根际温度影响植物生长.docVIP

1 Author Kim YoungSuk; Endo, M.; Kiriiwa, Y.; Chen Ling; Nukaya, A. Title Effects of root zone heating during daytime at different growth stages on the flowering, growth and yield of strawberry Akihime grown in substrate culture. Source Horticultural Research (Japan). 2009. 8: 3, 315-320. 10 ref. 日文期刊 Abstract The effect of daytime root zone heating at different stages on the flowering, growth and yield of strawberry cv. Akihime was studied by growing the plants under substrate culture in a heated plastic house. Two experiments were conducted. Experiment 1 was performed from 28 September 2007 to 30 April 2008 and experiment 2 was conducted from 6 December 2007 to 30 April 2008. Both experiments consisted of one control (non-heated) and 3 treatments. In treatment 1 (T1), the substrate was heated for the whole growing period (from the flower bud initiation stage to the end of the experiment). In treatment 2 (T2), heating was initiated at the flowering stage (from flowering time to the end of the experiment). In treatment 3 (T3), heating was initiated during the flower bud development stages (from flower bud initiation stage of flowering stage). Results showed that root zone heating treatments during daytime at the terminal flower cluster hardly affected the flowering date of the terminal flower of each cluster and fruit yield. There was no significant difference in the development of flower buds by any heating treatments. However, root zone heating treatments during the daytime at the flowering stage of the second lateral flower cluster tended to enhance the date of flowering at the terminal flower of the second lateral flower cluster in T1 and T3, and that of the third lateral flower cluster at all heating treatments. Fruit yield in February and March and during the whole period increased in T1 and T3. The development stages of flower buds at 5 weeks after initiation of the heating was advanced and the size of flower buds after heating treatments was signifi