陕西渭北7县苹果园树体结构参数调查研究

通过对陕西渭北7县不同果园苹果树体和群体结构的各项指标以及与产量之间关系的调查研究,得出该地区适宜的树高、冠径、覆盖率、枝组数量等各项指标及其与产量的相关方程。结果表明:7县不同果园苹果树平均高度265.9～350.1cm,冠径250.9～360.0cm;果园枝类组成均以短枝为主,中长枝比例次之,徒长枝的比例最少;不同果园枝果比为4～5∶1,叶果比为38～56∶1,枝叶比为1∶10～13,果园覆盖率为69.6%～81.0%。系统分析得出产量(y)与短枝比例和果园覆盖率(x)均呈显著正相关关系。

Investigation of Plant Architecture Parameters of Red Fuji Apple Tree in Weibei

An investigation was carried out on the relationship between the plant architecture parameters and the fruit yields of Fuji apple trees growing in different orchards in seven counties in Weibei plateau of Shaanxi,China.Related equations were obtained to describe the relationships between the fruit yields and different indices,including tree height,crown,coverage,number and types of branches.The results showed that the average tree height of different orchards in seven counties were 265.9-350.1 cm,and 250.9-360.0 cm for tree crown.The shoots consisted mainly of short ones,followed by middle and long shoots,and the least of developing shoots.Branch-fruit ratio was 4-5∶1,leaf-fruit ratio was 38-56∶1,branch-leaf ratio was 1∶10-13,and the orchard coverage rate was 69.6%-81.0%.The percentage of short shoots was significantly and positively correlated to the apple yield and so were the orchard coverage rate and yield.