烤烟漂浮育苗营养液增温配套措施研究

Heating Nutrient Solution in Float System of Tobacco Seedling

摘要: 为了抵御倒春寒对烟苗生长造成的不利影响，研究了漂浮育苗营养液增温的7种不同方式及其对烟苗生长的影响。结果表明，7种不同增温措施均可在温度较低的夜间将营养液温度控制在25~28 ℃，提高室内温度及基质温度3~4℃；烟苗出苗及漂浮育苗期分别缩短7、20 d以上；出苗率和烟苗素质明显提高。

Abstract: In order to solve the chilly problem during late spring, seven measures were used to heat nutrient solution in float system of tobacco seedling. The results showed that, by using any of these seven measures, the solution temperature could be controlled within 25 and 28℃, the temperature of greenhouse and medium temperature could be increased by 3-4 ℃ during night. Emergence time was shortened for more than 7 days, and the seedbed period was shortened for more than 20 days, germination rate and seedling quality were improved significantly.