‘夏黑’葡萄花穗的不同整穗长度对果实生长及品质的影响

以‘夏黑’葡萄为试验材料，开花前1周分别留花穗穗尖的3 cm、4 cm、5 cm、7 cm，疏除花穗其余部分，并以不整穗作为对照。盛花期时统一采用50 mg/L GA3处理花穗，盛花期后15天再分3组用50 mg/L GA3、50 mg/L GA3＋2.5 mg/L CPPU、50 mg/L GA3＋5 mg/L CPPU处理花穗，研究‘夏黑’葡萄花穗的不同整穗长度对果实生长及品质的影响，以期为生产实践提供依据。结果表明，3 cm、4 cm、5 cm这3种整穗长度均能显著增大果实纵径、横径，提高果实单果重和可溶性固形物的含量，并能显著降低果实可滴定酸的含量。在‘夏黑’葡萄生产上配合花穗整穗技术使用生长调节剂进行果实膨大处理时，宜采用3 cm的整穗长度，盛花期施用50 mg/L GA3，盛花期后15天施用50 mg/L GA3＋2.5 mg/L CPPU进行生产。

Effects of Different Lengths of Floral Cluster by Pruning on Fruit Growth and Qualities of‘Summer black’Grape

The material of this study is‘Summer black’grape, only remained the tip of the grape floral clusters 3 cm, 4 cm, 5 cm and 7 cm, and cut off the other parts 7 days before the florescence, and used the clusters without cutting as the control. The grape floral clusters treated by 50 mg/L GA3 on full-bloom stage and they were divided into 3 teams and respectively used 50 mg/L GA3, 50 mg/L GA3＋2.5 mg/L CPPU,50 mg/L GA3＋5 mg/L CPPU 15 days after full-bloom stage. The aim was to study the effects of different lengths of floral cluster by pruning on fruit growth and qualities of summer black grape, and provide a scientific basis in grape production. Results showed that the treatments of 3 cm, 4 cm and 5 cm all significantly increased the length and diameter of berry, the every berry weight and the total soluble solids content and they all significantly decreased the titratable acid content. It was recommended that the floral clusters which was pruned to 3 cm were treated by 50 mg/L GA3 on full-bloom stage and 50 mg/L GA3＋2.5 mg/L CPPU 15 days after full-bloom stage in production.