Influence of two phosphate-potassium solubilizing bacterial species on biomass and nitrate concentration on mustard greens (Brassica juncea (L.) Czernjaew) cultivated on acid sulfate soils
1 Department of Agricultural Technology, College of Rural Development, Can Tho University, Vietnam
2 Biotechnology Microbiology Department, Biotechnology R&D Institute, Can Tho University, Vietnam
Research Article
GSC Biological and Pharmaceutical Sciences, 2021, 16(03), 155–163.
Article DOI: 10.30574/gscbps.2021.16.3.0278
Publication history:
Received on 17 August 2021; revised on 19 September 2021; accepted on 21 September 2021
Abstract:
Two field trials were conducted to determine the effect of P-K solubilizing bacteria and nitrogen chemical fertilizer on growth, yield and nitrate in leaf of mustard greens Brassica juncea L.) cultivated on acid sulfate soils. Eight P-K solubilizing bacterial strains composed of 3 strains of Acinetobacter calcoaceticus and 5 strains of Rhizobium sp., bacterial liquid were directly watered into plant at 3 stages [6, 12 and 21 days after planting] during vegetable cultivation, chemical fertilizer (60N – 40 P2O5 – 20 K2O) and control (no-inoculation). The study revealed that eight P-K solubilizing bacterial strains have good characteristics as nitrogen fixation, phosphate and potassium solubilisation. Application of nitrogen chemical concentration, increasing nitrate concentration of leaf of mustard greens. Application of bacterial liquid with Acinetobacter calcoaceticus strain NT4 and Acinetobacter calcoaceticus strain NT30 strain, Rhizobium tropici strain N18 and Rhizobium leguminosarum strain K35 on mustard greens cultivated on acid sulfate soils (basal fertilizer: 40 P2O5 – 20 K2O) was the best cultural practice because the this model not only supported the highest biomass, but also decreased nitrate concentration in leaf of mustard greens.
Keywords:
Acid sulfate soil; Biomass yield; Brassica juncea; Nitrogen chemical fertilizer; Nitrate in leaf; P-K solubilizing bacteria
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