杉木扦插苗生长规律与成苗质量的研究

STNDIES ON THE GROWTH AND QUALITY IN THE CUTTING STOCK OF CHNESE FIR ( CUNNINGHAMIA LANCEOLATA HOOK )

根据试验结果,对杉木实生苗、萌条扦插苗和苗梢扦插苗的生长过程和质量进行了分析。结果表明:扦插苗的年生长节律与实生苗基本一致,生长盛期为8—10月中旬。两类苗木的质量,除了平均高、冠根比和合格苗的百分率差异不显著外,其它各项指标,扦插苗均显著或极显著地优于实生苗。两种扦插苗之间,除一级侧枝长度和Ⅰ级苗百分率差异达显著和极显著水平外,其它各项指标都无差异。

We have analyzed the growth and quality of the one-year-old nursery stock of chinese fir by analysis of variance. The results showed that the growth pattern of the cutting stock is smailar to that of the seedlings. The fast-growing periods are from early August to mid Oclober. Among the attributes of quality, differences in average height, shoot/root ratio(T/R)and percentage of the stock coming up to the standard of planting stock are not significant between catling stock and secdings, while the other trais of cutting stock are significantly better than those of the seedlings. Between the cutting stock from the coppice shoots in the cuttings orchard and from the top shoots of the remaining small cuttings, the quality tvails were not different except the length of primary branches and the percentages of I-grading plants. Tius the study showed that the quality of the cutting stock is better than that of the seedlings, and that the cutting stock from the top shoots of the ramaining small cuttings is better than those from the sprouting shoots.