板栗夏季硬枝贴接技术

板栗于１－２月播种育砧，当年夏季（５－７月）砧木地径达０．４ｃｍ以上，嫁接部位（离地面５．０ｃｍ）直径０．３ｃｍ以上时，采用硬枝贴接技术嫁接。１１月调查结果表明，成活率在８５％以上，嫁接苗地径在０．６ｃｍ以上。苗木高度与品种和嫁接时期相关；长枝型如魁栗生长量大，嫁接可在７月２０日以前；短枝型如短刺毛板红生长量少，嫁接应在６月２０日之前。当年嫁苗平均高生长量为７１．８ｃｍ，达到出国要求。

Chinese chestnut:patch hardwood grafting in summer

Chinese chestnut seeds were sowed for breeding stocks in January to February.During May to July,patch hardwood grafting was taken when the ground diameter of stock reached over 0 4 cm and the diameter of grafting location (above ground 5 0 cm) growed over 0 3 cm.The results in November indicated that percentage grafting success was over 85%,and ground diameter of grafted seedling stabilized over 0 6 cm.Seedling height related to variety and grafting season.Long branch varieties,e.g.Kuili,could be grafted before 20,July,and short branch varieties,e.g.Duancimaobanhong,should be grafted before 20,June.The average current increament in height of grafted seedling reached 71 8 cm.For this,sowing,grafting and planting for Chinese chestnut could be made in the same year.