培地に混和したシロザおよび数種植物葉のアレロパシー

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Experiments were carried out using cucumber (Cucumis sativus L. cultivar. Suyo) as a test plant which was grown in a pot or a seedling case containing a medium consisting of a mixture of quartz sand and leaf powder of several weeds or crops. Stem length and dry weight of the test plants were measured to analyse the allelopathic effects of leaves incorporated into the medium. Results obtained are summarized as follows. 1 . Stem length and dry weight of the organs of cucumber plants increased when leaf powder of Pueraria lobata OHWI was added into the medium. The values were almost the same as in the control when Fagopyrum esculentum MOENCH or Oryza sativa L. was added. The values decreased when leaf powder of Chenopodium album L., Datura stramonium L., Artemisia princeps PAMP. or Digitaria adscendens HENS. was added (Figs. 1-2). 2 . Stem length and dry weight of the organs of cucumber plants decreased in proportion to the amount of leaf powder of Chenopodium album or Datura stramonium added to the medium (Figs. 3-4). 3 . Growth of cucumber plants was depressed when leaf powder of Chenopodium album, its ethyl alcoholic extract or its residue was added. In particular, the dry weight of the plants was reduced when leaf powder or the residue was added (Fig. 5). 4 . Depression of growth of cucumber plants in the medium containing Chenopodium album was assumed to be caused by the increase of the osmotic pressure and pH of the solution in pots and by the growth-inhibiting substances from the leaves.
日本雑草学会の論文
1989-12-25

培地に混和したシロザおよび数種植物葉のアレロパシー

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