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为了探索仁用杏在干旱地区的适宜栽植密度，作者于１９９０年春开展了其栽植密度试验。现将８年来的试验结果报告如下。试验是在河北蔚县北水泉镇北柏山村进行的。该地年平均气温５．９℃。无霜期１２６ｄ，年降水量３８２ｍｍ。试验园为平地，淡栗钙土。以一年生龙王帽杏嫁接
In order to explore apricot appropriate apricot planting density in arid areas, the author conducted its planting density test in the spring of 1990. Now eight years of test results are reported below. The experiment was carried out in Beipishan Village, Beishuiquan Town, Yuxian County, Hebei Province. The average annual temperature of 5.9 ℃. Frost-free period 126d, annual precipitation 382mm. Test ground for the flat, light chestnut soil. Dragon King Cap apricot grafted year