Comparative performance and phosphorus utilization efficiency of mungbean cultivars grown on a Typic Ustochrept
DOI:
https://doi.org/10.53550/jfl.v20i1.2095Keywords:
Phosphorus response, P use efficiencyAbstract
In a field experiment over two years in the semi-arid region on Typic Ustochrept, phosphorus efficiency parameters of mungbean cultivars were evaluated in relation to rates of applied P (0 to 26.25 kg P/ha). The parameters evaluated were yield response, seed yield/kg of fertilizer P applied, phosphorus harvest index (PHI), P utilization from soil (PUS) and fertilizer (PUF) sources and P efficiency ratio (PES) measured as seed yield/kg P uptake by the shoot or seed yield/kg P uptake by the seed. The seed and straw yields, P uptake by the crop and P fertilizer requirement for optimum production of different cultivars were also studied. Significant differences were observed among cultivars in response to applied fertilizer P. The calculated optimum application rates of fertilizer P to achieve 90% of the maximum yield varied from 21.6 to 27.4 kg P/ha. The efficiency of production as measured by seed yield/ kg applied P was greater at lower rates of P application. PHI was found to be an insensitive parameter, as applied P did not influence it. Cultivar differences were clearly observed in PUF, PUS and PES.
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