【摘要】 利用生草果园土壤浸提液砂培龙眼、毛豆、罗卜,观测其发芽率。结果表明:培养23d时,百喜草处理的发芽势>平托花生处理的>圆叶决明处理的>宽叶雀稗处理的>对照的,而百喜草处理最终发芽率(84.7%)>平托花生处理的(80.0%)>圆叶决明处理的(55.3%)>CK的(40.0%)>宽叶雀稗处理的(33.3%),各处理间差异极显著。利用土壤浸提液的稀释液砂培毛豆、龙眼、罗卜时,不同处理间发芽率差异不显著。而原液砂培时,平托花生处理可显著地提高毛豆的发芽率,宽叶雀稗处理显著地降低毛豆的发芽率,且其两种浓度间差异达显著水平;原液培养罗卜时,宽叶雀稗处理发芽率(92.0%)最低,与其它处理间差异显著,其浓度间也有显著性差异;4种牧草处理都抑制罗卜单株干重的增长,百喜草、宽叶雀稗处理浓度间差异极显著,圆叶决明处理浓度间差异显著。更多还原

【Abstract】 Soil extracts from gardens planted with cover crops were used for sand culture of seeds of 3 species of crops (longan,Glycine max and Radish) to observe their germination percentage.Germination vigor of the seeds of these 3 crops cultured at day 23 was different among the cover crop treatments and is in the order of Paspalum notatum Flugge>Arachis pintoi>Chamaecrista rotundifolia>P.Wettsteinii > CK,and the final germination rate varied in the order of treatments P.notatum Flugge (84.7%)>A.pintoi (80.0%)>C.rotundifolia (55.3%)>CK(40.0%)> P.Wettsteinii (33.3%).There were obvious differences in seed germination percentage between treatments.Diluted soil extracts were used for sand culture of these 3 species of crops,and no significant difference was found in germination percentage between the treatments.With original soil extracts the Arachis pintoi treatment significantly increased the germination of sand cultured Glycine max;the P.Wettsteinii treatment significantly decreased the germination of Glycine max,and no significant difference was observed in seed germination rate between two concentrations of soil extracts;in the P.Wettsteinii treatment Radish had the lowest germination rate (92.0%) under sand culture,and was significantly different from other treatments;there was also difference in germination rate between concentrations of the soil extract.Four pasture treatments all inhibited the increment of dry weight of radish;there was significant difference in dry weight increment of radish between concentrations of Chamaecrista rotundifolia treatment,and highly significant difference between the concentrations of the treatments of P.notatum Flugge and P.Wettsteinii.更多还原