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向日葵各器官在不同生育期对氮、磷、钾营养素的吸收和运转规律是不同的。７对叶前，氮、磷营养素的吸收中心均为叶片。７对叶后，根、茎、叶中的氮、磷素含量迅速降低，以满足葵盘生长的需要。成熟期子实中的氮、磷素含量最高，分别占全株含量的５４６９％和７６３３％；７对叶前钾素吸收中心为茎秆，７对叶后，各器官中钾含量向葵盘中转送，到成熟期葵盘中钾含量达到最高值，而子实中钾含量却很低，分别占全株的２２７４％和６６４％。
Sunflower organs at different growth stages of nitrogen, phosphorus and potassium nutrients absorption and operation of the law is different. 7 pairs of leaf front, nitrogen and phosphorus nutrient absorption centers are leaves. 7 pairs of leaves, roots, stems and leaves of nitrogen and phosphorus content decreased rapidly to meet the needs of the growth of sunflower. The contents of nitrogen and phosphorus were the highest in the mature stage, accounting for 5469% and 7633% of the total plant content, respectively. Seven pairs of leaf anterior leaf potassium absorption centers were stems, The contents of K in the sunflower medium reached the highest value in the mature stage, while the potassium content in the fruit was very low, accounting for 2274% and 664% of the whole plant respectively.