广西植物2025，Vol.45Issue(11)：2021-2031,11.DOI:10.11931/guihaia.gxzw202505029
白蚁筑巢对橡胶林土壤团聚体稳定性及其养分元素的动态影响
Dynamic impacts of termite mounds on soil aggregate stability and nutrient elements in rubber plantations
摘要
Abstract
To explore the improvement function of fungus-growing termites as"ecosystem engineers"on soil quality in tropical plantations,this study compared termite mound soils(top and base positions)with adjacent environment soils from a mature rubber plantation in Xishuangbanna,Southwest China.Seasonal variations in soil aggregate stability and nutrient distribution within different aggregate sizes[megaaggregate(>2 mm),macroaggregate(0.25-2 mm),and microaggregate(<0.25 mm)]were analyzed.The results were as follows:(1)The percentage of microaggregates at mound tops increased significantly by 131.7%during dry season.During rainy season,the percentage of megaaggregates at mound tops and bases decreased significantly by 19.6%and 26.2%,respectively,while the percentage of macroaggregates increased by 27.1%and 42.6%.Compared to surrounding soils,mound soils exhibited reduced aggregate stability in both seasons to a certain extent.(2)Mound soils significantly reduced moisture,total phosphorus,and available phosphorus in each aggregate in both seasons,with average reductions of 38.2%and 19.1%,15.3%and 18.0%,and 35.6%and 36.0%at the tops and bases,respectively.The content of dissolved organic carbon was higher in dry season than in wet season,whereas ammonium nitrogen exhibited the opposite trend.(3)Mound soils generally enriched total aluminum,total iron,and total potassium in each aggregate in both seasons,with average increases of 15.8%and 14.2%,13.9%and 13.4%,and 9.7%and 9.1%at the tops and bases,respectively.Dry-season aggregates displayed significantly higher total copper,zinc,and sulfur than rainy-season counterparts.(4)As aggregate size decreased,the reduction in dissolved organic carbon content in mound soils reached as high as 72.7%,whereas the increase in available phosphorus content was as high as 124.9%.In summary,the impact of fungus-growing termites'nesting on soil aggregate stability and nutrient elements in rubber plantations is governed by mound sampling location and seasonal variation,demonstrating strong spatiotemporal heterogeneity.The results of this study can provide theoretical references for the ecological function positioning of termites in rubber plantations and the sustainable management of soil.关键词
培菌白蚁/团聚体稳定性/季节动态/速效磷/矿质元素Key words
fungus-growing termite/aggregate stability/seasonal dynamics/available phosphorus/mineral element分类
农业科技引用本文复制引用
姜川,陈远洋,曾小玲,陈殊洁,杨雅娜,林方美,金艳强,刘成刚..白蚁筑巢对橡胶林土壤团聚体稳定性及其养分元素的动态影响[J].广西植物,2025,45(11):2021-2031,11.基金项目
国家自然科学基金(32271854) （32271854）
云南省基础研究专项(202201AT070123) （202201AT070123）
中国科学院"西部青年学者"项目 （）
云南省"兴滇英才"青年人才专项(XDYC-QNRC-2022-0204). （XDYC-QNRC-2022-0204）
