留6～7片叶摘心，坐果率、产量和总酸较高，但果粒重、果实含糖量和出汁率较低，果穗松散，而且增加了夏季修剪的用工量。

Fruit set rates, yield and total acid content were high, but berry weight, sugar content and juice rate were low for 6-7 leaves pinching, cluster apperars relax, and more workload in summer pruning.

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架式、结果部位、新梢留量对果实中还原糖和总酸的影响均达到极显著水平；

Trellis systems, berry height and shoots density all had very significant effects on the content of reducing sugar and total acid;

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