Comparison of fruit development and harvesting mechanics indexes of major goji berry varieties in Qinghai production areas
[Objective]The goji berry(Lycium barbarum)varieties suitable for cultivation and mechanized harvesting in Qinghai were selected to provide scientific guidance for the advancement of mechanized pickers.[Method]Ningqi No.1,Ningqi No.5,Ningqi No.7 and Qingqi No.1 were used as experimental materials,the transverse and longitudinal diameter,100 fresh fruit mass and projection area of the fresh fruit at different developmental phases were investigated,and the fruit stalk binding force,fruiting pedicel binding force,transverse diameter compressive index and longitudinal diameter compressive index of the unripe and ripe fruit were measured.Then,the correlations between fruit morphologies and picking mechanical elements were analyzed,and the key morphological factors affecting picking mechanics were identified.[Result]The goji berry fruits of different varieties exhibited an"S"shape growth pattern in terms of their transverse and longitudinal diameter,100 fresh fruit mass and projected area.Rapid growth was observed during the periods of 4-8 days and 28-36 days after flowering,while slower growth occurred during the intervals of 8-28 days and 36-40 days after flowering.After ripening,the transverse diameter,100 fresh fruit mass and projected area of Ningqi No.7 fruit were significantly larger than those of other varieties.The stalk binding force of unripe fruits from various varieties was significantly higher than that of the ripe fruit,with no observed overlap between them within the 90% confidence interval.During unripe stage,the fruit stalk binding force of Ningqi No.5 was significantly lower than that of other varieties,while there was no significant differences among the remaining varieties.After ripe,there was no significant difference in fruiting pedicel binding force among these varieties.The fruiting pedicel binding force of unripe fruit overlapped 90% with that of ripe fruit,and the unripe fruit fruiting from different varieties exhibited significantly lower pedicel binding force compared to ripe fruit,except for Ningqi No.7.The fruit stalk binding force of Ningqi No.5,both in its unripe and ripe stages,exhibited significantly lower values compared to other varieties;however,no significant differences were observed among the remaining varieties.The transverse diameter compressive index of Ningqi No.7 was significantly higher than other varieties,while the longitudinal diameter compressive index did not show any significant difference from other varieties.The fruit stalk binding force of fruit was negatively correlated with its transverse diameter,longitudinal diameter,projected area and 100 fruit mass of the fruit.However,the transverse diameter compressive index exhibited a positive correlation with the transverse diameter and 100 fresh fruit mass.[Conclusion]The results demonstrated that the fruit morphology and picking characters of Ningqi No.7 were superior to other varieties,which were suitable for cultivation and mechanized harvesting in Qinghai province.
Lycium barbarumfruit developmentfruit stalk binding forcefruiting pedicel binding forcecompressive index
NETL
NSTL
万方数据
