Effects of phosphorus fertilizers and phosphorus-solubilizing rhizosphere bacteria on soil fertility, phosphorus uptake, growth, and yield of sesame (Sesamum indicum L.) cultivated on alluvial soil in dike
L. Thuc, Lê Thị Mỹ Thu, T. Hữu, Ph. H. Nghi, L. T. Quang, D. T. Xuan, L. Xuan, N. Khuong
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引用次数: 0
Abstract
Abstract The low phosphorus use efficiency (PUE) and the high P fertilizer cost are reasons why it is necessary to find sustainable phosphorus (P) sources for sesame, in which bacteria are potential candidates. The aim of this study was to determine a level of the applied P fertilizer and P-solubilizing rhizosphere bacteria (PSRB) for the maximum growth and yield of sesame. A two-factor experiment was conducted in a completely randomized block design. The first factor (i) was the P fertilizer rate, including 0%, 50%, 75%, and 100% P of the recommended fertilizer rate (RFR); the other was (ii) the supplementation of the PSRB, including no supplemented bacteria, a single strain of Enterobacter asburiae ASD-56, ASD-15, or ASD-43, and the mixture of all the three strains, with five replications. The results revealed that fertilizing with 100% P of the RFR enhanced means of the plant height (5.4 cm), the number of capsules (4.4 capsules plant−1), the total P uptake (34.3 mg P pot−1), and the sesame seed yield (16.4 g pot−1) in comparison with the case with no P fertilizer. The supplementation of the E. asburiae ASD-56, ASD-15, and ASD-43 improved values of the soluble P in soil, the total P uptake in plants, and the seed yield at 82.6 mg P kg−1, 73.1 mg P pot−1, and 15.2 g pot−1, respectively, compared with 72.2 mg P kg−1, 45.5 mg P pot−1, and 10.6 g pot−1 in treatment with no supplemented bacteria. Individually or aggregately applying the three E. asburiae ASD-56, ASD-15, and ASD-43 strains not only reduced the average amount of the P fertilizer used by 25–50% P of the RFR but also increased the P uptake in plants by 8.50–36.9% and the average sesame seed yield by 2.94–58.7%, in comparison with those in the treatment fertilized with 100% P of the RFR. The mixture of the PSRB contributed to reducing 50% of the RFR, and increasing the yield by 43.4%.
期刊介绍:
Geomicrobiology Journal is a unified vehicle for research and review articles in geomicrobiology and microbial biogeochemistry. One or two special issues devoted to specific geomicrobiological topics are published each year. General articles deal with microbial transformations of geologically important minerals and elements, including those that occur in marine and freshwater environments, soils, mineral deposits and rock formations, and the environmental biogeochemical impact of these transformations. In this context, the functions of Bacteria and Archaea, yeasts, filamentous fungi, micro-algae, protists, and their viruses as geochemical agents are examined.
Articles may stress the nature of specific geologically important microorganisms and their activities, or the environmental and geological consequences of geomicrobiological activity.
The Journal covers an array of topics such as:
microbial weathering;
microbial roles in the formation and degradation of specific minerals;
mineralization of organic matter;
petroleum microbiology;
subsurface microbiology;
biofilm form and function, and other interfacial phenomena of geological importance;
biogeochemical cycling of elements;
isotopic fractionation;
paleomicrobiology.
Applied topics such as bioleaching microbiology, geomicrobiological prospecting, and groundwater pollution microbiology are addressed. New methods and techniques applied in geomicrobiological studies are also considered.