Respostas produtivas do alho a diferentes densidades de plantas e peso de bulbilhos-semente

• Autor(a) principal: Reghin, Marie Yamamoto
• Data de Publicação: 2004
• Outros Autores: Otto, Rosana Fernandes, Zagonel, Jeferson, Dalla Pria, Maristella, Vinne, Jhony Van Der
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542004000100011; http://repositorio.ufla.br/jspui/handle/1/5831
• topic: Alho – Produtividade; Alho – Semente – Bulbo; Garlic – Productivity; Garlic – Seeds – Clove; Allium sativum

The experiment was carried out in Ponta Grossa (PR), located in a altitude of 880 m. The experimental design was a randomized blocks with four replications. Treatments arranged in a factorial scheme 2 x 4, resulted from the combination of two seed clove weight (W1 = 3,0 – 3,5 g and W2 = 2,0 – 2,9 g) and four plants densities m-2 (33,3, 50,0, 66,6 and 100). To obtain these densities, it was arranged plants in simple and double rows. On the simple row plants arrangement had four rows in longitudinal direction of the bed having 1,20 m width spaced 0,30 between rows and 0,10 and 0,05 m between plants, obtaining 33,3 and 66,6 plants m-2, respectively. On double one it was used three double rows spaced among them with 0,30 m and within row, 0,10 and 0,05 m, respectively to obtain densities of 50 and 100 plants m-2. Seed bulbs of cultivar Roxo Pérola de Caçador were vernalized at 4°C/40 days before planting. After vernalization treatment the bulbs were thrashed and the bulbils separated by weight. The planting was at 14/05/2002, using plants arrangement in simple and double rows. Seed clove weight did not promote difference on yield response, except to characteristic of bulb secondary growth, being superior the occurrence on W2 compared to W1. In relation to plant densities, both on W1 and W2, it was observed linear response and it decreased in according of the increase on plant density. Besides, plant densities were effective on yield even in relation to total bulbs per area and also considering bulb size. Both W1 and W2, increasing plant densities, from 33,3 to 100 plantas/m2, it was observed linear response, from 1,28 to 2,94 kg m-2 to W1 and 1,21 to 2,90 kg m-2 to W2, respectively. The increasing of plants densities promoted higher yield however it was also observed decreasing on bulb size. When bulbs were classified into differents classes it was observed difference only when W1 was used. In order to obtain bulbs of higher value commercial in W1, as class 6 (> 47 < 55 mm) higher than 45% , this result was observed from density of 40 plants m-2.