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研究结果表明,宁夏红寺堡扬黄新灌区沙壤灰钙土氮、磷、钾对甘草总黄酮含量影响大小为:施磷(负效应)大于施氮(正效应)大于施钾(负效应);因子互作效应对甘草总黄酮含量影响大小顺序为P×K>N×P>N×K;红寺堡扬黄新灌区沙壤灰钙土人工栽培甘草总黄酮含量≥5.0%以上的农艺措施为:施纯N 119.6~138.8kghm-2、施纯P2O5153.2~178.5 kghm-2、施纯K2O 90.9~105.6 kghm-2。
The results showed that the effects of N, P and K on total flavonoids content of licorice were as follows: the phosphorus application (negative effect) was greater than that of nitrogen application (positive effect) than the application of potassium (negative effect); The effect of factor interaction on total flavonoids content in licorice was P × K> N × P> N × K. The agronomic measures of ≥5.0% Applying pure N 119.6 ~ 138.8kghm-2, applying pure P2O5153.2 ~ 178.5 kghm-2 and applying pure K2O 90.9 ~ 105.6 kghm-2.