影响文冠果坐果率因素及提高坐果率的研究

文冠果是我国特有的木本油料作物,但其坐果率极低,素有"千花一果"的现象。本研究综合考虑了水分和内源激素两方面因素,分别观察灌水时间和次数对其坐果率的影响,以及喷施50 mg/kg的萘乙酸与灌水次数共同作用对文冠果坐果率产生的影响。试验结果表明,盛花期、花谢期和果生长期对文冠果进行灌水,会造成花果的大量脱落,尤以盛花期最为严重,坐果率仅有1.98%～2.56%,而盛花期不浇水,并结合盛花期喷施50 mg/kg的萘乙酸,坐果率达88.57%～92.68%,可有效阻止落花落果,提高坐果率。

Studies on Factors Affecting Fruit Setting of Xanthoceras sorbifolia and Improving Ways

Xanthoceras sorbifolia is a kind of woody oil-bearing plant endemic to China.However,its fruit-setting rate is very low,and there is a common saying like this: one thousand of flowers,but only one fruit.Two factors,water and NAA,were selected to study their effects on the fruit-setting rate.There are two experiments.One is only controlling the watering times during the full-bloom stage.The other is controlling the watering times together with 50ppm NAA application during the full-bloom stage.The results suggested that watering in the full-bloom stage led to a large number of flowers and fruits dropped,the fruit-setting rate only reached 1.98%-2.56%.Whereas if no watering but spraying 50ppm NAA in the full-bloom stage could improve the fruit-setting rate and prevent the flowers and fruits dropping significantly and effectively.The fruit-setting rate reached 88.57%-92.68%.