Abstract:

To screen suitable combination of water and fertilizer for fruit enlarging of ‘Crimson’ seedless grape, an integrated drip irrigation experiment of water and fertilizer with 4 irrigation amount gradients and 4 fertilizing amount gradients was set during the whole growth period to explore the effects on traits of fruit enlarging. The results showed that the interaction of main treatments and side treatments had significant effects on the indexes of the fruit enlarging traits of ‘Crimson’ seedless grape. The combinations of 5850 m ³/hm², 5400 m³/hm² irrigation amount and 3150 kg/hm², 2700 kg/hm² fertilizing amount were beneficial to the transverse elongation, longitudinal elongation, per berry weight increase, and hardness enhancement. The combination of 5850 m³/hm² irrigation amount and 2700 kg/hm² fertilizing amount had the best treatment effect. The combinations of 5400 m³/hm², 4950 m³/hm² irrigation amount and 3150 kg/hm², 2700 kg/hm² fertilizing amount were beneficial to the soluble solid content increase. The combination of 4950 m³/hm² irrigation amount and 3150 kg/hm² fertilizing amount had the best treatment effect.

Key words: drip irrigation of water and fertilizer, ‘Crimson’ seedless grape, fruit enlarging