Estimation of Phosphorous use efficiency of Mung Bean cultivars under different Phosphorous regimes

Abstract

Phosphorus deficiency is one of the major production limiting factors in mung bean. Development of phosphorus efficient genotypes of mung bean which perform well under phosphorus deficit conditions is key strategy to overcome this problem. A trial was conducted following factorial completely randomized design with five mung bean genotypes i.e., NM2010, AZRI, 8009, NM2011 and NM-2016, three phosphorus levels i.e., P1 5 mg /kg sand (control), P2 20mg /kg sand and P3 40 mg /kg sand and four replications in sand filled pots. Data was recorded for various morphological and physiological parameters. Significant differenceswere observed for Shoot length, root length, number of lateral roots, no. of nodules, shoot and root phosphorous contents at different phosphorus levels. Moreover, different genotypes exhibited statistically significant interaction with phosphorus levels for various parameters. Variety NM-2010 gave the highest value for shoot length and root length at minimum phosphorus application. Likewise, highest level of available phosphorus in growing media was observed for variety 8009 with minimum application of phosphorus. These observations indicate that considerable genetic variation is present in available mung bean genotypes for phosphorus use efficiency and this variation may be used to select suitable genotype for evolving phosphorus efficient cultivars.