1　高接换种树的标定和处理1 1　标定　标定对象为劣质、劣种树和实生树及需要品种搭配的树种。1 2　处理　根据龙眼抽梢发育特性 ,换种树标定后 ,可在龙眼采果后对龙眼主枝进行更新处理 ,利用锯断后的主枝萌生的新梢 ,在翌年 3～ 4月进行高接换种。锯口位置和接位的多少或高低 1 high pick tree calibration and processing of 1 1 calibration calibration objects for poor quality, inferior trees and real trees and species need to match the species. 1 2 treatment according to the longan shoot development characteristics, for a tree after calibration, the longan fruit picking after the main branch of the longan to update the use of sawing after the main branch of the sprout, in the next year 3 ~ April for high pick Another way. Sawing location and how much or how high or low