磷资源有效性对四川大头茶幼苗构件生长的影响

INFLUENCE OF RESOUCE AVAILABILITY OF PHOSPHORUS ON THE GROWTH OF MODULE OF GODINIA ACUMINATA SEEDLINGS

通过人工控制４种磷肥浓度０ｇ／ｋｇ（Ｐ０），１ｇ／ｋｇ（Ｐ１），２ｇ／ｋｇ（Ｐ２）、４ｇ／ｋｇ（Ｐ３），研究探讨磷资源有效性对５年生四川大头茶功苗构件生长的效应，结果表明：不同磷肥浓度强烈影响了四川大头茶幼苗茎高、叶数、叶面积和叶大小生长动态；随着磷肥浓度的增加，叶片现存数，叶面积显著增加，地上生物量和根系生物量也逐渐增加，并以叶，中根和细根的生物量增加程度最为突出；主分量分析反映了Ｐ３与Ｐ０的四川大头茶幼苗生长之间存在巨大差异，并反映了构件特征之间具有极大的相关性。

Based on a gradient experiment designed in four different densities of phosphrus,we studied and investigated inflence of resouce availability of phosphrus on the growth of module population of 5 old-year Gordonia acuminata seedlings.The results show that the growth dynamics of its module population,in terms of stem height,number of leaves,leaf area and leaf size,are inflenced by different densities of phosphrus.With increase in phosphrus density,its current number of leaves and leaf size increase approprately,and so its above ground and total root biomass. In addition,the increase in biomass of leaf ,middle and fine root is most obvious.Principul component analysis reveals quite difference between the growth of P3 and P0 seedings,and finds large correlation among module characters of seedings.