CAJ | 학술논문

黄顶菊（Flaveria bidentis）为新入侵我国的一种恶性杂草，研究其化学计量特征可以了解入侵植物在不同环境中的生存和适应策略。通过网室盆栽控制试验，研究了土壤N、P添加对黄顶菊植株生长、N、P化学计量特征和叶绿素含量的影响。结果表明，土壤N、P添加比例相同条件下，养分水平对叶片N：P的影响显著；随着N、P添加量的增加，叶片N：P比显著下降，地上生物量较对照均显著增加，其中高N素比例对叶片N：P影响最大，当叶片N：P比>21.24时，植株生长速率较低，符合生长速率假说。土壤N和叶片N含量与黄顶菊叶片叶绿素含量成正相关，黄顶菊叶片N（P）含量和地上生物量均随着土壤N（P）含量的增加呈现先增加后下降趋势。黄顶菊叶片N：P约20.86为N限制，叶片N：P跃21.24为P限制。
황정국（Flaveria bidentis）위신입침아국적일충악성잡초，연구기화학계량특정가이료해입침식물재불동배경중적생존화괄응책략。통과망실분재공제시험，연구료토양N、P첨가대황정국식주생장、N、P화학계량특정화협록소함량적영향。결과표명，토양N、P첨가비례상동조건하，양분수평대협편N：P적영향현저；수착N、P첨가량적증가，협편N：P비현저하강，지상생물량교대조균현저증가，기중고N소비례대협편N：P영향최대，당협편N：P비>21.24시，식주생장속솔교저，부합생장속솔가설。토양N화협편N함량여황정국협편협록소함량성정상관，황정국협편N（P）함량화지상생물량균수착토양N（P）함량적증가정현선증가후하강추세。황정국협편N：P약20.86위N한제，협편N：P약21.24위P한제。
Flaveria bidentis is a worst weed newly invaded in China, studying on its stoichiometry can help us understand its strategy to in-vade and adapt in different environments. In a green house, we studied the effect of soil N, P addition on F. bidentis plant growth, N, P stoi-chiometry characteristics and leaf chlorophyll content. The results showed that the effect of different N or P level on leaf N:P was significantly different with equivalent N:P ratio used. Leaf N:P was reduced significantly with N, P addition increasing, but above ground biomass was de-creased also, this effect was mainly attributed to the amount of N used. When leaf N:P was larger than 21.24, plant growth rate became lower, which was in line with the growth rate hypothesis. Soil N and leaf N content had a positive correlation with leaf chlorophyll content of F. bidentis. Both F. bidentis leaf N(P)content and aboveground biomass were increasing firstly and falling later with soil N(P)content in-creasing. N and P were regarded as growth restrictive elements, when leaf N:P was below 20.86 and above 21.24, respectively.