Effects of Microclimatic Conditions in Different Construction of Liaoshen Type Seedling Greenhouse on Seedling Quality

The comparative research was carried out to study the effects of different positions of the three seedling greenhouses on the tomato plug seedling indexes,and their performances of raising seedlings were analyzed.The three seedling greenhouse were Liaoshen type I seedling greenhouse with span of 7.5 m,10 m and the semi-underground seedling greenhouse with span of 7.5 m,and the five equal positions were marked as T1,T2,T3,T4,T5 from the south to the north.The results showed that the long-span seedling greenhouses were beneficial to reduce seedling differences among the greenhouses with the same configuration,and the semi-underground seedling greenhouse was suitable for raising uniform seedlings among the greenhouses with the same span.In all,the long-span and semi-underground seedling greenhouses should be taken in designing the construction of seedling greenhouse.