东北林业大学城市林业示范基地蒙古栎种群扩散研究

Research on Population Dispersal of Quercus mongolica in the City Forestry Demonstration Base of Northeast Forestry University

2010—2012年,在东北林业大学城市林业示范基地内蒙古栎林周边的胡桃楸林、樟子松林、水曲柳林和白桦林内,采用样方法和样带法研究了蒙古栎种子和幼苗的密度,开展了蒙古栎种群扩散研究。结果表明:除2011年没有在水曲柳林内发现有活力的蒙古栎种子外,在各年份各林分中均发现有活力的蒙古栎种子。2010年有活力的蒙古栎种子在胡桃楸林、樟子松林、水曲柳林和白桦林内的密度分别为(0.5±1.2)、(0.5±1.1)、(0.5±1.1)、(0.7±1.5)粒/m2;2011年分别为(0.1±0.3)、(0.2±0.5)、(0.0±0.0)、(0.2±0.4)粒/m2;2012年分别为(1.5±4.3)、(0.4±1.3)、(0.6±1.1)、(1.4±4.3)粒/m2,这为蒙古栎幼苗建成提供了可能。不同林分蒙古栎幼苗密度呈显著差异,蒙古栎幼苗密度最大的林分是樟子松林:2010年(1 657.1±954.7)株/hm2;2011年(5 935.7±3 424.9)株/hm2;2012年(3 242.9±1 870.2)株/hm2,其后依次是在白桦林:2010年(1 242.9±715.5)株/hm2;2011年(3 457.1±1 993.9)株/hm2;2012年(1 814.3±1 045.4)株/hm2;水曲柳林:2010年(964.3±554.7)株/hm2;2011年(2 307.1±1 330.0)株/hm2;2012年:(1 121.4±645.4)株/hm2;胡桃楸林:2010年(250.0±142.3)株/hm2;2011年(542.9±311.3)株/hm2;2012年(228.6±129.9)株/hm2。2010—2012年,4种林分内的一年生幼苗数量比重分别为44.7%、49.3%、38.1%。

The Mongolian oak population dispersal had been studied by using methods of quadrats and strips in Manchurian walnut （Juglans mandshuriea ）, scotch pine （ Pinus sylvestnis ）, northeast China ash （ Betula platyphylla ） and white birch （ Fraxinus mandshurica ） around Mongolian oak （Quercus mongolica）in the City forestry demonstration base of Northeast Forestry University from 2010 to 2012. The results showed that except that vitality Mongolian oak seeds were not founded in the northeast China ash forest in 2011 ,we all found the vitality Mongolian oak seeds in four stands in three years. In 2010,the vitality Mongolian oak seeds respectively were （0.5±l.2）grain/m2, （0.5：t：1.1）grain/m2, （0.5：1：1.1）grain/m2 and （0.7：1：1.5） grain/m2 in Manchurian walnut,scotch pine,northeast China ash and white birch forest;In 2011 ,the vitality Mongolian oak seeds respectively were （0.1 ±0.3 ） grain/m2, （ 0.2±0.5 ） grain/m2, （0.0±0.0） grain/m2 and （0.2±0.4） grain/m2; In 2012, the vitality Mongolian oak seeds respectively were （ 1.5 ±4.3 ） grain/m2, （0.4± 1.3 ）grain/m2, （0.6± 1.1 ）grain/m2 and （1.4±4.3）grain/m2, that had provided the possibility for seedling establishment.The density of Mongolian oak＇s seedling was significant difference in different stands in three years.The maximum seedling density was in Scotch pine forest, those were（ 1 657±1954.7） Ind./hm2 in 2010, （5 935.7±3 424.9） Ind./hm2 in 2011 and（3 242.9±1 870.2）Ind./hm2 in 2012,respectively. Followed by white birch forest ,there were（1 242.9±715.5）Ind./hm2 in 2010, （3 457.1±1 993.9）lud./hm2 in 2011 and（ 1 814.3±1 045.4）Ind./hm2 in 2012. Northeast China ash forest were（964.3±554.7）Ind./hm2 in 2010, （2 307.1±1 330.0）Ind./hm2 in 2011 and（1 12t.4±645.4）Ind./hm2 in 2012.Manchurian walnut forest were （250.0：t：142.3）Ind./hm2 in 2010, （542.9±311.3 ）lnd./hm2 in 2011 and （228.6±129.9）Ind./hm2 in 2012 ,respectively.The average proportion of the number of annual seedling respectively were 44.7% in 2010,49.3% in 2011 and 38.1% in 2012.