关键词: ‘玫瑰香’葡萄, 根施硅肥, 离子迁移谱技术, 果实挥发性物质

Abstract:

In order to control the fresh-keeping period of postharvest of fruit，the different dosages of silicon fertilizer were used to the root zone of the 9-year-old which a dragon trunk-like shape ‘Muscat Hamburg’ grapevine at the cluster period， and the volatile organic compounds and conventional quality indicators of the fruit were determined by gas chromatography-ion mobility spectroscopy （GC-IMS） and other methods at the ripening stage of fruits. The results showed that the values of conventional quality indicators （such as soluble solids， total acid， Vc and total sugars） of ‘Muscat Hamburg’ grapes of fruits using different dosages （250， 500， 800 g·plant^-1） made a difference，and contents were as follows： 16.47%，17.97%，16.87%；0.325%，0.225%，0.300%；12.703，18.870，19.487 mg·100g^-1；23.82%，22.59%，30.18%. When the dosage was 800 g·plant^-1， the soluble solids and total acid had no change compared with CK（P>0.05）， but the Vc and total sugars were increased greatly（P<0.05）. The analysis of the Voc’s for fruit by using different dosages showed that the peak volume of some lipids was positively correlated with the increase dosage of silicon fertilizer， reached a peak at dosage of 800 g·plant^-1. The peak volumes of ethyl acetate and ethyl propionate were increased respectively compared with CK 70.89%， 368.49%. This paper’s aim was that laid a theoretical basis for further exploring the influence of these substances on postharvest fresh-keeping.

Key words: ‘Muscat Hamburg’ grape（Vitis vinifera L.）, silicon fertilizer used to root zone, gas chromatography-ion mobility spectroscopy（GC-IMS）, volatile organic compounds of fruit