Abstract:

The aim was to explore the effect of water and fertilizer coupling on yield and quality of angelica, and provide theoretical basis for water and fertilizer control of GAP standardized cultivation of angelica. The study was two-factor test for water and fertilizer. The relationships among irrigation, fertilizer rate and yield and the content of ferulic acid were analyzed through binary quadratic polynomial, and then the effect model was established for the test analysis and correlation analysis. In the condition with certain irrigation water, along with the increases of fertilizer, the content of yield increased first and then reduced; in the condition with certain fertilizer rate, along with the increases of irrigation water, yield increased first and also reducedafter. The highest content of yield appeared in the area with medium water and fertilizer, irrigation water was 1073.97 m3/hm2, fertilizer was 808.97 kg/hm2, highest content of yield was 15804.36 kg/hm2. In the condition with certain irrigation water, along with the increases of fertilizer, the content of ferulic acid increased first and then reduced; in the condition with certain fertilizer rate, along with the increases of irrigation water, ferulic acid increased first and also reduced after. The highest content of ferulic acid appeared in the area with middle-high water and fertilizer, irrigation water was 1491.42 m3/hm2, fertilizer was 863.55 kg/hm2, the highest content of ferulic acid was 2.41 mg/g. Therefore, reasonable and effective irrigation and fertilization made angelica reach high quality and yield.