Seedling Substrate Alternative Research And Promotion Of Flue-cured Tobacco Floating Stone

The flue-cured tobacco floating seedling substrate use peat, but the exploitation of the peat has "kidney of the earth," said the wetland cause irreversible damage, protection of peat resources in crunch time. Since 2008, Wenshan tobacco and Qiubei matrix factory cooperation, using weathered ranite instead of peat test, the repeated test after several formulations, confirmed the wind fossils are the ideal substitute material. From 2009 to 2011 in different replacement ratio of different particle size of experiment, probe into the best allocation ratio and particle size range, study on weathering granite instead of peat as comparative advantages and disadvantages of seedling substrate and traditional peat seedling, and strengthen the operation technology. Experiments confirmed that the wind fossils, partial substitution of peat is completely feasible, 1-5mm in diameter ratio on particle size than other particle size, On the quality of tobacco seedling, the wind fossils substitution rate and 90% 85% wind fossil substitution rate and traditional matrix, And the cost is lower than that of the traditional matrix 1.1 yuan/mu. Because the 85% wind fossil substitution rate is light, convenient transportation and operation, solid choose 85% wind fossil substitution ratio, 1-5mm ratio of the particle size as the state of Wenshan flue cured tobacco seedling promotion object. After 2011 to 2013 years into the counties tobacco companies demonstration sites, the wind fossils substitution matrix in tobacco seedlings growth and quality of tobacco seedling can reach the standard, and save cost on the original basis of peat.