养蚕先栽桑,栽桑先育苗。哲盟每年四月下旬至五月上、中旬嫁接桑树,成活率仅20—40%,最高年份也不过45%左右,而且是今年嫁接,明年才能定植建园。为什么桑树嫁接成活率不高呢?主要原因是嫁接期间春风大,昼夜温差大,四,五月份气温月较差为15～20℃左右,白天气温地温较高,砧木树液苏活流动,而夜间温度急剧下降,砧木树液又处于滞流状态,因此影响了桑树嫁接后的愈合与成活。为了解决这个问题,我们 Sericulture first mulberry, planting mulberry first nursery. Militia late April each year to May, mulberry trees in mid-grafting, the survival rate of only 20-40%, but the highest year, but about 45%, but this year grafting, planting garden next year. Why mulberry grafting survival rate is not high? The main reason is that during the grafting spring breeze, large temperature difference between day and night, in April and May the monthly temperature difference of about 15 ~ 20 ℃, during the day the temperature higher ground temperature, rootstock sap flow, and Night temperature dropped sharply, rootstock sap flow in a stagnant state, thus affecting the mulberry healing and survival. In order to solve this problem, we