Influence of daughter plant weight and position on strawberry transplant production and field performance in annual plasticulture.

摘要

Strawberry ('Chandler') plants were grown in a greenhouse hydroponic culture system from 28 April to 20 July 1999 to produce runners (stolons) with several daughter plants. By mid-July, each 'Chandler' plant had developed about 30 daughter plants on 12 runners with 1 to 6 daughter plants on each runner. Daughter plants varied in weight from <0.9 to >10 g. Daughter plant weight and position on the runner affected new root development on plug plants during the first 7 days under mist irrigation. At 3 weeks, 87% of daughter plants that weighed <0.9 g and at least 96% of daughter plants that weighed >1.0 g were rated acceptable for field transplanting, respectively. The percentage of daughter plants from second to tenth node position that were rated acceptable for field planting ranged from 98 to 88%, respectively. Runner production in autumn was not affected by either position on the runner or weight at the time of daughter plant harvest. However, larger daughter plants produced more branch crowns than did smaller daughter plants in autumn. Transplant survival in the field was 100%. In the spring, 'Chandler' plants produced a 10% greater yield from daughter plants that weighed 9.9 g compared to those that weighed only 0.9 g.