蒙古栎育苗试验

Seedling Raising Experiment on Quercus mongolica

蒙古栎是辽西地区的地带性树种,能与油松形成稳定的松栎混交林。在蒙古栎植苗造林试验中发现,蒙古栎植苗造林成活率、保存率不高,重要原因之一是蒙古栎形成的吸收根量少。对此,采用垫砖法、去芽法和多芽法进行了蒙古栎育苗试验。结果表明,3种方法都能增加苗木的侧须根数量,但以垫砖法效果更为明显,可以作为蒙古栎少量育苗的简便方法而应用。如果大量育苗,可以试用截根育苗法。去芽法须进一步催芽,待重新萌发出新芽以后再进行播种。多芽法由于苗木生长较差,不宜采用。

Quercus mongolica is a zonal tree species in western Liaoning province and can form stable mixed forest with Pinus tabulaeformis. In afforestation experiments, it was found that the survival rate of Q. mongolica in tree planting was very low. One of the most important reasons was that the seedlings of Q.mongolica cannot develop a great number of adsorptive roots. Brick-laying, radicle-breaking off and multiple-radicle methods were tried to raise Q. mongolica seedlings of more adsorptive roots. The results showed that all of these three methods could increase the lateral and fibrous root number of Q. mongolica seedlings, and brick-laying method was the best and could be used as a simple method for raising Q. mongolica seedlings when there were not many seedlings needed. A seedling raising method of cutting the main root could be tried if a large number of seedlings were to be raised. If radicle-breaking off was used, it should be wait until new radicles formed before sowing. Multiple-radicle method should not be used because the growth of the seedlings raised by this method was not satisfactory.