Articles
EFFECT OF POTASSIUM ON FLAVOR QUALITY AND LOX ACTIVITY OF CUCUMBER IN SOLAR-GREENHOUSE
Article number
761_64
Pages
463 – 470
Language
English
Abstract
The effects of potassium fertilizing were studied on volatile aromatic compounds, nonvolatile taste compounds and lipoxygenase (LOX) activity of cucumber in solar-greenhouse with Chinese cultivar Jinyou No.1, one of the major cultivars in the north of China, were investigated.
Potassium fertilizer varied from 0 (K0), 300 (K300), 600 (K600), 900 (K900) and 1200 (K1200) kg/hm2. The results showed that the content of 2E,6Z-Nonadienal increased from K300 to K600, K900, K1200 and that the 2,6-Nonadienol content increased from K0 to K300. The LOX activity enhanced gradually as potassium supply increased.
There was a positive correlation between LOX activity and the peak area of volatile aromatic compounds.
The organic acid and the tannin contents reduced significantly as K2O supply increased from 0 to 600 or 900 kg/hm2 respectively.
So we suggested that 600~900 kg/hm2 K2O was required for better flavor quality under this experimental fertility.
Potassium fertilizer varied from 0 (K0), 300 (K300), 600 (K600), 900 (K900) and 1200 (K1200) kg/hm2. The results showed that the content of 2E,6Z-Nonadienal increased from K300 to K600, K900, K1200 and that the 2,6-Nonadienol content increased from K0 to K300. The LOX activity enhanced gradually as potassium supply increased.
There was a positive correlation between LOX activity and the peak area of volatile aromatic compounds.
The organic acid and the tannin contents reduced significantly as K2O supply increased from 0 to 600 or 900 kg/hm2 respectively.
So we suggested that 600~900 kg/hm2 K2O was required for better flavor quality under this experimental fertility.
Authors
F.T. Wang, J.L. Liu, K.F. Xu, X.Z. Ai
Keywords
potassium fertilizer, cucumber, volatile aromatic compounds, nonvolatile taste compounds, lipoxygenase (LOX)
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