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1987～1991年对五莲县旱薄山地成年苹果树进行丰产技术开发,主要采取了穴贮肥水、深翻改土、树盘覆草及树形改造等措施.结果表明,15个乡镇3000多hm~2开发园土壤肥力、一级果率、树体结构等都优于对照园.开发园4年平均每666.7m~2产量2989.5kg,比对照园2488.0kg 增产501.5kg,经济效益显著.
From 1987 to 1991, the high-yielding technology was developed for the adult apple tree in the dry and thin mountainous area of Wulian County, mainly taking such measures as storage of potable fertilizer, deep soil amendment, tree-cover mulching and tree transformation, etc. The results showed that more than 3000 townships hm ~ 2 development garden soil fertility, a fruit rate, tree structure and so on are better than the control garden.Evelopment Park 4 years average 666.7m ~ 2 output 2989.5kg, than the control garden 2488.0kg yield 501.5kg, significant economic benefits.