Effect of Light Conversion Film on Seedling Growth and Nutrient Accumulation of 'CB-1' Cultivar Tobacco
An experiment was carried out to explore the application effect of light conversion film on tobacco seedling cultivation of'CB-1'cultivar in Nanping tobacco area.Two different films,ordinary polyethylene film and light conversion film,were used to study the effects of light conversion film on light,temperature,tobacco seedling growth,and nutrient accumulation in the seedling cultivation greenhouse.The results showed that the light conversion film could adjust the light and temperature in the seedling shed.The photosynthetic effective radiant intensity and light transmittance in the seedling shed treated with light conversion film at 13:00 and 14:00 were lower than those of ordinary film,while the photosynthetic effective radiant intensity and light transmittance at 15:00 and 16:00 were higher than those of ordinary film.The temperature in the daytime(8:00-16:00)of the seedling shed treated with light conversion film was lower than that of the ordinary film treatment,and higher than that of the ordinary film treatment at other times.Light conversion film promoted the growth of tobacco plants.Compared with ordinary film treatment,the total root length,root surface area,root volume,number of branches,as well as root dry weight and total dry weight of the light conversion film treatment were significantly higher than those of ordinary film treatment.The light conversion film significantly affected the absorption and accumulation of nutrients.The nitrogen content in the aboveground,calcium content in the underground,phosphorus content and copper content in the whole plant of tobacco seedlings treated with light conversion film were significantly higher than those treated with ordinary film,while the calcium and magnesium content in the aboveground were lower than those treated with ordinary film.The treatment of light conversion film promoted the accumulation of nitrogen,phosphorus,and potassium in'CB-1'.In conclusion,the light conversion film promotes the growth and nutrient absorption of'CB-1'by regulating the light intensity and temperature inside the seedling shed,and increases the accumulation of dry matter and nutrients in tobacco seedlings.
light conversion film'CB-1'tobacco seedlingdry matter accumulationmineral elements accumulation
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