Effects of Fertilization on Stoichiometry Characteristics of Treesoilmicroorganism for Dalbergia odorifera Seedlings
《北方园艺》[ISSN:1001-0009/CN:23-1247/S]
- Issue:
- 2018年22
- Page:
- 129-134
- Research Field:
- Publishing date:
Info
- Title:
- Effects of Fertilization on Stoichiometry Characteristics of Treesoilmicroorganism for Dalbergia odorifera Seedlings
- Author(s):
- WANG Nan; WANG Hongxin
- (College of Art,Sanya University,Sanya,Hainan 572022)
- Keywords:
- Dalbergia odorifera; fertilization; stoichiometry; soil microbes
- PACS:
- -
- DOI:
- 10.11937/bfyy.20181278
- Abstract:
- The research of fertilization on stoichiometry characteristics of treesoilmicroorganism is critical for understanding the regulation mechanism of nutrient elements to tree and microbe growth.A potted experiment with 2yearold seedlings was conducted to study the carbon,nitrogen stoichiometry characteristics and the relationships for Dalbergia odorifera under different N,P,K application at four levels with orthogonal design.In order to provide scientific basis for artificial cultivation of Dalbergia odorifera.The results showed that,1)the soil organic carbon content did not differ significantly among fertility treatments,while the total soilnitrogen content(N.soil),soil carbon to nitrogen ratio (C/N.soil),microbial biomass carbon and nitrogen contents(C.m,N.m) and microbial biomass carbon to nitrogen ratio (C/N.m) had significant differences among fertility treatments(P<0.05);with the increase of fertility level,the N.soil,C.m and N.m showed an obvious increasing trend,however,both C/N.soil and C/N.m showed a tendency to decrease;2)there was no significant difference in the carbon contents for tree vegetative organs (stem,branch,leaf and fine root) of Dalbergia odorifera,while the total nitrogen and carbon to nitrogen ratio all differed significantly among fertility treatments for stem,branch,leaf and fine root(P<0.01),which had the difference trend with the increase of fertility level;3)C/N.soil was significantly positively correlated with C/N in microbial biomass and stem,branch,leaf,fine root of Dalbergia odorifera(P<0.01).Our study suggested that the stoichiometry characteristics of treesoilmicroorganism might adapt to changes in soil fertility,while the degree and trend of the change were different among tree,soil and microorganism.
Last Update: 2018-12-03