生态学杂志2025，Vol.44Issue(4)：1152-1160,9.DOI:10.13292/j.1000-4890.202504.025
热带地区农田撂荒地土壤种子库的时空特征
Spatiotemporal characteristics of soil seed bank in abandoned farmlands in tropical areas
摘要
Abstract
To explore the spatiotemporal pattern of soil seed bank and its influencing factors after farmland aban-donment in the tropics,we used seed germination experiments to examine the composition and distribution of soil seed banks in different soil layers(0-5,5-10,10-20 cm)in different abandonment years(2nd,5th,and 10th year of abandonment)in the western and eastern regions of Hainan Island.The results showed that the maximum soil seed bank density of abandoned land in the western and eastern regions of Hainan Island in the second year af-ter farmland abandonment was 49906 and 55417 seeds·m-2 respectively.There was no significant difference be-tween the two regions(P＞0.05).After five years of abandonment,soil seed bank density in the eastern region was significantly higher than that in the western region.After 10 years of abandonment,soil seed bank density in the western region was significantly higher than that in the eastern region.As the years of abandonment increase,soil seed bank density in the western part of Hainan Island decreased first and then increased,and soil seed bank densi-ty in the eastern part of Hainan Island showed a gradual decreasing trend.The richness and diversity of soil seed banks in both regions increased over years.Aboveground vegetation and soil seed banks showed non-consistency during succession,resulting in a low similarity between the two,ranging from 3％to 21％,with a downward trend over time.Years of abandonment and its interaction with region had significant effects on soil seed bank density and diversity(P＜0.05).The results provide an important reference for understanding the spatiotemporal pattern of soil seed bank and its influencing factors after farmland abandonment in tropical areas,with theoretical and practical significance for guiding farmland restoration and utilization and ecological environment protection.关键词
热带地区/土壤种子库密度/撂荒时间/多样性/相似性/丰富度Key words
tropical area/soil seed bank density/abandoned time/diversity/similarity/richness引用本文复制引用
董乾真,胡安,夏穆容,段倩雯,张瑞,李欣勇..热带地区农田撂荒地土壤种子库的时空特征[J].生态学杂志,2025,44(4):1152-1160,9.基金项目
海南省院士创新平台科研专项(YSPTX202020)资助和中国热带农业科学院基本科研业务费专项资金(1630032024015)资助. （YSPTX202020）
