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KMID : 1041219860280010001
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Journal of Sericultural and Entomological Science
1986 Volume.28 No. 1 p.1 ~ p.14
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Responses of VA mycorrhizal Fungus, Glomus mosseae, on the Growth and Nutrition of Mulberry tree
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Abstract
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This study was carried out to acguire some basic information on nutritional and physiological effects of vesicular arbuscular mycorrhizac (VAM) on mulberry trees inoculated with Glomus mosseae, Gerd. & Trap. grown in clay for 65 days and treated with 5 different levels of phosphorus, ie 30, 60, 120, 240, 480 ppm as (NH4)2 HPO4.
At the end of the expermental period the levels of fixed phosphate in the soil was measared.
And the native VAM fungi were collected to select the most effective VAM species on mulberry tree. The nutritional and biochemical effects of VA mycorrhizae on the mulberry leaves were also studied.
Those results are as follow.
1. The mulberry trees grown in clay and inoculated with VAM were heavier in shoot dry weight as much as 197% than uninoculated plants. But in vermioulite, uninoculated mulberry trees were heavier as much as 135% than inoculated.
2. The rates of endo mycorrhizal formation in clay was highest at 60ppm level of phosphorus, and vesicles in roots were formed in 240ppm and 480ppm level of phosphorus, but not in 30ppm, 60ppm and 120ppm.
3. The greatest growth responses of VAM inoculation was found at 60ppm level of phosphorus, and the optimum phosphorus level for VAM responese appeared to be 60ppm.
4. VAM was able to absorb soil-fixed phosphate.
VAM abosrbed Fe-bound phosphate most efficiently and Ca-bound phosphate with ease but not Al·bound phosphate and Al-Fe occluded phosphate.
5. Three species of Gigaspora and one species of Glamus growing naturally in mulberry plantations were collected and tested for the growth responses.
Gigaspora tricalipta and Gigaspora calospora revealed the greatest growth responses on mulberry tree among tested VAM fungi.
6. Mulberry leaves inoculated with VA mycorrhizal fungi contained 9.8% more phosphate and 15.2% more nitrogen, 22.2% more water-soluble carbohydrates and 15.2% more proteins than uninoculated plants.
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