保护地集约栽培早竹衰老和矿质元素关系的研究

通过调查未覆盖、2~3 a覆盖、4~5 a覆盖和6~7 a覆盖4类集约栽培早竹林的竹鞭和鞭芽生长状况并测定各处理土壤中矿质元素含量,研究早竹林衰老和矿质元素关系,结果表明,从4~5 a覆盖到6~7 a覆盖为早竹林衰老明显加剧的转折点,竹鞭和鞭芽生长状况可作为竹子衰老的一个指标;矿质元素对竹子衰老的影响分为3类:①与早竹衰老关系不大:N、K;②高浓度时促进早竹衰老:P、Cu、Ca、Al、Se;③低浓度时促进竹子衰老:Ni、Mg、Mn、Co、Zn。保护地集约栽培早竹衰老可能与土壤中高含量的P、Cu有关,高含量的Zn不促进早竹衰老。

Study on Relationship between Mineral Components and Aging of Phyllostachys praecox Promoted by Mulching

Investigation on rhizome,bud growth and determination on mineral components in 4 types of Phyllostachys praecox forest with no mulching,mulching of 2~3 years,4~5 years and 6~7 years are showed that N and K had no relation with aging of the forest,high concentration of P,Cu,Ca,Al,Se and lower concentration of Ni,Mg,Mn,Co and Zn promoted the ageing.Earlier aging of Ph.praecox stand promoted by mulching could be caused by higher content of P and Cu in soil,but not from high content of Zn.