【摘要】 研究了红汁乳菇子实体乙醇抽提物对水稻、稗草的化感影响。用不同浓度的红汁乳菇子实体乙醇抽提物处理水稻和稗草种子 ,测量处理后不同时间的水稻和稗草幼苗的根长和苗高 ,按照 Willamson,G.B.的方法计算化感作用效应 (RI)。结果表明 :红汁乳菇乙醇抽提物对稗草幼苗的生长有显著的抑制作用 ,能够导致稗草叶片发黄 ,缩短稗草的根和苗 ,甚至延迟部分种子的萌发。其中 8.5 mg/ ml的乙醇抽提物处理稗草种子后 3d、8d,对根长的化感作用效应分别为 - 0 .98、- 0 .5 8;对苗高的化感作用效应分别为 - 0 .5 0、- 0 .5 1。 6 .5 m g/ ml和 10 .5 mg/ ml处理组的结果与 8.5 mg/ ml处理组的结果在 p=0 .0 5水平上差异不显著。对水稻幼苗的生长表现出一定的调节作用 ,在较低浓度下 (≤ 4 .5 0 mg/ m l)对水稻幼苗有一定促进作用 ,如 4 .5 0 m g/ ml处理水稻种子后 3d、8d,对苗高的化感作用效应分别为 0 .2 5、0 .10 ;在较高浓度下 (如≥ 6 .5 0 mg/ ml)对水稻根长和苗高均为抑制作用 ,6 .5 0 mg/ ml时抑制作用最强 ,处理水稻种子后 3d、8d对幼苗的根长的化感作用效应分别为 - 0 .93、- 0 .4 8;对苗高的化感作用效应分别为 - 0 .5 0、- 0 .2 2 ,在 p=0 .0 5水平上与其它处理组差异显著更多还原

【Abstract】 Laboratory studies were conduced to determine the allelopathic potential of Lactarius hatsudake on the seedling growth of Oryza sativa and Echinoloa crusgalli. Their seeds were treated with different concentration ethanol-soluble extracts of Lactarius hatsudake. The root length and the shoot height of the plant were measured. RI (RI=1-C/T, when T≥C; RI=T/C-1, when T<C. C was the value of control and T was the value of treatment) was calculated according Willamson, G. B. (1988). The result showed that the seedling growth of Echinoloa crusgalli was inhibited by the ethanol-soluble extracts of Lactarius hatsudake significantly. It caused yellow leaves, smaller the root length and shoot height, and some decayed seeds. Three days and eight days after the treatment with 8.5mg/ml ethanol-soluble extracts of Lactarius hatsudake, the RIs of Echinoloa crusgalli root were -0.98、-0.58, respectively and of Echinoloa crusgalli shoot were -0.50、-0.51, respectively. The RIs of treatments with 6.5 mg/ml and 10.5 mg/ml were not significant different with the RI that treated with 8.5 mg/ml at the p=0.05 level according to Duncan’s new multiple range test. But the influence of the ethanol-soluble extracts of Lactarius hatsudake had inhibitory effect on Oryza sativa with high concentration (such as ≥6.50 mg/ml) and had stimulation effect with low concentration (≤4.50 mg/ml). Three days and eight days after the treatment with 4.5mg/ml ethanol extract of Lactarius hatsudake, the RIs of Oryza sativa shoot were 0.25,0.10,respectively. Three days and eight days after the treatment with 6.5mg/ml ethanol-soluble extracts of Lactarius hatsudake, the RIs on the root length of Oryza sativa were (-0.93,) -0.48 and on the shoot height were -0.50, -0.22, respectively. It was significant different with the RIs of other treatments at p=0.05 level according to Duncan’s new multiple range test.更多还原