Seed treatment and cultural practices influence seedling growth of hydroponic lettuce
HortTechnology, cilt.8, sa.4, ss.560-564, 1998 (Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 8 Sayı: 4
- Basım Tarihi: 1998
- Doi Numarası: 10.21273/horttech.8.4.560
- Dergi Adı: HortTechnology
- Derginin Tarandığı İndeksler: Scopus
- Sayfa Sayıları: ss.560-564
- Anahtar Kelimeler: Fluid drilling, Lactuca sativa, Nutrient film technique, Pelleted seed, Pregerminated seed
- Sağlık Bilimleri Üniversitesi Adresli: Evet
Özet
Raw, pelleted or germinated seeds of 'Cortina' lettuce (Lactuca sativa L.) were sown in phenolic foam cubes preplant soaked in water or full-strength nutrient solution (2 mmho·cm-1, 2 dS·m-1). The seeds were left uncovered or covered with fine vermiculite (grade 5), and seedling emergence characteristics were subsequently determined. Shoot fresh masses and their coefficients of variation (cv) by 9 days after planting (1 or 2 true leaves) and by 31 days after planting (4 or 5 true leaves) also were determined. Soaking the cubes in nutrient solution rather than water increased seedling emergence percentage and rate, and increased shoot fresh masses by 9 or 31 days after planting. This increased shoot fresh mass was accompanied by lower cv of shoot fresh mass by 9 days after planting, but not by 31 days after planting. Covering seeds with vermiculite decreased emergence from 99% to 93%, but increased shoot fresh mass by 9 and 31 days after planting when cubes were soaked in water, but not in nutrient solution. Seed treatments influenced shoot fresh mass at 9 and 31 days after planting in the order germinated > pelleted > Raw. Germinated seeds resulted in lower cv of shoot fresh mass (24%) than raw or pelleted seeds (29%) by 31 days after planting. Thus, sowing germinated seeds into foam cubes soaked in full-strength nutrient solution, with or without covering the seeds with vermiculite, produced the heaviest and most uniform seedlings.