Germination and seedlings growth of Corn (Zea mays L.) to allelopathic effects of rice (Oryza sativa L.)

Allelopathy is the direct or indirect effect of plants through chemical compounds produced by the plants itself. . An experiment was conducted to study the allelopathic effect of plant organs extract (leaf, stem, root and total), and different rice extract densities (0%, 25%, 50% and 100%) on the germination and seedling growth of corn with four replications was used. Treatments included Different plant organ extract showed significant impact on germination rate, germination percentage, coleoptile weight, radicle weight, radicle length and coleoptile length of corn. Rice extract densities effect on germination percentage, coleoptiles weight, radicle weight, radicle length and coleoptiles length was significant. The interaction between rice extract and plant organs had significant effect on radicle weight and coleoptiles length. Control treatment (0% rice extract density) had obtained the highest germination rate, germination percentage, coleoptiles weight, radical weight, radical length and coleoptiles length. All experimental characteristics decreased with increase rice extract densities. The higher values for germination rate, germination percentage, coleoptile weight, radicle weight, radicle length and coleoptiles length was related to stem extract, followed by root, leaf and total extract. According to the results of this trial, it can be concluded that one of the reasons of the decrease of cultivated plants operation after rice, is the presence of allelopathic materials in herbaceous remains of this plant.