Effects Of Different Mycorrhizal Fungi On Growth Of Flue-cured Tobacco

The AM fungi can increase the growth and the nutrient uptake of flue-cured tobacco seedling, so we verified its effection on seedling culture and field production through choosing the Glomuse aggregatum fungi (BGC HUN02D) and Glomuse mosseae fungi(BGC HUN01 A) as the tested fungi, and selected K326 tobacco as host plant. Aim to establish the industrial AM fungi growth technology. The main results were summarized as follows.1 The effection to growth and nutrient uptake of AM fungi by different culture medium and nutrient solutionThe culture medium of mixture of sand and soil which the rate of sand to soil was 3:1 could promote spore growth of AM fungi, and the culture medium of zeolite could promote mycelium growth of AM fungi. The infect rate of mixture of sand and soil treat was higher than other culture medium treat.The bring up process of AM fungi could been influencd by component, contents and irrigate frequency of nutrient solution especially the phosphorus value of nutrient solution, so we must control the phosphorus value of nutrient solution be about 10 mg/kg to guarantee the high efficiency produce of AM fungi.2 The effection to growth and nutrient uptake of flue-cured tobacco seedling by AM fungiUnder the low nutritional conditions, the infect rate of Glomuse mosseae treat and Glomuse aggregatum treat better than non-inoculated treat, and the infect rate of Glomuse aggregatum treat better than Glomuse mosseae treat.The Glomuse mosseae treat could promote flue-cured tobacco's rooting ability and seedling yield, and also could increase uptake ability of N,P and K value, especially could strengthened the activity of soil Phosphatase.3 The effection to growth and nutrient uptake of flue-cured tobacco by AM fungiThe plant height and the number of blade inoculated by Glomuse mosseae fungi was better than non-inoculated treat, and the number of blade and the weight of leaf inoculated by Glomuse mosseae fungi was better than Glomuse aggregatum treat. The Glomuse mosseae treat could increase N, K, total sugar, reducing sugar and nicotinamide value, and could coordinate the rate of N to nicotinamide and the rate of sugar to nicotinamide, also the Glomuse mosseae treat could control suitable protein value, and then its could improve the quality of flue-cured tobacco.The rate of N to nicotinamide on all treat in top leaf was belong to normal range about 0.8-0.9. The rate of N to nicotinamide on Glomuse aggregatum treat and non-inoculated treat in middle and under-part leaf was belong to high range about beyond 1.0, but The rate of N to nicotinamide on Glomuse mosseae treat was belong to normal range.The rate of K to chlorine on Glomuse mosseae treat in all parts of leaf better than non-inoculated treat, meanwhile Glomuse mosseae treat could turn down the protein value.