Abstract
Phosphorus is a key Nutrient for plant growth and development. Phosphorus is taken up from the soil solution by plant roots as orthophosphate ions, principally as monovalent orthophosphate, H2PO4 − ions. This study was conducted to explore the role of different phosphorus (P) levels and P uptake and use efficiency on acidic soils. The soil was collected from the acidic region of Bangladesh in which initial soil pH was 5.2 in water. KH2PO4 was used as the sources of phosphorus for the different level of P application. Two recently BARI developed wheat varieties like BARI GOM 25 and BARI GOM 26 was used a testing plant with three replications. Result showed the growth parameter, plant biomass increased about 91 % (maximum at 120 mg P/kg) with respect to the controlled treatment. Likewise, P uptake by wheat seedlings increases about 90 % (maximum at 120 mg P/kg) with respect to controlled treatment. However, no significant differences were observed between wheat varieties irrespective to growth and P uptake by wheat seedlings. This study reveals that the elevated P taken a significant part in the development of the wheat plant in acidic soil. These findings indicate that the added soluble P increases the absorption of nutrients from the soil solution. However, application of elevated P is efficient both for increasing shoot development and root growth and the phosphorus use efficiency with respect to plant utilization.
Highlights
Phosphorus (P) is an essential macro nutrient
This study aims with the following objectives: to understand how elevated P behaves in an acidic soil, to determine P uptake by recently BARI released wheat varieties under acidic condition, evaluate growth response of recently BARI released wheat varieties under elevated P applied condition
The results showed for the variety BARI GOM 25 that the maximum plant height (34.7 cm) was recorded in treatment T5 (120 mg P/kg), while it was minimum (25.49 cm) in treatment T1
Summary
It is vital to plant growth and is found in every living plant cell It is involved in several key plant functions including energy transfer, photosynthesis, transformation of sugars and starches, nutrient movement within the plant and transfer of genetic characteristics from generation after generation (Pasek 2008). The concentrations of inorganic P in soil solution are, typically very low, due to inorganic P’s propensity to bind strongly to soil surfaces or form insoluble complexes with cations (Talboys et al 2014). This means that inorganic P is often a limiting factor in plant growth and development. The same factors can affect the recovery of P reserves accumulated in the soil from the past additions of P as fertilizer or manure
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