FIGURE 1 Effects of Elymus nutans extracts on germination of highland crops. Values are mean ± SD(n=5). Different letters denote significant differences between treatments with a > b > c > d, the same below.
Root length of hulless barley, oat, wheat and rape showed significant differences under three kinds of extracts, while there was no significant effect on quinoa (Figure 2a). The whole extracts exhibited stronger inhibitory effects than pieces and root zone soil extracts on root growth of hulless barley and wheat. No significant difference of root growth was detected among the three extracts treatments for oat and rape.
The shoot growth of hulless barley, oat and wheat were impeded by the three kinds of extracts, whereas quinoa and rape shoot were not sensitive to the extract (Figure 2b). There was no significant difference in the shoot growth of hulless barley among whole, pieces and root zone soil extracts. Oat shoot proved to be sensitive to the whole extracts of donor plants. The plant whole, pieces and root zone soil extracts exhibited 14.55%, 11.32% and 7.71%, allelopathic inhibitory on shoot growth of wheat.
Similar to the effects of extracts on shoot length and root length, seedling dry weight of hulless barley, oat, wheat and rape to three kinds of extracts showed differences with crops and extracts (Figure 2c). No significant difference was detected in dry weight of quinoa among different extract treatments. The whole and root zone soil extracts exhibited higher inhibition than pieces extract on seedling dry weight of hulless barley and wheat.