李子叶水浸液对5种作物的化感效应

Allelopathy Effects of Water Extracts of Prunus salicina Cotyledon on Five Crops

研究了李子叶水浸液对农林复合系统中5种作物种子萌发及幼苗生长的影响,结果表明,李子叶水浸液对几种受体作物种子的萌发率、幼苗苗高和根长均有不同程度的抑制作用;随着水浸液浓度的增加,对5种受体作物的株高、幼苗地上部分鲜重的抑制效应增加;随着水浸液浓度的降低,其对所有受体的根长和幼苗地上部分鲜重的抑制作用逐渐减弱、消失,甚至表现为促进作用。对所有受体作物的萌发也表现出同样的浓度双重效应。

Allelopathy effects of water extracts of plum cotyledon （Prunus salicina） on seed germination and seedling growth of 5 receptor crops were studied. The results showed that the aqueous extracts inhibited germination, seedling length and root length. As the concentration of the extracts increased, the inhibitory effect on the plant height and fresh weight of seedlings above ground increased. In the contrary, the suppression on seedling length and fresh weight of crop roots of all the receptors, gradually decreased, disappeared and even changed into stimulating effects when the concent ration of the extracts declined. Furthermore, the receptors for all crop germination also showed the same double effects of concentration.