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为探讨山楂大树生物学指标与高产稳产的关系,1983年进行了调查。近三年来,又进行了多次验证调查和观察分析。整理报告如下。基本情况和调查方法本调查是在我乡东张村、东庄头村,以及于小村等3处山楂大树园进行的。3处山楂园,均座落在大沽河畔肥沃的沙壤土上水利条件好管理水平较高。品种都是莱西绵球。树龄40年生以上。行株距5～8米不等,自然半圆形树势,树冠覆盖率95％以
In order to investigate the relationship between the biological index of hawthorn tree and high and stable yield, a survey was conducted in 1983. In the past three years, a number of verification surveys and observation analyzes have been carried out. Finishing report is as follows. The basic situation and survey methods The survey was conducted in three townships: Dongzhang Village, Dongzhuangtou Village and Yucun Village. 3 Hawthorn Park, are located in the fertile sandy loam Dugu loam soil conditions are good management of a higher level. Lacey varieties are cotton balls. Tree age 40 years old or more. Line spacing ranging from 5 to 8 meters, natural semicircular tree shores, crown 95% coverage