一、种子的选挑 作为板栗树砧木的种子有板栗和毛栗两种。当栗蓬呈黄色并有60％果苞开裂时采收,采下的栗种先不去蓬而堆放2～3天,同时喷施80％的敌敌畏600倍液并加盖塑料薄膜、青草或草苫密封闷堆;或用溴甲烷熏蒸消除栗种中的栗实象鼻虫的幼虫,然后再去蓬选挑籽粒饱满、颗大粒重、壳色深老、略带光泽并无机械损伤的健壮籽为种。选好的种子再用0.05％2.4-D加500倍托布津浸种,以防沙藏过程中种子腐败。 First, the selection of seeds As chestnut tree rootstock seeds chestnut and chestnut two. When the chestnut Punta yellow and 60% of the fruit bud cracking when harvesting chestnut species do not go to Peng and stacked for 2 to 3 days, while spraying 80% of dichlorvos 600 times and affixed plastic film, grass or Grass bream sealed bored pile; or fumigation with methyl bromide to eliminate chestnut beetles in the chestnut weevil larvae, and then go to Punta pick seed full, large grain weight, shell color deep old, slightly shiny and no mechanical damage robust Seeds for the species. The selected seeds are then soaked in 0.05% 2.4-D plus 500 times Topuzin to prevent seed spoilage during sand storage.