CAJ | 학술논문

将黄顶菊植株根茎和叶片通过浸提方式提取获得其水浸液，用以培养玉米、小麦、大豆、白菜种子和幼苗，测定种子发芽和幼苗生物量，另外还将4种作物种子播种于采集的黄顶菊根部土壤中观察种子萌发和幼苗生长情况。测定结果表明：黄顶菊植株水浸液和其根部土壤对4种作物生长具有不同程度的抑制作用，种子的发芽率和发芽速度降低；种子萌发后的幼苗生长受到明显抑制，幼苗高度降低而根系长度和鲜质量增长。同时经处理的作物植株出现叶片数减少，叶色发黄，茎秆弱小等异常症状，说明黄顶菊对测试的几种作物生长有明显的阻碍性化感作用。
장황정국식주근경화협편통과침제방식제취획득기수침액，용이배양옥미、소맥、대두、백채충자화유묘，측정충자발아화유묘생물량，령외환장4충작물충자파충우채집적황정국근부토양중관찰충자맹발화유묘생장정황。측정결과표명：황정국식주수침액화기근부토양대4충작물생장구유불동정도적억제작용，충자적발아솔화발아속도강저；충자맹발후적유묘생장수도명현억제，유묘고도강저이근계장도화선질량증장。동시경처리적작물식주출현협편수감소，협색발황，경간약소등이상증상，설명황정국대측시적궤충작물생장유명현적조애성화감작용。
The allelopathic effects of yellow-top (Flaveria bidentis )on seed germination and seedling growth of four crops,including corn,wheat,soybean and cabbage,have been examined in the present study.The results indicate that the water extracts of F. bidentis from different parts of yellow-top plants shown inhibitive effects on growth of the four crops to different extent;the final seed germination rates are reduced by;the speed of the seed germination is obviously slowed down. 3 )The rhizospheric soils of yellow-top weed plants have strong inhibitive effect on growth of the crops;seed germination rates and growth rates of the crop seedlings are very significantly decreased (p<0.0 1 ).The morphology of crop seedlings is also markedly altered:color of seedling leaves became yellowish and the stems are much smal-ler compared with seedlings grown with normal soils.