The Physiological Effects Of Water Stress On Container-Grown Longan Leaves And Analysis Of Flower Develoopment

Treated container-grown longans by water stress from November. 2004 to December 2004. The effects of water stress on container-grown Longan' s certain physiological items, flowering. The result shows:1. The effect on miner' s nutrition The K, Ca , Mg content of leaves was higher than untreated tress, while content of N, were low compared with untreated.2. The effect on organic nutrition The solubility sugar, content of leaves was higher than untreated tress, while content of amylum and solubility albumen were low compared with untreated.3. The effect on C/N The C/N of treated leaves was increased by water stress.4. The chlorophyll a and chlorophyll b was decreased and the rate of chlorophyll a/b was increased by water stress.5. The effect on photosynthesis The transpiration rate, GS, photosynthesis rate of leaves was lower than untreatedtress, and the concentrat i on of C02 were not effect by water stress.6. The effect on endogenous hormone The content of GA3, IAA was decreased and the content of ABA , IAA was increased by water stress.7. The effect on the balance of endogenous hormone The rate of ABA/GA3, ZT/GA3 was increased and the rate of IAA /ABA was decreased by water stress.8. The effect on flowing The flowing rate of untreated was 48. 15%, whi le the flowing rate of treated was 85. 71%. The flowing rate of container-grown longan was improved by water stress.