血色卫矛水浸提液对作物的化感作用OA

To investigate whether the seeds of Euonymus sanguineus contain allelopathic substances and to assess their effects on the germination and seedling growth of crops,highland barley and mung bean were selected as recipient plants in this study.Water extracts of varying concentrations(0.02,0.04,0.06,0.08,0.10 g·mL-1)of water extracts from the seeds,leaves,and stems of Euonymus sanguineus.Seed germination potential,germination rate,seedling height,root length,and other indicators were measured using the petri dish filter paper method,and the allelopathic response index(RI)was calculated.The results showed that the water extracts of Euonymus sanguineus exhibited a significant inhibitory effect on both the seed germination and seedling growth of barley,and this inhibitory effect increased with rising concentration;while the effect on mung bean germination rate was relatively minor,though seedling growth(particularly root length)was still significantly inhibited.Under high-concentration treatment(≥0.06 g·mL-1),the germination rate and germination potential of barley seeds decreased to 56.67％and 34.47％,respectively.The inhibitory effect of the water extract of Euonymus alatus on seedling root length was particularly pronounced;under treatment with a 0.10 g·mL-1 leaf extract,the root lengths of barley and mung beans were only 6.2％and 11.9％of the control,respectively,with inhibition rates reaching 93.8％and 88.1％.In addition,barley was significantly more sensitive to allelopathic substances than mung beans,and root growth was more sensitive to the inhibitory effect than the aboveground parts.This study confirms that the seeds of Euonymus alatus contain potent allelopathic substances that can significantly inhibit the germination and root development of recipient plants.It provides a scientific explanation from the perspective of allelopathy for the causes of obstacles to the natural regeneration of its populations,and offers a theoretical basis for the rational allocation of this species in agroforestry systems as well as the development and utilization of plant-derived allelopathic substances.