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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:

第46卷

期数:

2018年08期

页码:

140-145

栏目:

园艺与林学

出版日期:

2018-04-20

文章信息/Info

Title:

Enrichment effect of four landscape plants on rhizosphere soil nutrients

作者:

史伟;  杨群;  蒋跃军;  方秉俊

成都农业科技职业学院，四川成都 611130

Author(s):

Shi Wei; et al

关键词:

绿化植物; 根际; 非根际; 养分; 富集效应

Keywords:

-

分类号:

S158.3

DOI:

-

文献标志码:

A

摘要:

为探讨城市不同绿化植物根际和非根际土壤养分状况，采集了不同绿化植物(大叶女贞、广玉兰、木芙蓉和夹竹桃)根际和非根际土，测定根际和非根际土壤中pH值、有机碳含量、氮素含量、磷素含量、钾素含量和微生物数量(微生物总数、细菌数量、真菌数量和放线菌数量)，研究城市绿化植物根际对土壤养分的富集效应。研究结果表明：不同种植物通过根系调节pH的能力不同，植物根际和非根际土壤pH值表现出显著差异(P<0.05)。不同绿化植物根际与非根际土壤养分含量(有机碳、全氮、速效氮、速效磷、全钾、速效钾的含量以及微生物总数、细菌数量、真菌数量和放线菌数量)均表现为：大叶女贞>广玉兰>木芙蓉>夹竹桃，并且根际土壤养分含量均显著高于非根际土壤，表现出显著的富集作用；土壤全磷含量在根际与非根际土壤中差异不显著(P>0.05)，表现出显著的亏损作用。相关性分析表明：土壤有机碳和全氮对土壤养分含量影响较大，而pH与土壤养分含量基本呈显著或极显著的负相关关系，全磷对于土壤养分含量基本没有影响。通过以上研究说明不同绿化植物土壤养分含量在根际存在一定的富集，它们通过降低根际pH值可以提高根际养分含量，而放线菌数目对植物根际微小的变化响应更为灵敏，根际土壤养分良好的富集也是绿化植物赖以生长的基础。

Abstract:

-

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备注/Memo

备注/Memo:

收稿日期：2017-02-18
基金项目：四川省教育厅创新行动计划(编号：XM2-35)。
作者简介：史伟(1977—)，男，宁夏惠农人，硕士，副教授，研究方向为植物生长环境、教育教学研究。E-mail：shi_wei1111@126.com。

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更新日期/Last Update: 2018-04-20