ABSTRACT The aims of this research were to investigate the effects of microbial bio-fertilizer (BF) application on physicochemical properties of sandy-clay-loam (SCL) soil under three different soil moisture regimes in greenhouse-grown eggplant (Solanum melongena L.). Correlations between the physicochemical soil properties in a greenhouse condition were determined. The microbial bio-fertilizers included Azotobacter chroococum and Azotobacter vinelandii. Experiments were conducted in randomized plots design with three replications. Three different irrigation levels (100% (I100), 60% (I60) and 40% (I40) of field capacity-FC) were applied. Post-harvest soil samples were analyzed for soil physical and chemical characteristics. Bio-fertilizers had positive impacts on physicochemical soil properties. Bio-fertilizers accelerated mineralization of organic residues, thus improved the availability of macronutrients (N, P, K, Ca, and Mg) and micronutrients (Fe, Mn, Zn, and B). The highest total N value (0.143%) was observed in I100 treatment of bio-fertilizer (BF+I100) and the lowest total N (0.087%) was observed in I40 treatment without bio-fertilizer. Bio-fertilizers improved aggregate stability, total porosity, moisture-retention capacity and infiltration rate, and decreased bulk density of the soils. Bio-fertilizers increased water uptake and decreased drought susceptibility of the plants. It was concluded that bio-fertilizers could reliably be used to improve soil physical and chemical characteristics under different irrigation levels.

中文翻译：

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不同土壤水分条件下微生物生物肥料对温室茄子（Solanum Melongena L.）土壤理化性质的影响

摘要 本研究的目的是研究微生物生物肥料 (BF) 的施用对温室种植茄子 (Solanum melongena L.) 三种不同土壤水分状况下砂质粘土 (SCL) 土壤理化性质的影响。 . 确定了温室条件下土壤理化性质之间的相关性。微生物生物肥料包括色固氮菌和维氏固氮菌。实验以随机地块设计进行，重复三次。应用了三种不同的灌溉水平（田间容量-FC 的 100% (I100)、60% (I60) 和 40% (I40)）。分析收获后土壤样品的土壤物理和化学特性。生物肥料对土壤理化性质有积极影响。生物肥料加速了有机残留物的矿化，从而提高了常量营养素（N、P、K、Ca 和 Mg）和微量营养素（Fe、Mn、Zn 和 B）的可用性。在生物肥料（BF+I100）的I100处理中观察到最高的总N值（0.143%），在没有生物肥料的I40处理中观察到最低的总N（0.087%）。生物肥料提高了团粒稳定性、总孔隙度、保水能力和渗透率，并降低了土壤的容重。生物肥料增加了植物的水分吸收并降低了植物的干旱敏感性。得出的结论是，生物肥料可以可靠地用于改善不同灌溉水平下的土壤理化特性。锌和 B)。在生物肥料（BF+I100）的I100处理中观察到最高的总N值（0.143%），在没有生物肥料的I40处理中观察到最低的总N（0.087%）。生物肥料提高了团粒稳定性、总孔隙度、保水能力和渗透率，并降低了土壤的容重。生物肥料增加了植物的水分吸收并降低了植物的干旱敏感性。得出的结论是，生物肥料可以可靠地用于改善不同灌溉水平下的土壤理化特性。锌和 B)。在生物肥料（BF+I100）的I100处理中观察到最高的总N值（0.143%），在没有生物肥料的I40处理中观察到最低的总N（0.087%）。生物肥料提高了团粒稳定性、总孔隙度、保水能力和渗透率，并降低了土壤的容重。生物肥料增加了植物的水分吸收并降低了植物的干旱敏感性。得出的结论是，生物肥料可以可靠地用于改善不同灌溉水平下的土壤理化特性。保水能力和入渗速率，降低土壤容重。生物肥料增加了植物的水分吸收并降低了植物的干旱敏感性。得出的结论是，生物肥料可以可靠地用于改善不同灌溉水平下的土壤理化特性。保水能力和入渗速率，降低土壤容重。生物肥料增加了植物的水分吸收并降低了植物的干旱敏感性。得出的结论是，生物肥料可以可靠地用于改善不同灌溉水平下的土壤理化特性。