CAJ | 학술논문

选取南昌市"农村-郊区-城市" 3块人工湿地松林典型样地作为研究对象,测定其土壤养分含量,分析了森林土壤微生物数量年均值和季节性变化.结果表明:土壤容重、全P、pH值表现为增加的趋势,有机C、全N呈下降的趋势;在不同的生态界面年均值都表现为放线菌数量>细菌数量>真菌数量,微生物总数为城市>郊区>农村,细菌与真菌数量为城市>郊区>农村,放线菌数量为郊区>城市>农村;生态界面、季节与微生物放线菌和真菌显著性均达到极显著水平(P<0.001),在不同生态界面土壤中细菌具有显著作用,但季节对细菌无显著影响;生态界面和季节对放线菌、真菌具有极明显的交互作用(P<0.001),而对细菌无显著交互作用(P>0.05);生态界面与放线菌、真菌呈极显著正相关关系(P<0.001),但季节与微生物无显著相关.总体看来,城市化进程既引起了森林土壤理化特性的变化,又使土壤微生物数量受到明显的影响.
선취남창시"농촌-교구-성시" 3괴인공습지송림전형양지작위연구대상,측정기토양양분함량,분석료삼림토양미생물수량년균치화계절성변화.결과표명:토양용중、전P、pH치표현위증가적추세,유궤C、전N정하강적추세;재불동적생태계면년균치도표현위방선균수량>세균수량>진균수량,미생물총수위성시>교구>농촌,세균여진균수량위성시>교구>농촌,방선균수량위교구>성시>농촌;생태계면、계절여미생물방선균화진균현저성균체도겁현저수평(P<0.001),재불동생태계면토양중세균구유현저작용,단계절대세균무현저영향;생태계면화계절대방선균、진균구유겁명현적교호작용(P<0.001),이대세균무현저교호작용(P>0.05);생태계면여방선균、진균정겁현저정상관관계(P<0.001),단계절여미생물무현저상관.총체간래,성시화진정기인기료삼림토양이화특성적변화,우사토양미생물수량수도명현적영향.
Three typical rural-suburban-urban artificial wetlands Pinus elliottii forest in Nanchang City were selected as research objects to mensurate the soil nutrient content. And the annual average values and seasonal changes of microbes in forest soil were analyzed. The results showed that soil bulk density, total phosphorus (TP) and pH increased, while soil organic carbon (SOC), total nitrogen (TN) declined with rural-to-urban gradient. At different eco-boundary, annual average values showed that actinomycetes quantity > bacteria quantity > fungi quantity. Total microbe number was urban >suburbs> rural areas. The number of bacteria and fungi was urban > suburbs > rural areas, but the number of actinomycetes was suburb >urban> rural areas. Eco-boundary, season and microbes actinomycetes and fungi reached an extreme significant level (P<0.001). Bacteria in soil at different eco-boundary had significant effects, but season had no significant effect on bacteria. Eco-boundary and season had a very significant interaction on actinomycetes and fungi (P<0.001), but they had no significant interaction on bacteria (P>0.05). Eco-boundary showed significantly positive correlation with actinomycetes and fungi (P<0.001), but season had no significant corelation with microbes. In conclusion, urbanization process caused the physical-chemical properties changes of forest soil and affected the amount of soil microbes obviously.