Recipientes e substratos na qualidade e nos custos de produção de mudas de raphanus sativus var. acanthiformis

Abstract

The horseradish is a tuberous rapeseed, annual cycle poorly studied in Brazil. Overall, vegetables, because they have tiny seeds and seedlings very fragile, has been treated differently by producers, which in general have invested in the development of seedlings which has generated positive results production techniques in crop yields. Based on this, the objective of this study was to evaluate aspects of growth, quality and economical caused by containers and substrates in the production of radish seedlings. For this, three experiments were developed, organized into blocks with three replications, being developed in a factorial 4 x 4. In the first were evaluated horseradish seedlings grown in four containers (162, 200, 288 and 450 cells) combined with four substrate types (S1 = 100% earthworm humus, S2 = 75% of worm humus + 25% fiber of shredded coconut; S3 = 50% earthworm humus + 50% fiber shredded coconut; S4 = 25% earthworm humus + 75% crushed coconut fiber). Second and third were also radish seedlings assessed, in both evaluations carried out on four different dates (14, 17, 20 and 26 days after sowing), however, the second those dates were combined with the four substrate formulations (S1 = 100% earthworm humus, S2 = 75% earthworm humus + 25% of shredded coconut fiber; S3 = 50% earthworm humus + 50% fiber shredded coconut; S4 = 25% humus worm + 75% fiber shredded coconut), already the third with four containers (162, 200, 288 and 450 cells), with the latter used as fill substrate that the cells that provided the best result in the second experiment. In the first study evaluated the emergency percentage and the emergency speed index. The parameters evaluated in the second and third experiments were: a) number of leaves per plant; b) lump of stability; c) shoot lengths; d) Root; e) Total; f) collect diameter, g, h, i, j, k and l) fresh and dry masses of shoot, root and total; n) Dickson Quality Score; and, o) of seedling production costs. In the first experiment there was no difference to the average percentage of seedling emergence, since the emergency speed index higher values were observed for containers of 450 cells (11 cm3.célula-1). In general, the substrate S1 is provided to the best aspects of growth of the seedlings. With respect to containers, all who had cell volume greater than 15 cm3, were considered suitable for the development of seedlings, since seedlings provided with high and similar IQD. As for cost, the container 450 cells was considered the least expensive. However, the joint analysis of data allows you to indicate the 288 cells, when earthworm humus is available as filling substrate, as the most suitable for the production of radish seedlings 'round Shogoin'.