近几年来,我县不少村利用沙滩地发展了较大面积的长把梨生产。由于沙地保水保肥能力差,致使有的成为“小老树”。为了解决这一问题,1980年开始在芦头乡北树口村,对1976年栽植的长把梨树进行了深翻改土试验,现将结果整理报告如下。一、材料与方法供试品种为黄县长把梨树龄5年生的初结果树,株行距4×5米。土壤为河滩沙 In recent years, many counties in our county have used the beach to develop a large area of ​​long pear production. Due to the sand poor water retention and conservation, resulting in some become “little old tree.” In order to solve this problem, beginning in 1980, North Shukou Village, Lu Tou Township, the pear planted in 1976 conducted a deep soil test, the results are summarized below. First, the material and methods for the test varieties Huang County, the pears tree age of 5-year-old tree, spacing 4 × 5 meters. The soil is beach sand