Abstract
Currently, some important hybrids have replaced traditional radish cultivars, without, however, developing necessary studies on the best planting density for different Brazilian conditions. Thus, the present study aimed to evaluate the effect of spacing between rows and plants on the development and yield of the ‘Margaret Queen’ radish hybrid. A randomized blocks experimental design with four replications in a 3 x 3 factorial scheme was used. Three row spacings (10, 15, and 20 cm) and three spacings between plants in the row (3, 6, and 9 cm) were evaluated. The seeds were sown in furrows at 1.0 cm deep, and the harvest was carried out at 28 days after sowing. The following were determined: number of leaves, root diameter, root length, average root weight, non-damaged root yield, damaged root yield, commercial root yield, and non-commercial root yield. The row spacing did not influence the development of the plants, but it affected the root yield. The row spacing of 20 cm had the lowest root yield. The spacings that provided the highest commercial root yield (D>30 mm) of the Margaret Queen radish hybrid were 10 and 15 cm between rows and 6 cm between plants. The 3 cm spacing between plants is the least suitable for the cultivation of the Margaret Queen radish hybrid radish under the studied conditions.
Highlights
The radish (Raphanus sativus L.), belonging to the Brassicaceae family, having its origin in the Mediterranean regions, is an annual crop of small size and fast development, presenting itself as an essential alternative for vegetable producers (Steiner et al, 2009)
It was observed that the spacing between plants influenced the number of leaves per plant
The spacing between plants of 3 cm provided the lowest number of leaves per plant (5.33), and the spacings of 6 and 9 cm resulted in 5.67 and 5.72 leaves per plant (Table 2)
Summary
The radish (Raphanus sativus L.), belonging to the Brassicaceae family, having its origin in the Mediterranean regions, is an annual crop of small size and fast development, presenting itself as an essential alternative for vegetable producers (Steiner et al, 2009). At higher planting density, the pressures exerted by the plant population affect their development (Resende and Costa, 2003) This factor promotes competition between individuals of the same and different species for growth resources, such as water, light, and nutrients; it can affect production, resulting in the formation of smaller productive units, that is, thinner roots (Janick, 1986; Lopes et al, 2008; Corrêa et al, 2014). On the other hand, Minami et al (1998), studying the effect of different spacing between rows (15, 20, and 25 cm) and between plants (5 and 10 cm) on the radish crop, they reported that the different spacing between rows did not affect the variables evaluated (number of leaves, root and leaf production (g) per plot, average root and leaf production per plant, and the relationship between root and leaf production). The present study aimed to evaluate the effect of spacing between rows and plants on the development and yield of the Margaret Queen radish hybrid
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