[Effects of cultivating measures on rhizome yield and some main active constituents of Curcuma longa L].

OBJECTIVE: To substantiate the effects of cultivating measures on the rhizome yield and main active constituents of Curcuma longa. METHOD: Randomized block design was applied to the study of the sowing time and plant density, and orthogonal experiment L9 (3(4)) was conducted to determine the quantity of fertilizer. RESULT: The effects of cultivating measures on the rhizome yield and some main active constituents of Curcuma longa were noticeable. The rhizome yield went up, and the contents of curcuminoids and essential oils went down with the increase of fertilizer application. CONCLUSION: The main cultivating measures for high-yield and good-quality of rhizome: rational sowing time-late March, plant population-12 checkrows per m2, 1 mother rhizome per checkrow. The suitable fertilizer requirements have also been formulated.