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 / 6 6 6 7m2 ,为降低苗期辐射强度、提高幼苗的抗灼伤能力应遮荫 2 0 %～ 4 0 % ,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 72h ,幼芽在 - 2℃ 1h出现伤害 ,- 4℃全部死亡 ,初生叶在 - 4℃ 1h14 %死亡 ,- 6℃ 1h全部死亡 ,发育叶 - 8℃ 1h 2 6 %存活 ,- 10℃
Sowing time,sowing density,shade effect and cold resistance of ginkgo seedling were conducted in south Hebei.The result showed that suitable sowing time was middle of March;proper density was 60 000 grains/666 7m 2;seedling could live 72 h at 0 ℃,bud injured at -2 ℃ for 1 h and dead at -4 ℃;new leaves were dead by 14% at -4 ℃ for 1 h and all dead at -6 ℃ for 1 h;growth leaves survived 26% at -8 ℃ for 1 h and all dead at -10 ℃ for 1 h.
出处
《华北农学报》
CSCD
北大核心
2001年第4期136-139,共4页
Acta Agriculturae Boreali-Sinica
基金
河北省科学技术发展与研究计划 (96 2 30 2 16D)
