文献类型： 外文期刊

第一作者： Geng Yuhui

作者： Geng Yuhui;Cao Guojun;Wang Shuhua;Wang Lichun

作者机构：

关键词： high yield; K accumulation; potassium; remobilized K; spring maize

期刊名称：JOURNAL OF PLANT NUTRITION （ 影响因子：1.707； 五年影响因子：1.645 ）

ISSN： 0190-4167

年卷期： 2019 年 42 卷 11-12 期

页码：

收录情况： SCI

摘要： Potassium (K) plays an important role in maize yield, but K accumulation characteristics in high yielding maize is still not well documented. A two-year field experiment was conducted to investigate the K accumulation characteristics of high yield (HY)(>15 t ha(-1)?spring maize compared with medium yield (MY)(10-15 t ha(-1)), and low yield (LY)(<10 t ha(-1)). The maximum K accumulation stage in maize appeared between V6 and V12 stage (LY, MY, and HY was 125.46, 138.05, and 146.22 kg ha(-1), respectively). Most of the K (94.27-97.13%) was accumulated during vegetative stages. HY exhibited a significantly higher K accumulation than either MY or LY. For different organs, the K remobilization amount of leaf was the highest, and the remobilization amount of stalk was the lowest, the K remobilization amount of leaf and stalk showed as HY < MY < LY, same as the total K remobilization amount, but the K remobilization amount of sheath and husk plus cob showed the opposite order. These results indicated that sufficient nutrient supply for maize can not only accumulate more K but also delay leaf senescence and maintain high photosynthetic activity, resulting in reduced K remobilization from vegetative organs, and reduced K loss in whole plant.

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