Profundidade de semeadura no desenvolvimento inicial de pseudocereais

Abstract

<p class="Default">O objetivo deste trabalho foi avaliar a influência da profundidade de semeadura na emergência de plântulas de sementes de amaranto e quinoa. Foram avaliados os efeitos das profundidades de 0; 0,5; 1,0; 1,5 e 2,5 cm para amaranto e de 0; 1,5; 2,5; 3,5; e 4,5 cm para quinoa, obtidas por meio de anéis de pvc, com espessura equivalente a estes valores, que foram imersos no substrato para simular as profundidades de semeadura. O delineamento experimental foi inteiramente casualizado, com quatro repetições. Os dados foram submetidos à análise de variância e as médias, comparadas pelo teste de Tukey com 5% de probabilidade de erro. Foram realizados os testes de germinação, primeira contagem de germinação, emergência de plântulas em bandejas, massa de matéria seca e peso de mil sementes. A profundidade de semeadura para o melhor desenvolvimento inicial indicada para amaranto é de até 1,5 cm, e para quinoa até 2,5 cm.</p><p align="center"><strong><em>Seeding depth in the initial development of pseudocereals</em></strong></p><p class="Default"><strong>Abstract</strong><strong>: </strong>The objective of this study was to evaluate the influence of sowing depth on emergence of amaranth and quinoa seeds seedlings. The effects of the depths of 0; 0.5; 1.0; 1.5 and 2.5 cm and amaranth 0; 1.5; 2.5; 3.5; quinoa and 4.5 cm, obtained from PVC rings with a thickness equivalent to these values, which were immersed in the substrate to simulate the sowing depths. The experimental design was completely randomized, with four replications. The data were submitted to analysis of variance and the means were compared by Tukey test at 5% probability of error. The germination tests were carried out, first count, seedling emergence on trays, dry mass and weight of a thousand seeds. The seeding depth for the initial development best suited for Amaranthus is up to 1.5 cm, and quinoa to 2.5 cm. </p><p><strong> </strong></p>

Effect of soil type and sowing depth on the germination and early growth of two grain amaranth cultivars

“…It has been reported that shallow sowing conditions may inhibit amaranth germination (Gutterman et al, 1992;Rodrigues et al, 2016), and while in this study seedling emergence was not significantly affected by sowing depth, it could be presumed that shallow sowing did have a negative impact on amaranth's germination process which resulted in less vigorous seedlings. In this study, the root length of grain amaranth varied as a function of the interaction between soil types and sowing depths (Table 4).…”

“…Seeding depth is crucial for the success of grain amaranth. Under shallow sowing (≤5 mm) conditions, amaranth germination might be inhibited by excessive light, especially under low air temperature conditions (Gutterman et al., 1992; Rodrigues et al., 2016). However, because of the low reserves content in its seeds, sowing depth must not be deeper than 20 mm (Santos et al., 2019).…”