[Effect of water and nitrogen fertilizer coupling on yield and growth of genuine medicinal materials Chuzhou Chrysanthemum morifolium].

Objective: To discuss the suitable water and nitrogen management mode in artificial cultivation of Chuzhou Chrysanthemum morifolium.
Methods: According to two factors quadratic regression rotation design experience, pot experiment was conducted.
Results: There were remarkable effects of water and nitrogen coupling on inflorescence number, yield and overground part biomass of Chuzhou Chrysanthemum morifolium, and there were significant positive interaction between water and nitrogen. Effects of water on early-term inflorescence yield and overground part biomass of Chuzhou Chrysanthemum morifolium were higher than that of nitrogen fertilizer, but the effect on total inflorescence yield was opposite.
Conclusion: Considering for the fresh inflorescence yield, the suitable water and nitrogen management mode is to keep 93% of the water holding capacity and nitrogen fertilizer (N) 0.34 g/kg of Chuzhou Chrysanthemum morifolium in pot experiment, and as for the dry inflorescence yield, the suitable water and nitrogen management mode is to keep 75% of the water holding capacity and nitrogen fertilizer (N) 0.2 g/kg.