不同产地山桐子苗木苗期生长规律初探

为研究不同种源山桐子苗木生长规律,促进山桐子繁育进程,对来自12个不同产地的山桐子苗木生长性状进行测定分析。结果显示,各产地山桐子苗木苗高生长趋势基本一致,均在7月1日至9月19日增长迅速,平均增长1.04cm/d,而地径生长期限较长,在9月19日至10月30日仍有明显增长;利用苗木苗高、地径年生长量2个指标进行综合分析,按种源划分,以分宜种源山桐子苗木生长最快,其苗高、地径年生长量分别达到140.53cm、13.82mm,朝天、元坝和仙居种源其次,而奉化、上犹、黄山种源山桐子苗木生长较慢,其中以黄山种源最慢,苗高、地径年生长量仅为103.25cm、10.02mm;12个产地间苗木苗高生长差异显著,而区组间苗高、产地间和区组间地径生长差异均未达到显著水平。总体分析表明,不同产地间山桐子苗木生长量存在较大的差异。

Primary Studies on Growth Regulation of Seedling of Idesia polycarpa Maxim.from Different Populations

To study the growth rule of seedlings of Idesia polycarpa Maxim.from different populations,and to promote the breeding process,growth traits of seedlings of Idesia polycarpa Maxim.from twelve different populations were investigated and analyzed.The results were as follows: There were nearly no differences in growth trend of height of seedlings of Idesia polycarpa Maxim.among twelve different populations,and all grew rapidly between July 1 and September 19,average increment of growth was 1.04 cm/d;while growth period of the ground diameter was long,and there were significant increments from September 19 to October 30.Comprehensive analysis using one year growth mass of height and the ground diameter of seedlings,and division according to population,it was got that the growth of seedlings from Fenyi population was the fast,annual growth of height and ground diameter were 140.53 cm、13.82 mm,followed by the next were population of Chaotian,Yuanba and Xianju.,the growth of seedlings from populations of Fenghua,Shangyou and Huangshan were slower,of which Huangshan population was the slowest and annual growth of height and ground diameter were 103.25 cm、10.02 mm.There were significant differences in growth of height of seedlings between twelve populations,but no obvious difference in growth of height of seedlings was found between groups and in growth of the ground diameter between population and groups.Overall analysis indicated that there was obvious difference in growth mass of seedlings of Idesia polycarpa Maxim.from different populations.