衡阳紫色土山丘区灌草地土地利用方式土壤种子库特征

Soil Seed Bank Properties of Frutex and Grassland Land Use Type on Mountain and Hill Areas with Purple Soils in Hengyang of Hunan Province,China

通过野外调查取样和室内试验相结合的方法,于2017年和2018年对衡阳紫色土山丘区不同坡向、坡位灌草地土地利用方式0~10 cm土层土壤种子库组成、密度及多样性特征进行调查分析。结果表明:衡阳紫色土山丘区灌草地土地利用方式土壤种子库密度为(2367±217~6867±410)粒·m^(-2),阴坡土壤种子库密度显著高于阳坡(P<0.05),下坡显著高于上坡(P<0.05);坡向、坡位均显著影响土壤种子库的Margalef丰富度指数(R)、Shannon-Wiener多样性指数(H)(P<0.05),但对Peilow均匀度指数(E)无显著影响(P>0.05),2017和2018年土壤种子库密度不存在显著差异(P>0.05)。研究结果对衡阳紫色土山丘区灌草地土地利用方式的可持续利用和恢复提供参考依据。

By combining field survey sampling with lab experiments,we investigated and analyzed species composition,density and diversity properties in 0-10 cm soil layers on different slope and position of frutex and grassland land use type on mountain and hill areas with purple soils in Hengyang of Hunan Province,China in the year of 2017 and 2018.The results showed that the density of the soil seed bank was ranged from(2367±217)seeds·m^(-2) to(6867±410)seeds·m^(-2),and the shady slope was significantly higher the sun slope(P<0.05),and the downslope position was significantly higher the upslope(P<0.05);The slope direction and slope position significantly affected Margalef richness index(R)and Shannon-Wiener diversity(H)of soil seed bank(P<0.05),however there was no significantly effect to Peilow evenness index(E)(P>0.05),there was no significant effect on the soil seed bank in the year of 2017 and 2018(P>0.05).The study can provide a reference for the sustainable use and restoration of frutex and grassland land use type on mountain and hill areas with purple soils in Hengyang of Hunan Province,China.