中文摘要：

以“青芋1号”菊芋为试材,通过田间试验对菊芋全生育期各器官内氮、磷、钾养分的吸收积累与分配特征进行了研究。结果表明,随生育期的延长菊芋各器官营养元素浓度呈下降趋势。营养元素吸收速率呈双峰曲线变化;营养元素积累总量表现为氮〉钾〉磷。块茎形成前,营养元素主要存于茎、叶;块茎形成到块茎膨大始期,叶内营养元素分配量持续减少,块茎分配量持续增多,而茎内磷、钾则呈单峰曲线变化;块茎开始膨大后,营养元素在茎、叶的分配量均迅速减小,块茎分配量迅速增加。

英文摘要：

In order to understand the absorption and distribution patterns of major nutrient elements in jerusalem artichoke （ Helianthus tuberosus L. ）, a field experiment was carried out to study on nitrogen, phosphorus and potassium in each organ throughout the growing period of jerusalem artichoke. The test jerusalem artichoke variety was Qingyu 1. Results showed that nutrition concentration in each organ of jerusalem artichoke generally decreased with growing; absorption rate of nutrition consistently showed a double-peak curve ; the order of total nutrition accumulation was N 〉 P 〉 K. Nutrition was mainly contained in stems and leaves before tubers formed. Nutrition distribution rate in leaves was decreasing from tuber forming to first expansion period, while was increasing in tubers. Phosphorus and potassium in stems showed a single-peak curve, nutrition distribution rate in stems and leaves decreased rapidly while it increased in tubers after tuber expanded.