| Summary: | The experiment was conducted to study an allelopathic effects of leucaena leaves on growth of rice, wrinkle duck-beak
and mung bean. The result showed that different concentrations of the leucaena extracts showed various growth patterns on the
selected plant species. The growth of seedling shoot length, root length, dry weight and fresh weight were decreased by
increasing concentration of the leucaena leaves extract. In rice and wrinkle duck-beak was found that the inhibition was higher in
the root than the shoot growth. In addition, the use of leucaena extracts 1:1 to 1:5 can restrain the growth of wrinkle duck-beak
root length 100% at the age of 3 days, but from the age of 7 days, all leucaena extracts completely restrained the wrinkle duckbeak root length. Furthermore, allelopathy of leucaena results can be utilized for the biological weed control and to reduce the
use of herbicide in agriculture systems.
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