Abstract:

Salvia splendens,a red bedding plant is used widely in landscape in the Summer and Autumn.High temperature exceeding 30℃ will seriously affect its ornamental value. The change of development stage and growth indexes of 9 Salvia Splendens after high temperature treatment was investigated. The seedling experiments were done in farmland under natural high temperature.The results showed that there are significantly different in growing period of Salvia Splendens under natural high temperature.‘Huo Wa’ and ‘Pround Red’ had the longer florescence.Plant high, rown diameter, inflorescence length and inflorescence number of nine varieties were significantly affected by high temperature stress and showed significant differentce in varieties.The tests also found that all the varieties of growth slowed down and there were a small number of leaves wilting.However,high temperature did not affect the flowering of Salvia Splendens.On the whole , ‘Pround Red’, ‘Queen’,’Huo Wa’ and ‘Hong Hai’ were tiptop in visual value and heat-tolerance.