Effect of Walnut Extract on Germination Characteristics of Several Species of Weeds

Abstract

Abstract Some plants can prevent seed germination and growth in other plants by producing toxic allelochemicals materials. this study aimed was to effect of walnut extract on germination characteristics of several species of weeds. The experiment was conducted in factorial based on a completely random design with three replications. The treatments of the experiment were two walnut cultivars, four species of weeds) Soutani, Rajal, Khardel and Zivan) and four levels of walnut extract (0, 10, 20 and 30 percent). Results showed that there was a significant difference among walnut extract concentration, weed species, and interaction between them for all studied traits (P< 0.01). In present study with increase the concentration of walnut extract from zero to 30%, in all four types of weeds the germination rate, germination percentage, root, stem and seedling length, and seed vigor index were significantly reduced. Also in the treatment of 30%, walnut extract species of Khardel showed the highest, and Shoufan, Rajal, and Zivan showed the lowest germination rat, germination percentage, root, stem, and seedling length, and seed vigor index.