Allelopathic Effects of Aqueous Extracts of Different Segments of Wheat Straw on the Seed Germination and Seedling Growth of Goosegrass (Eleusineindica)
The objective is to study allelopathic effects of aqueous extracts from root, stem and spikes of wheat straw on the seed germination and seedling growth of goosegrass (Eleusine indica). A petri dish bioassay method was used to test the allelopathic effects. Germination rate of root, stem and spikes aqueous extracts was 71.3%, 68.7%and 58.7%respectively, while the control was 84.5%, and germination index was 12.82, 6.77, 6.07 respectively, while the control was 18.39. Compared with control, the root length increased by 17.1%, 17.8% and 6.6% respectively when the concentration of root, stem and spikes aqueous extracts was 6.25 mg/mL, but decreased by 25.6%, 31.6%and 95.6%respectively when the concentration was 100 mg/mL. EC50 was calculated through dose-response equation between different concentrations of root, stem and spikes aqueous extracts and root lengths, and the value was 219.182, 157.545, 41.007 mg/mL respectively. Aqueous extracts from root, stem and spikes of wheat straw all inhibited the germination of goosegrass, the germination rate and index decreased with the increasing concentration. Stem and spikes aqueous extracts inhibited the shoot length of goosegrass significantly only at the highest concentration, while root aqueous extracts had little effects. The root, stem and spikes aqueous extracts promoted the root growth of goosegrass at low concentrations but inhibited it at high concentrations.
NETL
NSTL
万方数据
维普
