Contribution of selected plant growth promoting rhizobacteria to maize phosphorus nutrition as influenced by organic matter management

有机质管理影响下选定的植物促生根际细菌对玉米磷营养的贡献

• 批准号: 34406390
• 负责人: Professorin Dr. Bettina Eichler-Löbermann
• 金额: --
• 依托单位: Lehrstuhl Pflanzenbau (AP)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/34406390?language=en
• 关键词: Contribution; selected; plant; growth; promoting

A sustainable management of the soil organic matter is one of the most important factors for increasing the productivity in crop husbandry. Organic fertilization influences chemical, physical and biological soil properties, as well as the role of microorganisms (MOs) in the soil nutrient cycles. The overall objective of this study is to investigate qualitatively and quantitatively the effect of PGPR to maize P nutrition as influenced by organic fertilization. For this aim it is planned to apply the PGPR strains of Enterobacter radicincitans and Pseudomanas fluorescens to a field experiment with different long-term organic fertilizer treatments (without, cattle manure and biowaste compost). Differences in soil P fractions, enzyme activities relevant for soil P cycle, and plant P uptake will be monitored as well as the interactions of PGPR and arbuscular mycorrhizal (AM) colonisation of maize roots. Furthermore, the contribution of PGPR to the plant available P from the organic source myo-inositol hexaphosphate without any application of additional organic C and N will be investigated. General conclusions for the successful application of PGPR should be derived from the results as a significant support for an efficient P use in crop husbandry.

土壤有机质的可持续管理是提高种植业生产力的重要因素之一。有机肥影响土壤的化学、物理和生物性质，以及微生物在土壤养分循环中的作用。本研究的总体目标是定性和定量研究有机肥对玉米磷素营养的影响。为此，计划将根癌肠杆菌和荧光假单胞菌的PGPR菌株应用于不同长期有机肥处理(不施牛粪和生物垃圾堆肥)的田间试验。将监测土壤磷组分、与土壤磷循环相关的酶活性和植物磷吸收的差异，以及PGPR和丛枝菌根(AM)在玉米根部定植的相互作用。此外，还将研究在不施加任何额外有机C和N的情况下，PGPR对有机来源肌醇六磷酸盐对植物有效磷的贡献。从这些结果中可以得出成功应用PGPR的一般性结论，从而为有效利用磷在畜牧业中提供重要的支持。