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.
Highlights
Vegetables are rich source of vitamins, proteins, carbohydrates and minerals, which constitute an important component in human nutrition
plant growth promoting rhizobacteria (PGPR) are a heterogeneous group of bacteria that can be found in the soil rhizosphere, which can improve the quality of the plant growth directly or indirectly [2] and the experiment of Lai Chi Quoc et al [3] showed that the effectiveness of the phosphate-potassium solubilizing bacterial strains on the growth of vegetables cultivated in the greenhouse and they discovered three strains having the good ability of nitrogen fixation, contributed to yield-biomass of Allium fistulosum sp. and Basella alba L
In general, mustard greens seedlings developed very well on acid sulfate soil in the first day because they were planted in compost (Figure 2)
Summary
Vegetables are rich source of vitamins, proteins, carbohydrates and minerals, which constitute an important component in human nutrition. PGPR are a heterogeneous group of bacteria that can be found in the soil rhizosphere, which can improve the quality of the plant growth directly or indirectly [2] and the experiment of Lai Chi Quoc et al [3] showed that the effectiveness of the phosphate-potassium solubilizing bacterial strains on the growth of vegetables cultivated in the greenhouse and they discovered three strains having the good ability of nitrogen fixation, contributed to yield-biomass of Allium fistulosum sp. Nguyen Thi Don and Cao Ngoc Diep [4] applied the 12 phosphate and potassium solubilizing bacterial strains into safety vegetable cultivation successfully and limitation of nitrate stimulated in the leaf-eating vegetables in order to prevent chemical pollution and clean foods production.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
