果树高换是将低产树换成高产树,劣质品种换成优质品种见效较快的办法之一。抓好柑桔高换成活率是柑桔高换成败的关键,成活率高,形成树冠快,恢复产量快,果农积极性高;柑桔高换一般在春、秋两季进行。秋季时间长,气温较稳定,接穗来源多,采用腹接法。春季气温不稳定,接穗来源少,过早,气温低,过迟,接穗抽发,因此春季高换时间较短。但春季采用切接法,恢复树冠快,一般当年高换当年 High fruit trees is the low-yielding trees replaced by high-yield trees, poor quality varieties replaced by high-quality varieties one of the quick results. Grasp citrus high survival rate is the key to success or failure of high citrus, high survival rate, the formation of crown fast recovery of yield, fruit farmers enthusiasm; citrus high for the general in the spring and autumn seasons. Long fall, the temperature is more stable, more sources of scion, the use of abdominal approach. Spring instability in temperature, less source of scion, premature, low temperature, too late, scion pumping, so spring time for a shorter time. However, the spring used to cut the law, the restoration of fast crown, the general then high for the year