缺铁失绿梨树强力树干注射铁肥的效果 Ⅱ.对树体中各种营养元素消长的影响

Effect of Pressure Trunk Injection of Iron Fertilizer on Iron Chlorotic Pear Trees Ⅱ.Effect of Injection of Iron Fertilizer on Various Nutrients in the Trees

强力树干注射铁肥对缺铁失绿梨树树体各种营养元素的影响表明,注射铁肥提高了叶子铁及叶子氮、磷等非金属元素的含量,降低了叶子钙、镁和锰等金属元素的含量。注铁后,叶子全铁含量与有效铁含量之间呈极显著的直线正相关,相关系数为0.9842。对注铁改善树体营养平衡状况和减轻盐害作用的机理进行了初步探讨。

The effect of pressure trunk injection of iron fertilizer on the concentrations of various nutrients in chloroic pear trees was studied in this paper. It was found that injection of iron fertilizer increased the contents of Fe and non metal nutrients such'as N and P, and decreased the contents of Ca,Mg and Mn in leaves. There existed a significant positive linear correlation between total Fe and active Fe in leaves after injection of iron fertilizer,the coefficient of correlation being 0.9842. In addition,the possible mechanisms for improvement injection of iron fertilizer were discussed.