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一、培育壮苗。1.培育健壮的砧木苗。核桃育苗多用普通核桃(厚壳核桃、铁核桃)的实生苗作砧木。留种用的核桃应适当晚采,核桃采后可将种子晒干后用沙藏处理,选择背风向阳、地下水位低的地方,按照种子的多少,挖成大小适当的坑。在坑底铺10～12cm 厚的一层潮湿沙,同时在坑中央竖一捆直径60～10cm 的草把,以便通风。然后铺平一层种子,倒入一层沙,层层相间,直到离地面12～15cm 时,再封一层沙,与地面相平,最后在上面封土,堆成小土堆,两侧挖设排水沟,以免水浸,次年春初播种。播种前应进行催
First, nurturing strong seedlings. 1. Cultivate robust rootstock seedlings. Walnut nursery with ordinary walnuts (thick-walled walnuts, walnuts) of the seedlings for rootstock. Walnut seedlings should be appropriate for late mining, after the harvest of walnuts seeds can be dried with sand handling, choose leeward sunny, low groundwater level, according to the number of seeds, dug into the appropriate size pit. At the bottom of the pit shop a layer of 10 ~ 12cm thick damp sand, while a vertical bundle of grass diameter 60 ~ 10cm in the pit for ventilation. Then paved a layer of seeds, into a layer of sand, layers of white, until the ground 12 ~ 15cm, and then seal a layer of sand, and the ground level, and finally in the top of the earth, piled into small mound, both sides digging Set drains, so as not to be flooded, sowed the following spring. Promote before sowing