エニシダ由来の他感物質の土壌中への異動と蓄積

概要

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Broom (Cytisus scoparius LINK) prevents vegetational succession in Etajima and Takehara in Hiroshima prefecture, where it was planted to re-establish natural forests. The allelopathic effects of broom were studied by bioassays using lettuce seeds. The results are as follows : 1 . Stems and leaves of broom contained relatively strong allelochemicals (Table 1), which leached out by rain drops(Table 2) . 2 . Allelochemicals from broom accumulated in 'Masa' soil (immature yellow soil derived from granite) containing a small amount of organic matter and inhibited seed emergence (Table 3) . However in the soil containing a large amount of organic matter, the inhibition of root growth of lettuce was not appreciable(Fig. 3) . 3 . Sparteine, which is a bioactive substance contained in broom, was not the major allelochemical substance (Fig. 4) . Hydrophilic substances with positive charges from broom exhibited a strong allelopathic activity(Table 4,5). 4 . Allelochemicals which leached out from the stems and leaves of broom plants by rain accumulated in soils and inhibited the root growth of the seedlings of other plants.
日本雑草学会の論文
1989-05-30