山楂及其变种大山楂是我国最早栽培的果树之一,据记载在北京地区栽培已有一千多年的历史,并且是食品工业和药用的传统原料。随着经济的发展,人民生活水平的提高,以及药用价值的进一步开发,社会、市场对山楂的需求量愈来愈大,然而目前存在的特殊问题是优质、丰产的品种少,成熟期集中,为了提高山楂的栽培水平,从山楂资 Hawthorn and its variant Big Hawthorn is one of the earliest cultivated fruit trees in China. It has been documented that it has been cultivated in Beijing for over a thousand years and is also a traditional raw material for the food industry and medicine. With the development of economy, improvement of people’s living standards and further development of medicinal value, the demand for hawthorn in society and the market is getting larger and larger. However, the special problems currently existing are high quality, high yielding varieties, In order to improve the cultivation of hawthorn, hawthorn capital