不同肥料配施对矮砧密植苹果幼树生长发育的影响

Effects of Different Fertilizer Combinations on the Growth and Development of Young Apple Trees with Dwarf Rootstock and Dense Planting

以当年栽植矮砧密植苹果幼树为供试材料,分别在5月21日、6月1日、6月11日施入不同配比的硝酸铵钙、磷酸一铵以及硝酸钾,探究其对苹果幼树生长发育的影响。结果表明,不同肥料配施可增加‘福布瑞斯’‘红思尼克’‘秦脆’等不同品种矮砧密植幼树的主干直径、树体高度、有效侧枝数量以及中央领导干延长枝生长量,且均在3种肥料配施时达到最大值;且同一品种7月份幼树上述指标的生长量显著高于6月份。综合分析,整个生长期每次施入硝酸铵钙30 g/株、磷酸一铵3 g/株、硝酸钾3.5 g/株,共施3次,效果最佳。

The effects of different proportions of calcium ammonium nitrate,mono-ammonium phosphate and potassium nitrate on the growth and development of apple saplings planted in short anvus were investigated on May 21,June 1 and June 11,respectively.The results showed that the diameter of trunk,height of body,number of effective lateral branches and growth of central leading stem extension branches of different varieties of‘Forbrith’‘Red Snick’and‘Qinqiu’were increased by different fertilizer ratio,and the maximum value was reached when the three fertilizers were applied together.In addition,the growth of above indexes of young trees of the same variety in July was significantly higher than that in June.Comprehensive analysis showed that the best effect was to apply ammonium nitrate calcium 30 g/plant,monoammonium phosphate 3 g/plant and potassium nitrate 3.5 g/plant for 3 times during the whole plant period.