多年生雑草ハマスゲの防除に関する基礎研究 : ハマスゲの生育と炭水化物含量の推移

概要

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1. Growth and reproduction of purple nutsedge (Cyperus rotundus L.) were studied for proper timings in the mechanical and chemical control measures. Changes of carohydrate contents both in the aerial and underground parts were also determined throughout the growing season to find the extent of sugar transport for the vegetative reproduction below the ground. 2. When parent tuber segment each having a bud were planted in Wagner pots, the weed grew vigorously and started new tuber formation two weeks after planting. In the fourth week the number of leaves reached maximal 19 and there was a drastic reduction in the T/R ratio. Floral formation was initiated 5 weeks after planting. 3. Among the carbohydrates determined fructose content was little changed both in aerial and underground parts throughout the growing season. However, a remarkable increase in sucrose and glucose contents was shown in the underground part from fourth through fifth week when active sugar transport must have been required for the formation and maturation of tuber. 4. From results of the experiment repeated mowing or tillage every two weeks after its emergence is suggested for control of this perennial weed. Chemical treatment between full leaf development is also applicable with those herbicides which have mobility to the underground part along with sugar transport.
日本雑草学会の論文
1978-08-25