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.