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多年来国内外对核桃栽培技术及基础理论进行了广泛的研究。但是对早实丰产研究报道尚少。1981年西班牙报道了采用矮化、密植方式栽植核桃,每亩仅栽10～13株,获得18年生树亩产147kg坚果产量。国内八十年代相继建立早实丰产园。为此,林业部“七五”规划中制定了在全国进行核桃早
Over the years at home and abroad walnut cultivation techniques and basic theory conducted a wide range of research. However, there are few reports on the high yield of early fruit. In 1981 Spain reported the use of dwarfing, planting close planting walnut, planted only 10 to 13 plants per acre, access to 18-year-old tree yield 147kg nuts. In the eighties have established as early as real abundance of garden. To this end, the “Seventh Five-Year Plan” formulated by the Ministry of Forestry has started walnut early in the country