摘要
在野外实验样地中选取了薇甘菊入侵程度不同的4个样地,测定了土壤理化因子、土壤微生物生物量(C、N、P)以及土壤基础呼吸和基质诱导呼吸等指标的变化.结果表明,薇甘菊入侵后土壤微生物生物量(C、N、P)显著增加,土壤呼吸加快,土壤代谢熵(qCO2)下降,改善了入侵地土壤的养分供应状况,这可能是薇甘菊入侵成功的一个重要原因.
In the field experiment study, 4 sampling plots were selected： the native community （NATV） , the invading Mikania micrantha monoculture （EXOT）, and the two ecotones （ NA - ECOT and EX - ECOT） between NATV and EXOT for comparing the differences in soil physico - chemical properties, microbial biomass, soil basal respiration and substrated - induced respiration, etc. The results showed that： （ 1 ） the microbial biomass increased with M. micrantha invasion ; （2） soil basal respiration and substrated - induced respiration quickened but the soil metabolic quotient （qCO2 ） decreased. These facts implied that the invasion of M. micrantha enhanced the soil nutrient bioavailability, which was conducive to their growth and may be an important factor for its further development.
出处
《华南师范大学学报（自然科学版）》
CAS
2008年第3期95-102,共8页
Journal of South China Normal University(Natural Science Edition)
关键词
薇甘菊
土壤微生物生物量
土壤呼吸
土壤代谢熵
Mikania micrantha
soil microbial biomass
soil respiration
soil metabolic quotient （ qCO2 ）
