平茬对暴马丁香生长的影响

通过对暴马丁香播种苗进行不同苗龄的平茬试验,研究平茬对暴马丁香高生长、粗生长、树形指数影响。结果表明,平茬对树干粗生长影响并不显著,而对树体高生长影响明显,5年间1年生平茬苗和2年生平茬苗分别比对照提高了53.9%和33.8%。平茬可以显著提高树干枝下高,1年生平茬苗和2年生平茬苗分别比未平茬苗提高183.9%和279.7%;平茬处理可以培养出直立的主干,彻底解决了暴马丁香树形指数差的问题,从而获得较高经济效益。

Effect of stumping on the growth of Syringa reticulate

The effects of stumping on height growth,diameter growth and tree index were investigated by a stumping experiment on seedlings of Syringa reticulate with different age.The results showed that stumping had no significant influence on trunk diameter growth,however,it had significant influence on tree height growth and height of under-branches.The height growth and height of under-branches in seedlings of Syringa reticulata stumped at 1 and 2 year old were higher by 53.9 and 33.8%,and 183.9 and 279.7%,respectively,than those in seedlings without stumping.Moreover,the stumping treatment could keep trunk upright and solve completely the problem that the trunk of Syringa reticulata was easy to bend.So,the stumping treatment could gain higher economic efficiency.