【摘要】 研究了园林植物红叶李Prunus ceraifera不同器官及根际土壤水浸液对白三叶Trifolium repens,紫花苜蓿Medicago sativa,剪股颖Agrostis tenuis和黑麦草Lolium perenne等种子萌发和幼苗生长的影响,其中种子萌发实验采用培养皿滤纸法,幼苗生长实验采用温室盆栽法。结果表明:在50 g·L-1浸提液质量浓度下,红叶李根、茎、叶水浸液对白三叶种子萌发具有极显著的抑制作用,强弱顺序为叶>根>茎;红叶李落叶和根际土壤水浸液对白三叶种子萌发也具有较强抑制作用;在测试质量浓度范围内,红叶李叶片水浸液对白三叶和紫花苜蓿种子萌发表现为抑制作用,对剪股颖和黑麦草则表现出"低促高抑"效应;红叶李叶片水浸液对白三叶和紫花苜蓿幼苗的生长主要表现为促进作用,对剪股颖和黑麦草则主要表现为抑制作用;4种植物对红叶李化感作用的平均敏感性强弱顺序为剪股颖>黑麦草>白三叶>紫花苜蓿,其中紫花苜蓿的平均敏感指数为正值,其余均为负值。结果为从化感角度提高红叶李的园林配置水平提供了依据。更多还原

【Abstract】 To understand the chemical relationships of Prunus cerasifera with others turfgrass plants, the allelopathic effects of an aqueous extract from different organs and rhizosphere soil of P. cerasifera on seed germination and seedling growth of four turfgrass plants: Trifolium repens, Medicago sativa, Agrostis tenuis, and Lolium perenne, were studied. Seed germination was tested indoors using a biological monitoring method, and seedling growth was tested in a pot experiment. Results indicated that the root, stem, and leaf aqueous extracts of P.cerasifera at 0.05 g·mL-1concentration significantly inhibited(P<0.01) seed germination of T. repens with leaf > root > stem. Leaf litter and rhizosphere soil extracts of P. cerasifera also had a strong inhibition on seed germination of T. Repens. Leaf extracts inhibited seed germination of T. repens and M. Sativa with A.tenuis and L. perenne being promoted at lower concentration and being inhibited at higher concentration. For seedling growth, leaf extracts promoted T. repens and M. sativa, and inhibited A. tenuis and L. perenne. Overall the allelopathic sensitivity was in the order of A. tenuis > L. perenne > T. repens > M. sativa. Additionally,the overall allelopathic sensitivity of M. sativa was positive, but the others were negative. These results provide a basis for allelopathic application of P. cerasifera.更多还原