Abstract
The application of organic materials stimulated ethylene evolution in waterlogged soils. The application of dead and fresh grape leaves, dead citrus leaf, fresh citrus root, dead Japanese pear leaf, dead peach leaf, dead persimmon leaf, or rice straw greatly increased ethylene evolution. Evolution of ethylene from organic materials in the soil, which seems to require microbial activity, was markedly affected by soil temperature, soil moisture, and soil aeration. The amount of ethylene evolved from redried or fermented organic materials was markedly reduced to between one-25th and one-40th of that evolved from non-redried or non-fermented materials.
The application of dead grape leaf, which caused greatest ethylene evolution, markedly inhibited the growth of ′Muscat of Alexandria′ grapevine cuttings.
