【摘要】 以小麦品种Soissons为试验材料,探讨灌浆期钾在籽粒中的累积特性以及籽粒与旗叶叶片、旗叶叶鞘、节、节间、穗轴和颖壳钾含量的相关性。结果显示,随着灌浆时间延长,籽粒钾含量逐渐降低。在灌浆16 d时,籽粒钾累积速率达到最高,钾总量接近最大值。叶片、叶鞘、节间、穗轴和颖壳钾含量呈现先升高后下降趋势。相关分析显示,籽粒钾含量与叶鞘、节、节间和穗轴的钾含量呈负相关,与旗叶和颖壳钾含量呈正相关。表明小麦籽粒钾主要来自根系吸收和转运,并非旗叶钾的再利用。更多还原

【Abstract】 Using wheat variety Soissons as material,the characteristics of potassium( K) accumulation in wheat grains and K concentration correlation among grains,flag leaf blades,flag leaf sheaths,internodes,nodes,spike-stalks and glumes were explored in the study. The results showed that the K concentration in grains gradually decreased with the extension of filling time. At the 16 th day of filling time,the grain K accumulation rate reached the highest and the total K accumulation in grains was close to the maximum value. The K concentrations in flag leaf blades,flag leaf sheaths,internodes,spike-stalks and glumes increased firstly and then showed a trend of decrease. Correlation analysis showed that K concentration in grains existed negative correlations with that in flag leaf sheaths,nodes,internodes and spike-stalks,but positive correlations with glumes and flag leaf blades. The results indicated that the K in grains mainly came from absorption and transport from roots rather than reutilization of K in the flag leaves.更多还原