浙江农林大学学报2024，Vol.41Issue(5)：978-985,8.DOI:10.11833/j.issn.2095-0756.20240128
不同恢复年限刺槐林林下草本层的物种多样性
Diversity characteristics of herbaceous species under Robinia pseudoacacia forest in different years
摘要
Abstract
[Objective]This study,with an investigation into the species composition and diversity index of herbaceous layer under Robinia pseudoacacia forests in the hilly gully region of the Loess Plateau,is aimed to explore the characteristics and main influencing factors of its diversity index,in order to provide reference for the practice of regional vegetation restoration.[Method]With the R.pseudoacacia forests in different years(7,12,22 and 45 years)in Zichang City selected as study subjects,the species composition of the herbaceous layer in the understorey of R.pseudoacacia forests of different years were investigated employing the"space instead of time"method and the plot survey method before an analysis was conducted of the main factors influencing the diversity index using redundancy analysis(RDA).[Result](1)There were 55 species of herbaceous species in R.pseudoacacia forests of different years,belonging to 18 families,and their dominant species were mainly Asteraceae,Gramineae and Leguminosae,with the overall performance showing that the dominant species belong to a few families,while the subordinate species belong to most families;the Artemisia vulgaris,A.caruifolia and A.gmehinii have higher importance values;(2)The aboveground biomass of understory herbaceous in R.pseudoacacia forests increased with years,and planting years increased significantly the aboveground productivity of the herbaceous layer(P＜0.05).(3)Ammonium nitrogen,soil organic carbon,soil moisture and total phosphorus were the main factors influencing the Margalef and Simpson index of species diversity as well as aboveground biomass of the understory herbaceous layer whereas total nitrogen,total phosphorus,ammonium nitrogen,and soil silt were the main factors affecting Shannon-Wiener and Pielou index.[Conclusion]The herbaceous layer of R.pseudoacacia forests in the study area showed different species diversity at different years.Artemisia plants showed great adaptive ability at different years,and species diversity indicators and biomass are significantly affected by soil moisture and nutrients.Therefore,it is important to focus on the balance of soil moisture and nutrients in future afforestation practices in the Loess Plateau region to enhance the stability and sustainability of plantation ecosystem development.[Ch,2 fig.2 tab.31 ref.]关键词
不同恢复年限/林下草本层/物种多样性/地上生物量/影响因素Key words
different years/understory herbaceous layer/species diversity/aboveground biomass/influencing factors分类
农业科技引用本文复制引用
南国卫,王静慧,秦淑莹,韩磊,何馨雨..不同恢复年限刺槐林林下草本层的物种多样性[J].浙江农林大学学报,2024,41(5):978-985,8.基金项目
国家自然科学基金青年基金资助项目(42201130) （42201130）
延安大学博士科研启动项目(YDBK2019-57) （YDBK2019-57）
陕西省大学生创新创业训练项目(S202310719092) （S202310719092）
