脐橙果实膨大时间进程的研究

Study on the time course of the fruit expansion of navel orange

通过大量观测资料分析了“纽荷尔”、“罗脐-35”和“朋娜”脐橙品种果实膨大的时间规律及有关生长特性之间的内在联系。结果表明,脐橙果实膨大进程遵循Logistic方程的时间变化规律,由此而导出的果实膨大速率、果实大小及生长期之间的关系与实测资料一致。脐橙果实膨大持续时间长,膨大速率的变化较为平缓,幅度小。3个供试品种中“纽荷尔”品种具有明显的栽培优势,是优秀的换代和推广品种。

Through a large number of field measurements,time regulations of fruit expansion of the navel oranges Newherl,Roberson-35 and Pengla as well as internal relations among its growth characteristics are analysed. The results show that the expanding course of fruit obeys the regula-tion of Logistic equation. The relations among expanding rate,fruit diameter and expanding dura-tion are consistent with those obtained from field measurements. Duration of fruit expansion is long,but with a small range,the variation of expanding rate is gentle. Among the three observed species,Newherl shows strong advantages in cultivation practice. Therefore,it should be popularized.