霍山山地草甸优势种功能性状对土壤水解氮和水分含量的影响

Effects of the Functional Traits on Soil Nitrogen and Water Content of Mountain Meadow in Huo Mountain

植物功能性状是植物在适应环境过程中,所表现出来的生长、生存和繁殖的个体特征,影响着生态系统过程和功能.基于此,本文研究了霍山山地草甸台地和坡地的优势种株高和比叶面积与土壤水解氮和土壤含水量之间的关系.结果表明,坡地优势种株高与土壤的含水量(R2=0.681,P<0.01)和水解氮含量(R2=0.543,P<0.05)呈显著负相关,而比叶面积与土壤的含水量和水解氮含量无相关性.台地优势种株高、比叶面积均与土壤的含水量和水解氮含量无相关性.以上结果说明,生物量假说和质量比例假说的优势种影响理论受植物功能性状类型和微地形的影响.

Plant function traits are individual characteristics of growth, survival and reproduction in the process of adapting to the environment, affecting the process and function of the ecosystem. Based on this, this paper studied the relationship between plant height and specific leaf area and soil hydrolytic nitrogen and soil moisture content of the dominant species in the meadow platform and slope land of Huo Mountain. The results showed that the plant height of dominant species on slope land was significantly negatively correlated with soil moisture content (R 2=0.681, P<0.01) and hydrolyzed nitrogen content (R 2=0.543, P< 0.05), and the specific leaf area and no correlation between soil moisture content and nitrogen content. The specific leaf area has no correlation with soil moisture content and hydrolyzed nitrogen content. The height and specific leaf area of the dominant species were not correlated with soil moisture content and hydrolyzed nitrogen content. The above results showed that the dominant species influence theory of biomass hypothesis and mass ratio hypothesis was influenced by the types of plant functional trait types and microtopography.