Medium Depths and Fixation Dates of ‘Seolhyang’ Strawberry Runner Plantlets in Nursery Field Influence the Seedling Quality and Early Growth after Transplanting

Abstract

The objective of this research was to investigate the influence of various depths of expanded rice hull (ERH) medium and fixation dates of runner plantlets of 'Seolhyang' strawberry on the growths in nursery field and in plastic house soil after transplanting. The five treatments in medium depths (30, 50, 70, 90, and 110 mm) and four treatments in fixation dates (1st and 15th July and 1st and 15th August) were tested. The growths of runner plantlets were investigated before transplanting to plastic house soil. The early growth and inflorescence rates of crops after transplant to plastic house soil were also investigated. The plant height and fresh weight of runner plantlets were the highest in the medium depths of 50, 70, and 90 mm. The medium depth of 30 mm had higher numbers of first roots, but lower root fresh weight compared to those of 70, 90, and 110 mm. The treatment of 30 mm in medium depth showed poorer growth in all indexes except root length and root weight compared to those of 70, 90, and 110 mm. The runner plantlets fixed on July 1 and July 15 showed good root growth and the weights of ERH adhered to form root balls were 18.3 g and 13.9 g, respectively. The detached amount of ERH was less than 40% in the two treatments when root balls were shaken by a vibratory sieve shaker. The plant growth at 45 days after transplanting to plastic house soil were not significantly different when the runner plantlets were fixed in the period from July 1 to Aug. 1. The inflorescence rates of the first cluster were 93 to 100% when runner plantlets were fixed in the period from July 1 to Aug. 1. By contrast the runner plantlets fixed on the Aug. 15 had a 67% in florescence rate for the first cluster. These results indicate that optimum depth of ERH medium was 7 cm and the ranges of optimum fixation dates are from July 20 to 25.

Impact of Runner Development of Mother Plants during Seedling Strawberries on Daughter Plants Growth and Development during Phase of First Cluster

“…이에 따라 육묘방식 또한 그동안 많이 행해졌던 노지육묘에서 비가림 시설을 이용한 규격묘 생산방식으 로 발전하고 있다 (Park et al, 2015a). 딸기농가는 양질 묘 생산을 위해 매년 세력이 우수한 모주를 선발하고 있 으며 3-4년 마다 순도가 높은 조직배양 모주로 교체하는 과정을 거친다 (Park and choi, 2015b). Faby(1997) and Cocco et al(2010) 런너발생 개수를 3-4개, 5-6개, 7-8개 및 9-10개로 조절 한 4처리를 두었다 (Fig.…”

Comparison of Propagation Methods and Cutting Collection Time Focusing on Transplant Growth, Fruit Quality, and Yield in Strawberry (Fragaria × ananassa Duch.)

“…'Pinning' is the traditional propagation method of strawberry transplants in Korea and is customarily conducted from March to September. This propagation method involves complex steps, such as planting mother plants, developing runners, anchoring the runners, separating the runners from the mother plants, and inducing flower bud differentiation (Na et al, 2014;Park and Choi, 2015).…”

Growth, Productivity, and Quality of Strawberry as Affected by Propagation Method and Cultivation System

“…This traditional method (pinning propagation) requires transplantation of the mother plants, anchoring of runner plants, and separation of runner plants from the mother plants. These processes require more than six months (Na et al, 2014;Park and Choi 2015). However, cutting propagation method is known to require only three to four months to complete those steps described above (Kim et al, 2018).…”