京东板栗低产树改接优良品种当年丰产技术研究

为解决遵化市部分实生老栗树产量极低、存在部分低产栗园等问题，于2012年在遵化市马兰峪镇魏进河板栗园进行了低产板栗树高接换优试验。结果表明，通过改接燕山早丰、遵化短刺和紫珀等优良品种，嫁接成活率达到了97．6％～98．2％，改接当年3个品种单株产量分别为1．77kg、1．83k和1．84kg，极显著高于对照；改接第2年3个品种单株产量分别为3．0kg、3．2kg、2．8kg，极显著高于对照，其中以改接遵化短刺产量最高，实现了改接当年丰产、第2年高产。

Study on the high yield technique of Jingdong chestnut tree by grafting superior cultivars in the grafting year

In order to solve the problems of very low yield of some old seedling chestnut trees and some low yield chestnut orchards in Zunhua City, the low yield chestnut trees were top- grafted with superior cultivar in Weijinhe Chestnut Orchard of Malanyu Town in 2012. The results showed that the grafting survival rate of the three superior cultivars of Yanshanza- ofeng, Zunhuaduanci and Zipo by top grafting reached to 97.6~98.2~, with the yield per plant up to 1.77 kg, 1.83 kg and 1.84 kg respectively in the grafting year, which was very significantly higher than that of non-grafted trees. And the yield per plant in the following year after grafted arriving at 3.0 kg, 3.2 kg and 2.8 kg respectively, which was very signifi- cantly higher than that of non-grafted trees, with the highest yield of grafted Zunhuaduanci. By applying this technique, good yield was realized in the grafting year, followed by high yield in the ensuing year.