苹果和梨由稀植朝密植方向发展,这已成为世界各国果树栽培制度改革的一个总趋势。但是,冬季严寒地区要不要搞密植?怎么搞法?尚未见有报道。我们认为有必要做些调查研究和试验工作来回答这个问题。为此,在辽宁省农科院的组织下,从1976年组成了辽宁省北部地区“果树矮化密植栽培技术研究”协作组,开始这个课题的研究。现将我们在沈阳市于洪 The development of apple and pear from thin planting to dense planting has become a general trend of the reform of the fruit tree cultivation system in various countries of the world. However, the winter cold areas should not engage in close planting? How to engage in law? There have been no reports. We think it is necessary to do some research and experimental work to answer this question. To this end, under the organization of Liaoning Provincial Academy of Agricultural Sciences, 1976 from the formation of the northern region of Liaoning Province “Dwarf dense planting cultivation technology research” collaboration group, began this research. Now we are in Hong Hong, Shenyang