大扁杏密植效应的研究孟宪武，张魁，耿占礼（辽宁省干旱地区造林研究所１２２４００）大扁杏是适应性强、结果早、经济价值高的经济树种，适宜在我国“三北”地区大力发展。为了探讨在辽西干旱贫瘠山地条件下，实现大扁杏早期丰产稳产的可能性，我们于１９８２年春定植了... Daping apricot is an economic tree species with strong adaptability, early fruiting and high economic value, and is suitable for vigorously developing the “Three North” regions in China development of. In order to explore the conditions of drought in barren mountains in western Liaoning, to achieve the early yield and stability of the big flat apricot, we planted in the spring of 1982 ...