由于市场行情的变化,酥梨、杂梨价格悬殊很大,许多果农纷纷高接换头,改杂为酥。从最近几年果园场大量改接后的情况看,有以下几个问题值得注意。(一)生长过旺、抽生的徒长枝条多。出现这个问题的主要原因,①整株接穗数量太少,以致造成地下部分与地上部分不平衡。②接穗普遍太短,只是1—2个芽。生长点总量小,刺激太强,因此,抽生长枝条;③接穗的角度直 Due to changes in market conditions, pear, pear great price disparity, many growers have high takeover, to miscellaneous crisp. From the situation in recent years after a large number of orchard to change, there are several issues worth noting. (A) over-growth, leggy branches shoot more. The main reason for this problem, ① the number of whole scion too small, resulting in underground parts of the ground and part of the imbalance. ② scion generally too short, only 1-2 buds. Small total growth point, stimulation is too strong, so pumping growth branches; ③ scion straight