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连续 3个生长季跟踪观测了 35株成年红富士苹果树的果实生长发育状况 ,以早期预测采收时果实大小为目标进行相关分析。结果表明 ,无论是在早期 (盛花后 30～ 5 0d)还是中期 (盛花后 6 0～ 12 0d) ,红富士苹果幼果的日平均生长量 (横径、干重、鲜重或体积的日增长量 ) ,与采收时果实大小呈极显著正相关关系 ,相关程度远高于该段时期内果实相对生长量或某一时刻观测的幼果大小与采收时果实大小的相关程度。采用早期和中期不同预测指标的相关方程 ,预测 1994～ 1996年各年采收时果实大小的结果与田间实测结果进行比较 ,以盛花后 30～ 5 0d果实横径的日平均生长量作为预测指标 ,根据预测指标与采收时对应果实横径之间的线性回归方程 y =15 3.5 71x +73.492获得的预测结果优于其它早中期预测指标 ,且无论是单株树果实平均大小的预测值还是不同树势的树的果实大小预测值 ,与采收时的实测值之间不存在显著差异。因此 ,盛花后 30～ 5 0d幼果的日平均生长量可作为采收时果实大小的合理预测指标。
The fruit growth and development of 35 adult Red Fuji apple trees were observed and tracked in three consecutive growing seasons. Correlation analysis was conducted with the objective of early prediction of fruit size at harvest. The results showed that the average daily growth rate of young Fuji apple (diameter, dry weight, fresh weight or volume of day), no matter in the early stage (30 ~ 50 days after full bloom or in middle stage The amount of growth, and the size of the fruit at harvest showed a significant positive correlation, the correlation degree is much higher than the relative growth of fruit within this period or observed at a time the size of the fruit and the size of the fruit harvest correlation. Using the correlation equations of different early and mid-term prediction indexes, the results of fruit size at harvest of each year from 1994 to 1996 were predicted and compared with field measurements. The average daily growth of fruit diameter at 30 ~ 500 days after flowering was used as a predictor , The prediction results obtained according to the linear regression equation y = 15 3.5 71x +73.492 between the prediction index and the corresponding fruit diameter at harvest are superior to other early and mid-term prediction indexes, and no matter whether the average size of the individual fruit tree is predicted There was no significant difference between the predicted fruit size of trees with different shrubs and the measured values at harvest. Therefore, the average daily growth of young fruits from 30 to 50 days after flowering can be used as a reasonable predictor of fruit size at harvest.