乌桕1年生播种苗生长规律及育苗技术

A study on growth rhythm of one-year seedlings and nursery techniques for Sapium sebiferum

乌桕是重要的经济和绿化树种。以乌桕1年生播种苗为研究对象,测定了乌桕在江淮地区播种育苗的生长参数。结果表明,3月18日播种后,乌桕种子出苗率为98%,幼苗1年生平均苗高为135.6 cm,平均地径为1.54cm;苗高与地径生长曲线符合Logistic生长模型,并且可以将幼苗年生长过程划分为出苗期、生长初期、生长盛期、生长减缓期和生长后期6个生长期。进一步对乌桕根系的生长规律进行研究,结果表明乌桕为典型的深根性树种,根长与苗高显著相关,相关系数为0.991。

Tallow tree（Sapium sebiferum） is a valuable plant for its economy and afforestation function.In this research,the parameters on sowing and seedling raising of tallow tree were investigated.The results indicated that the average rate of seedling emergence reached 98%.The average height and average diameter of one year old seedlings were 135.6 cm and 1.54 cm respectively.The growth curve of seedling height and diameter could be fitted by Logistic model,which can be divided into 6 periods.Further investigation found that the correlation between root length and seedling height was significant,with the correlation coefficient of 0.991.