关键词: 阳光玫瑰葡萄, 整穗, 省工, 品质

Abstract: In order to investigate the optimum pattern for spikelet pruning, this paper took spikelet tip length 6 cm of ‘Shine Muscat’ grape as the control (CK), and studied the effects of different pruning patterns at different flowering stages on grape fruit growth, quality and work efficiency, including 14 d before anthesis with spikelet tip length at 3 cm (A), 4 cm (B) and 5 cm (C); 7 d before anthesis with spikelet tip length at 4 cm (D), 6 cm (E) and 8 cm (F); spikelet tip length at 4 cm (G), 6 cm (H) and 8 cm (I) during flowering. The test results indicated that there were certain differences in fruit growth and quality by spike pruning methods at different periods with different spikelet tip lengths. Among spike pruning treatments 7 d before anthesis and during flowering, berry-setting percentage increased with the spikelet tip length increasing. And the berry-setting percentage gradually decreased, while berry shape index increased. The titratable acid content and soluble solid content also increased gradually with the delay of pruning time. The value of “L” and “C” were the best in 7 d before anthesis, whereas the value of “CIRG” was the lowest. The seedless rate and hollow rate of different treatments showed 14 d before anthesis >7 d before anthesis > flowering. By comparing work efficiency, treatment with late spiket pruning would use the less time on pruning. Thus, labor saving and high efficiency could be achieved in production. Using the comprehensive evaluation of principal compohent analysis, the ranking of each treatment was as following: D>C>H>B>G>A>F>I>E>CK. It meant that 7 d before anthesis with spikelet tip length at 4 cm was the optimum method for ‘Shine Muscat’ grape, according to the evaluation based on the result of principal components analysis. This study was of guiding significance for ‘Shine Muscat’ grape production in China.

Key words: Shine Muscat grape, spikelet pruning, labor saving , quality