Abstract: Adding the right amount of organic acids or amino acids to the nourishment liquid, it promoted the flue-cured tobacco growth and nitrogen storing up. It showed: Increasing the root activity and the chloro- phyll amount, promoting accumulation of the dry matter and nitrogen. The effects of different kinds of organic acids or amino acids were not same. The chlorophyll amount of the organic acids treatments increased quickly on the preceding stage and reduced fast in the later part, while the chlorophyll amount of the amino acids treat- ments changed gradually, compared with the organic acid treatments. What-s more, the organic acids promoted the flue-cured tobacco growth and nitrogen storing up much more than the amino acid did, though the activity of nitrate reductase and nitrogen amount were lower. In a word, the effects of the organic acids on the flue-cured tobacco growth and nitrogen storing up were better than that of the amino acid.

Key words: Organic acids, Amino acids, Flue-cured tobacco, Growth, Nitrogen absorption

CLC Number: 

• S572