Effect of Calcium treat on the Development and Fruit Setting of Hazwlnut Tree
CHEN Long-Tao, YANG Bo-Wen, WANG Ying-Nan, FAN Ming-Shou
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We studied the effect on the hazelnut growth and fruit setting ratio by dealing with calcium reagent in an early stage to provide a theoretical evidence for the hazelnut growth. CaCl2 and EGTA were sprayed to two marked hazelnut samples until the two solutions drip while flowering. T1:CaCl2 was 20 mmol·L-1, T2:EGTA was 20 mmol·L-1. CK:clear water was as a contrast. Diameters and calcium content were measured at the 30th and 35th days after flowering. All the marked clusters were collected to calculate the number of fruits and abortion rate when they were mature. The diameters of the two young hazelnut samples were, respectively, increased by 12.63% and 14.13% by spraying 20mmol·L-1 CaCl2 at the 30th day after flowering compared with CK, while calcium contents(Wt) were, respectively, increased by 27.2% and 44.63%. The diameters of samples were, respectively, decreased by 11.58% and 13.04% by spraying EGTA, while calcium content(Wt) both reaching significant differences with a decrease of 9.74% and 13.76%, respectively. Compared with CK, the diameters of two samples were, respectively, increased by 10.94% and 15.18% by spraying 20 mmol·L-1 CaCl2 at the 35th day after flowering, while calcium(Wt), respectively, were increased by 25.13% and 40.61%. The diameters of the two samples were, respectively, decreased by 15.63% and 13.39% by spraying 20 mmol·L-1 EGTA, while calcium(Wt) both reaching significant differences with a decrease of 26.8% and 20.06%, respectively. Calcium content showed a significant positive correlation with the average number of fruit per mature cluster, while showing a significant negative correlation with the average percentage of abortive fruit per mature cluster.