中国沙棘种群在沙漠高速公路中的生态适应性研究

沙漠防护一直是沙漠地区修建公路需重点解决的问题之一。本着就地取材和生态适应性的原则,对高速公路通行区域进行了生物防护沙漠试验,分析研究了中国沙棘在沙漠高速公路不同方向路基边坡的种群特征和生态适应性。研究表明,同一坡向中国沙棘种群的生长特征、生物量及其分配格局等均无显著差异,其生态适应性具有趋同性;在北坡和南坡之间,种群的生长特征、生物量及其分配格局等均有显著差异,其生态适应性具有趋异性。在实践中可根据坡向的水分特征和中国沙棘的生物生态学特性,在南坡宜适当加大造林密度,并加强土壤水分管理,以便提高造林效果和促进种群生长发育进程,使其尽早发挥沙漠防护的作用。

A Study on Ecological Adaptation of Hippophae Rhamniodes L.Subsp.Sinensis Population in Desert Expressway

Desert protection is an important problem to be solved for building highway in this area.On the basis of the policies of obtaining raw materials locally and ecological adaptation,biological protection-desert is tested in the expressway traffic districts,the ecological adaptation and plant population characteristics of Hippophae rhamniodes L.subsp.sinensis at different slope direction of expressway roadbed are studied.The results show that the growth characteristics,population biomass and the pattern of biomass allocation are without significant difference between the populations at the same slope direction,and they indicate a same adaptive strategy.However,the growth characteristics,population biomass and the pattern of biomass allocation indicate a significant difference between the populations at the different slope direction,and they take a different adaptive strategy.It can based on the moisture characteristics of slope direction and biochemical ecology in the practice,that is,densification arboriculture density adequately at southern slope,and enhancing the management of soil moisture which can enhance arboriculture efficiency and facilitate plant population growth process,to production desert protection early.