de nutrientes e crescimento do meloeiro ‘Gladial®’ fertirrigado

“…After drying, the material was weighed and crushed in a Willey mill for sulfur digestion according to the methodology described by Carmo et al (2000) to determine the contents of N, P, K, Ca, Mg, Fe, Mn, Zn, Regarding the distribution of dry matter in each organ of the plant, the fruits showed the greatest increase in quantity, followed by the leaves and stems with lower values. This is similar to the findings of Oliveira (2017), wherein the fruit stood out in the accumulation of dry matter compared to the vegetative part (leaf + stem).…”

“…However, the fruits only accumulated 264.33 g (0.58 lb) ha -1 at the 64 th DAE, which was 20% of the total Fe, in contrast to the findings of Melo et al (2013), where the fruits at 70 days after transplanting obtained a value of 8.48 mg plant -1 (141.33 g or 0.31 lb ha -1 ). Moreover, concerning the total Fe accumulated by the 'Gladial®' melon, it was observed that this occurred linearly and that this micronutrient had a slow accumulation until 14 DAE and intensified after 21 days, which was also noted by Oliveira (2017).…”

“…However, conventional fertilizers are based on outdated technical bulletins and manuals with general information about the melon crop and do not consider the specificity of each soil, thus hindering the proper recommendation for the demonstration of the productive potential of the crop (Oliveira, 2017). Furthermore, they lack information regarding the growth of the hybrid melon 'Gladial®' grown in the region, especially in the irrigated perimeters of the San Francisco Valley.…”