Abstract:

Experiments showed that net photosynthetic rate of leaves，the concentration of total sugar，freshness amino acid，sweetness amino acid，and acetate components(n-amy1 acetate，2-butoxyethyl acetate)of flesh were significantly increased in 24O mg·L^-1 potassium level， which resulted in improving photosyn thesis and quality of muskmelon．However，no significan t diference in yield was recorded among the treatments．Potassium imufllcient or excessive in this stuay resulted in increased non．stomatal linfirations to net photosyn thetic rate．Favorable nutrient value and flavor of muskmelon in medium culture were achieved when potassium level was adjusted to 240 mg·L^-1 in this study．

Key words: Muskmelon (Cucumis melo vat． reticulatus Naud．), Medium culture, Potassium levels, Photosyn thesis, Fruit quality