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KMID : 0380119810040000093
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Korean Journal of Ecology
1981 Volume.4 No. 0 p.93 ~ p.108
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Studies on the Allelopathy of some Poaceae Plants
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Abstract
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This investigation includes the sick soil phenomenon caused by the self-poisoning of Setaria italica, Sorghum nervosum, Zea mays and Miscanthus sinensis among Poaceae.
It elucidates whether the poison is directly excreted from the root or the secondary product resulting from the decomposition in the soil; the effect of Miscanthus sinensis on the germination and growth of other plants, and the effect of Zea mays grown between furrows to shade Angelica gigas on its growth. The results obtained are as follows;
Supplied with the leakage water from the pots, in which the same plants as the test ones were grown, in antioipation of the poison to be directly excreted from their roots, Sataria italica and Zea mays exhibited the growth inhibition more than 30%, whereas Sorghum nervosum and Miscanthus sisnensis were not effected in growth at all.
When cultivated in the soils mixed with the roots of the some plants as the test ones, in anticipation of the poison to be the secondary product resulting from the decomposition in soil, Setaria italica and Zea mays showed growth inhibition of more than 50%, which is greater than that of the case of the leakage water, and Miscanthus sinensis exhibited no inhibition either, whereas Sorghum nervosum in the 50% plot showed heavy growth inhibition of more than 80% to the case of the leakage water.
The common or uncommon plants found easily in the group of Miscanthus sinensis were not affected by the extracts of the stems and leaves of Miscanthus sinensis in germination and growth.
Supplied with the leakage water from the pots in which Miscanthus sinensis was grown, among Lespedeza cryiobotrya, Oenothera odorata, Raphanus sativus var. acanthiformis, Zoysia japonica, Patrinia scabiosaefolia, which are easily found in the group of Miiscanthus sinensis, only Patrinia scabiosaefolia was slightly inhibited in growth in the 100% plot, whereas the others did not show any inhibition at all.
Mean while, Amaranthus patulus, Solanum nigrum, Capselia bursa-pastoris var. triangularis, Alopecurus amurensis, Chenopodium album var. Cedntrorubrum, which could not be found in the group of Miscanthus sinensis, were all distinctly inhibited.
In the experiment on the effect of Zea mays on the growth of Angelica gigas, its growth was severely inhibited by one-half to two thirds with the increased concentration in both the cases of growing in the mixture of the soil and the powdered root of Zea mays and being supplied with the leakage water from the pot in which Zea mays was grown.
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