水土保持通报2017，Vol.37Issue(4)：74-78,5.DOI:10.13961/j.cnki.stbctb.2017.04.013
杨树苗根系特性及根际土壤微生物多样性对施用味精废浆的响应
Responses of Root Characteristics and Microbial Diversity to Application of Monosodium Glutamate Wastewater in Rhizosphere Soil of Poplar Seedlings
摘要
Abstract
[Objective] Exploring the effects of monosodium glutamate wastewater on root characteristics and microbial diversity in rhizosphere soil of poplar,to provide theoretical basis and technical guidance for the breeding and forestation of poplar seedlings,and the popularization and application of monosodium glutamate wastewater as well.[Methods] A pot experiment including four treatments,i.e.,CK (neither urea nor monosodium glutamate wastewater was applied),CF(100％ of nitrogen was provided by urea),CM(100％ of nitrogen was provided by monosodium glutamate wastewater) and CM+-CF(50％ and 50％ of nitrogen were provided by monosodium glutamate wastewater and urea,respectively),was performed.The present study was conducted to determine the effects of different treatments on root construction level,root absorption area,microbial diversity index in rhizosphere soil,and the growths of ground diameter and height of poplar seedlings.[Results] The application of monosodium glutamate wastewater significantly promoted the root growth and construction of poplar seedlings,especially the promotions of the fine root weight and the ratio of fine root were obvious.In contrast to CF treatment,the CM+CF treatment significantly increased the total absorption area and active absorption area of roots,and the increments were 76.39％ and 121.48％,respectively.At the same time,the maximum value of microbial diversity index was observed by the use of CM+ CF,which had significant differences with other treatments.Additionally,this treatment also obviously improved the growths of ground diameter and height of poplar seedlings,indicative of 45.30％,22.62％ and 10.78％ increases in ground diameter and 42.21％,20.65％ and 11.46％ increases in height over the treatments of CK,CF and CM,respectively.[Conclusion] As a result,monosodium glutamate wastewater combined with inorganic fertilizer was beneficial to improve root characteristics and microbial diversity index in rhizosphere soil,and to promote growth of poplar seedlings.关键词
欧美Ⅰ-107杨/味精废浆/根系构建/根系吸收面积/微生物多样性Key words
populus × euramericana/monosodium glutamate wastewater/root construction/root absorption area/microbial diversity分类
农业科技引用本文复制引用
陈苗苗,井大炜,付修勇,刘富刚,袁晓兰,昝林生,贾海慧..杨树苗根系特性及根际土壤微生物多样性对施用味精废浆的响应[J].水土保持通报,2017,37(4):74-78,5.基金项目
国家自然科学基金项目“断根对杨树切口处不同根序细根的形态特征、解剖结构及生理代谢的调控机理研究”(31500513) （31500513）
德州学院科技人才引进项目(311890) （311890）
