Abstract
The present study has been aimed to study whether the richer growth of plants under the Prosopis juliflora Pro. Israel tree is due to the elimination of allelopathic potential or due to other factors.
The common plants occurring under th Prosopis juliflora Pro. Israel and Acacia tortilis stands when analysed showed that the understorey plants of P. juliflora Pro. Israel produce more phytomass per plant although the mineral uptake in plants under A. tortilis is better than the former. The physic-chemical properties of soil revealed non significant differences in the soil characteristics, yet the understorey platns of P. juliflora Pro. Israel showed better growth of plants compared to A. tortilis, indicating no apparent interference in P. juliflora Pro. Israel stand.
The chemical inhibition of P. juliflora Pro. Israel was proved when the leachates were bioassayed using the seeds of pearl millet and sesame. The leaf leachate of P. juliflora Pro. Israel exhibited maximum inhibitory effect on both the test crops as compared to stem, litter and soil.
Although the P. juliflora Pro. Israel is found to possess inhibitory principle(s) for pearl millet and sesame, it is non-allelopathic in nature as it is not able to inhibit the understorey plants. The P. juliflora tree can be called as inhibitory but to be considered as allelopathic.
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