摘要
以辽宁省章古台沙地樟子松(Pinus sylvestris var.mongolica)人工林为研究对象,采用因子分析方法,研究了沙地樟子松人工林天然更新环境因素的影响。结果表明,沙丘的坡向是章古台沙地樟子松天然更新质量的关键环境因子。半阴坡为樟子松天然更新提供了适宜的水分和光照条件,天然更新幼树株数极显著多于其他坡向。根据章古台沙地樟子松天然更新潜力,将地形因子划分为3种类型,适宜天然更新类型:半阴坡;可持续人工促进类型:阴坡、平缓沙地、半阳坡,辅以整地、浇水等人工措施能更好地促进樟子松天新更新;天然更新不宜类型:阳坡。郁闭度、枯枝落叶层厚度、积沙层厚度、植被盖度等对天然更新也起到了重要作用,在郁闭度0.3~0.6、枯枝落叶层厚度1~2 cm、积沙层厚度>10 cm、植被盖度>85%条件下,天然更新的效果最好。
Taking the Pinus sylvestris var.mongolica plantation in Zhanggutai sandy land of Liaoning Province as the research object,the environmental factors impacting natural regeneration of P.sylvestris plantation were studied by factor analysis method.The results showed that the slope direction of sand dunes was the key environmental factor for the natural regeneration quality of P.sylvestris.The semi-shady slope provided suitable water and light conditions for the natural regeneration of P.sylvestris.The number of naturally regenerated saplings was significantly more than that of other slopes.According to the natural regeneration potential of P.sylvestris in Zhanggutai sandy land,the natural regeneration was divided into three types.Natural regeneration suitable type:semi-shain slope;Sustainable artificial promotion type:shady slope,gentle sandy land and semi-sunny slope,it was better to promote natural regeneration by artificial measures such as land preparation and watering;Natural regeneration was not suitable type:sunny slope.The canopy density,thickness of the litter layer,thickness of the sand layer and vegetation coverage also played important roles in natural regeneration.The effect of natural regeneration was best under the condition of canopy density of 0.3 to 0.6,thickness of litter layer was 1 to 2 cm,thickness of sand layer was>10 cm,and vegetation coverage was>85%.
作者
曹怡立
刘淑玲
张日升
CAO Yi-li;LIU Shu-ling;ZHANG Ri-sheng(Liaoning Institute of Sandy Land Control and Utilization,Fuxin,Liaoning 123000;Liaoning Zhanggutai Horqin Desert Ecosystem Research Station,Fuxin,Liaoning 123000)
出处
《安徽农业科学》
CAS
2019年第23期121-123,126,共4页
Journal of Anhui Agricultural Sciences
基金
国家重点研发计划课题(2016YFC0500803)
关键词
樟子松
天然更新
环境因子
Pinus sylvestris var.mongolica
Natural regeneration
Environmental factor
