为了提高我国板栗丰产栽培技术水平,改变晚实低产面貌,1983～1987年,林业部组织有关科研单位,对全国29个重点产栗县54块丰产林进行了调查研究,其中实生栗林1042亩。连续4年平均亩产111.1kg;嫁接栗林397.5亩,连续4年平均亩产135.4kg。在调查研究、总结现有经验和科研成果的基础 In order to improve the level of Chinese chestnut high yielding cultivation techniques and change late-night low-yielding appearances, from 1983 to 1987, the Ministry of Forestry organized relevant scientific research units to conduct a survey and study on 54 high yielding forests in 29 key producing areas in China, including 1042 mu of chestnut forest. For 4 consecutive years, the average yield per mu is 111.1kg; the grafted Li-lin is 397.5 mu and the average per mu yield is 135.4kg for 4 consecutive years. In the survey, summarize the basis of existing experience and scientific research