摘要
银杏种粒大小影响种胚生长所需养分，不同种粒大小的１年生播种苗的生长量具显著差异。４年生播种苗的第１，２，３，４年的生长量分别占总生长量的６．５％，１０．８％，２６．６％和５６．１％。采用不同栽培措施处理表明，根际覆草促进播种苗的根系生长发育，加速苗木的后期生长，减小不同种粒大小间苗木生长的差异，与６００粒／ｋｇ以内的用种大小配套使用，不仅可使４年生播种苗达到株高１６６．３ｃｍ，径粗１．９ｃｍ，而且可节约用种成本６０００元／ｈｍ￣２。
Ginkgo seed weight affected the nutrient required by the embryO growth, so the significant dif-ferences existed in the one-year-old seedlings′growth volume from the different seed weight.For the four-year-old seedling, the growth volume of the first,second,third and fourth year seized 6.5%, 10.8%,26.6%and 56.1%of the total growth volume respectively.It indicated to treat the seedlings by the differentculture measures that the sod mulch over soil surrounding the seedlings promoted the roots grovvth and devel-opment of the seedlings and speeded their later growth,so reduced the differences in the growth volume of theseedlings from the different seed size.The combination of the sod mulch and the seed size within 600 grainsper kilogram not only made the four-year-old seedling 166.14cm high,1.88cm in dlameter,but also could save 6000 yuan per hm￣2 for seed costs.
出处
《江苏农学院学报》
CSCD
1995年第2期51-54,共4页
Jiangsu Agricultural Research
基金
林业部"七五"重点
关键词
银杏
栽培
种子处理
生长效应
ginkgo biloba
sowing
culture technique
seed treatrnent
growth rate
