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中国农学通报 ›› 2018, Vol. 34 ›› Issue (27): 55-59.doi: 10.11924/j.issn.1000-6850.casb18040092

所属专题: 资源与环境 园艺 农业生态

• 林学 园艺 园林 • 上一篇    下一篇

保水剂-尿素凝胶对核桃苗根际土壤微生态环境影响

马丙尧,刘方春,马海林,杜振宇,刘幸红   

  1. 山东省林业科学研究院,山东省林业科学研究院,山东省林业科学研究院,山东省林业科学研究院,山东省林业科学研究院
  • 收稿日期:2018-04-19 修回日期:2018-09-06 接受日期:2018-06-22 出版日期:2018-09-19 发布日期:2018-09-19
  • 通讯作者: 刘方春
  • 基金资助:
    国家自然科学基金“根际促生细菌诱导植物产生干旱耐受性的生理机制”(31570614);山东林业科技创新项目“林地土壤水肥增容抗旱促 生关键技术研究”(LYCX08- 2018- 41);山东省科技发展计划项目“干旱山地经济林雨水资源高效利用及水- 肥一体化关键技术研究” (2016GNC111007)。

Gel Made by Super Absorbent Polymers and Urea: Effect on Micro-ecological Environment in the Rhizosphere Soil of Juglans regia

  • Received:2018-04-19 Revised:2018-09-06 Accepted:2018-06-22 Online:2018-09-19 Published:2018-09-19

摘要: 为探讨保水剂与尿素的之间的最佳结合利用方式,以核桃苗为试材,通过盆栽试验研究了不施肥和保水剂(CK)、单施尿素(U)、单施保水剂(S)、保水剂-尿素混施(SUM)与保水剂-尿素凝胶(SUG)5 个处理对核桃苗的生长及其根际土壤微生态环境的影响。结果显示:较U处理而言,SUG处理的核桃苗根系分泌物中有机酸总量、氨基酸总量与总糖含量显著增加;根际土壤蔗糖酶、多酚氧化酶、脲酶与过氧化氢酶活性得到了明显的提高;同时,SUG处理亦显著提高了根际土壤微生物数量与微生物量碳、氮含量。此外,SUG处理还明显促进了核桃苗地径与株高的生长,并显著高于其他处理。与SUG处理相比,S和SUM处理对核桃苗根际土壤微生态环境的影响效果较小。综上,保水剂-尿素凝胶方式能改善核桃苗根际土壤微生态环境,增强抵御干旱胁迫能力,对其生长达到一定的促进作用。

关键词: 高通量测序技术, 高通量测序技术, 乳制品, 微生物多样性, 应用前景

Abstract: The paper aims to explore the best combination of SAP (Super Absorbent Polymers) and urea. We studied the effects of 5 treatments including CK (neither fertilizer nor SAP was applied), U (urea was applied alone), S (SAP was applied alone), SUM (SAP was mixed with urea) and SUG (gel was made of SAP and urea) on the growth of Juglans regia and the micro- ecological environment in the rhizosphere soil by a pot experiment. The results indicated that: compared with U treatment, the SUG treatment obviously increased total organic acids, total amino acids and total sugar in the root exudates; the activity of sucrose enzyme, polyphenol oxidase, urease enzyme and catalase enzyme in the rhizosphere soil was improved obviously; at the same time, the microbial populations, microbial biomass carbon and microbial biomass nitrogen were significantly higher in the SUG treatment than that in the other treatments; additionally, the SUG treatment obviously promoted the growth of ground diameter and plant height ofJuglans regia , and the ground diameter and plant height of SUG were higher than that in other treatments. However, S and SUM treatments had less effect on the micro-ecological environment in the rhizosphere soil than that in SUG treatment. In conclusion, the gel is beneficial to improve the micro-ecological environment in the rhizosphere soil, enhance the ability of drought resistance and promote the growth ofJuglans regia .