不同种源乌桕苗期生长特性

Growth characteristics of Sapium sebiferum seedlings from different provenances

为选择优良的乌桕苗木,通过收集不同种源优株乌桕种子进行播种育苗,观测种子及其幼苗植株生长特性,分析不同种源子代苗高、地径生长差异及其相关性。结果表明:不同种源子代幼苗在6月中旬进入速生期,7月进入生长高峰期,8月中旬进入缓慢生长期,10月生长速率下降且较快;不同种源优株子代苗高、地径生长呈显著差异;依据生长状况将子代幼苗划分为4类,其中编号21为种苗中最优。

In order to select fine seedling in Sapium sebiferum,seeds in Sapium sebiferum from difference provenances were sowed,growth characteristics of seed and seedling were observed,height and basal diameter of seedlings from different provenances and its relevant were analyzed.The results show that the fast growth period of seedlings from different provenances starts from middle June,the growth peak period starts from July,the slow growth period starts from middle August,growth speed is fast decreased after October.Height and basal diameter growth have significant differences among seedlings of superior plants from different provenances.According to growth status,young seedlings can be classified into 4 groups,of which No.21 is the optimal seed.