水肥耦合对当归产量和品质的影响效应研究

探索水肥耦合对当归品质和产量的影响效应，为当归GAP规范化种植中的水肥调控提供理论依据。采用水肥双因素试验，通过二元二次多项式拟合灌水量、施肥量与当归产量和主要品质指标（阿魏酸含量）的关系，建立影响效应模型，并对其进行检验分析和相关性分析。结果表明：在灌水一定的情况下，随着施肥量的增加，当归的产量先增加后减少；在施肥一定情况下，随着灌水量的增加，当归的产量也是先增加后减少，当归的最高产量出现在中水中肥区，即灌水量1073.97 m3/hm2，施肥量808.97 kg/hm2，最大产量为15804.36 kg/hm2；在灌水量一定的条件下，随着施肥的增加当归的阿魏酸含量先增加后降低，在施肥量一定的条件下，随着灌水量的增加当归的阿魏酸含量也是先增加后降低，当归的阿魏酸含量最高出现在中高水中高肥区，即灌水量1491.42 m3/hm2，施肥量863.55 kg/hm2，阿魏酸最高含量为2.41 mg/g。合理有效的灌溉施肥使当归达到优质高产。

Influence Effect Study of Water and Fertilizer Coupling on Yield and Quality of Angelica

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.