摘要： 在冀南地区对银杏进行了播种时期、播种密度、遮荫效果、幼苗耐寒性等试验，结果表明，银杏适宜播种期为3月中旬，适宜密度为6万粒/666.7m₂，为降低苗期辐射强度、提高幼苗的抗灼伤能力应遮荫20%~40%，并进行断胚根等技术措施；幼苗耐寒性试验表明，银杏幼苗可耐持续近冰点温度72 h，幼芽在-2℃ 1 h出现伤害，-℃全部死亡，初生叶在-4℃ 1h 14%死亡，-6℃ 1h全部死亡，发育叶-8℃ 1h 26%存活，-10℃ 1h全部死亡。

关键词: 银杏, 播期, 播种技术, 遮荫效果, 幼苗耐寒性

Abstract: Sowing time, sow ing density, shade effect and cold resistance of ginkgo seedling were conducted in south Hebei. The result show ed that suitable sow ing t ime was middle of March;proper density was 60000 grains/ 666.7m₂;seedling could live 72h at 0℃, bud injured at -2℃ for 1h and dead at -4℃; new leaves were dead by 14% at -4℃ for 1h and all dead at -6℃ for 1h; growth leaves survived 26% at -8℃ for 1h and all dead at -10℃ for 1h.

Key words: Ginkgo, Sowing time, Breeding technique, Shade effect, Cold resistance

中图分类号: 

• S792.95