Allelopathic effects of Juglans regia leaf litter extract on seed germination and seedling growth of Lolium multiflorum and Melilotus albus
[Objective]The study of the allelopathic effect of Juglans regia leaf litter extract on seed germination and seedling growth of Lolium multiflorum and Melilotus albus grass provides a theoretical basis for forest and grass planting in northern Shaanxi,and is conducive to the sustainable development of J. regia economic forest.[Method]This study L. multiflorum and M. albusas were used as research receptors,and different concentrations of J. regia fallen leaf extracts were set up to analyze the effects of J. regia fallen leaf extracts on seed germination and seedling growth of legume grass.[Result](1) High concentration of J. regia leaf litter extract had a significant inhibitory ef-fect on the germination rate and germination potential of L. multiflorum,and with the increase of extract concentra-tion,the germination rate of L. multiflorum significantly decreased. As the concentration of the extract increased,the germination potential and germination rate of M. albus showed a trend of first increasing and then decreasing,and the germination time decreases.(2) The extraction solution of J. regia withered leaves reduced the chlorophyll content of M. albus and osmanthus seedlings.While at moderate concentrations,under the influence of the extraction solution of J. regia withered leaves,the root activity of L. multiflorum significantly increased.(3) The antioxidant enzyme activ-ity of L. multiflorum seedlings was significantly reduced under high concentration. The catalase activity in the seed-lings of M. albusincreased first increased and then decreased with the increase of extract concentration.[Conclusion]J. regia leaf litter had a significant effect on seed germination and seedling growth of soybean grass,and the effects of allelochemicals produced by J. regia leaf litter on the selected grass species should be fully considered when planting grass in the underforest.
allelopathypastureseed germinationseedling growthantioxidant index
万方数据
维普
