Abstract:In order to figure out appropriate calcium source, stage, and apparatus of exogenetic calcium supply for Red Globe (Vitis vinifera L.) grape, a field experiment was conducted to investigate the effects of calcium spray on berry calcium content, pectin content, and fruit quality by spraying calcium nitrate or alditol calcium on leaves or clusters during the young berries stage or two weeks before the harvest. The results indicate that all calcium spray treatments enhance the calcium contents of petioles and all organs of berries significantly, and the calcium contents under the calcium spray during the young berries stage are much higher than those under the calcium spray during 2 weeks before the harvest for both calcium sources and both apparatus spray treatments. Alditol calcium is suitable for cluster spray, while calcium nitrate is suitable for foliar spray. The foliar spray of alditol calcium on both stages induces the highest calcium contents in petiole. The calcium contents in peels increase significantly among all organs of berries, at values of 6.6 to 20.3 times of the control. For both calcium sources and both spray stages, the calcium contents in peels under the cluster spray are higher than those under the foliar spray, while the latter is more favoring to seed calcium contents. The calcium contents in flesh under the alditol calcium spray during the young berries stage are the highest among all treatments, at a value of 3.98 mg/g, DW, which is about 2.84 times of the control. High significant positive correlations are found between the flesh calcium content and flesh total pectin content, flesh proto pectin content and berry firmness, which implies that the calcium spray enhances the calcium content of flesh and thus improves the fruit storage quality.