【摘要】 对同一穗上的妃子笑早花大果和晚花小果的对比研究发现,各时期处于大体相同发育阶段的早花果果实争夺水分和溶质的能力均大于晚花果。14C-蔗糖标记实验更证实早花果比晚花果具有大得多的争夺碳水化合物能力。对矿质营养的吸收差异总体看来,早花果争夺矿质营养的能力明显强于晚花果,具体表现为:果皮中Zn、K、N、Mg和P的含量和果肉中N、K、Zn和Ca含量均是早花果明显大于晚花果。据此认为,早花果的果实大与其具有强大的竞争库力有关;果实中K、Zn和N的水平可能与荔枝大果性状呈明显的正相关。更多还原

【Abstract】 Differential fruit sizing of Feizixiao litchi fruit from early and late blooms in relation to nutrient competition were studied in comparison.The results showed that the ability of fruit from early bloom in competition for water and solutes was stronger than that of fruit from late bloom,and this was further confirmed by 14 C-sucrose experiment.In general,the ability of fruit from early bloom in competition for mineral elements was also stronger than that of fruit from late bloom.The contents of Zn,K,N,Mg and P in pericarp from early-bloom fruit were higher than that from late-bloom fruit,but Ca content was lower,and the contents of Zn,K,N and Ca in the aril from early-bloom fruit were higher than that from late-bloom fruit.It is suggested that the large-sized fruit from early bloom is related to its higher sink strength,and K,Zn,N levels in fruit might have positive effects on the formation of large-sized fruit in litchi.更多还原