Performance of rainfed mungbean [Vigna radiata (L.) Wilczek]  in relation to foliar application of agrochemicals under different  sowing dates

Sahajveer Singh

Performance of rainfed mungbean [Vigna radiata (L.) Wilczek] in relation to foliar application of agrochemicals under different sowing dates

Date

2024

Authors

Sahajveer Singh

Publisher

Punjab Agricultural University

Abstract

The present study entitled “Performance of rainfed mungbean [Vigna radiata (L.) Wilczek] in relation to foliar application of agrochemicals under different sowing dates” was carried out at the Punjab Agricultural University (PAU)-Regional Research Station (RRS), Ballowal Saunkhri (SBS Nagar) during kharif 2022 to evaluate the effect of sowing time and foliar spray of agrochemicals on growth, yield and quality of mungbean under rainfed conditions. The experiment was evaluated in split plot design with three replications having two mungbean sowing dates (timely sowing and late sowing) were taken in main-plot and seven treatments of foliar spray of agrochemicals [control, KNO3 @ 1%, KNO3 @ 1.5%, thiourea @ 500 ppm, thiourea @ 750 ppm, N:P:K (20:20:20) @ 1% and N:P:K (20:20:20) @ 1.5%] at flowering and pod formation stages were taken as sub-plot treatment. The soil of the experimental site was sandy loam in texture andavailable N, P and K status was low, high and medium, respectively. Compared to timely sowing, late sowing resulted in fewer days needed to reach the flowering stage, pod formation stage and maturity. Timely sown crop resulted in higher growth parameters (plant height, DMA, LAI, chlorophyll index and PAR interception), symbiotic parameters (number of nodules plant-1 and dry weight of nodules plant-1), number of pods plant-1and nutrient uptake by both seed and stover as compared to late sowing which resulted in increase of 18.3, 16.4 and 16.7% in seed, stover and biological yield, respectively, with timely sowing, when compared with late sowing. Among biochemical parameters, proline content and total phenols were high in late sowing and ascorbic acid content was high in timely sowing. Economic analysis showed that gross returns, net returns and BC ratio were more in timely sown crop. Foliar spray of KNO3 @ 1.5% resulted in the higher plant height, DMA, LAI, PAR interception, symbiotic parameters (number of nodules plant-1 and dry weight of nodules plant-1), number of pods plant-1, relative leaf water content, but it was statistically at par with foliar spray of N:P:K (20:20:20) @ 1.5%, KNO3 @ 1% and N:P:K (20:20:20) @ 1%. Spray of N:P:K (20:20:20) @ 1.5% resulted in higher chlorophyll index but it was statistically at par with foliar sprays of KNO3 @ 1.5%, N:P:K (20:20:20) @ 1%, KNO3 @ 1% and thiourea @ 750 ppm. The foliar spray of KNO3 @ 1.5% registered significantly more number of pods plant-1 and yield (seed, stover and biological yield) but it was statistically at par with foliar spraying of N:P:K (20:20:20) @ 1.5%. There was increase of 27.7, 20.8 and 22.4% with foliar spray of KNO3 @ 1.5% and increase of 22.6, 16.8 and 18.1% with foliar spraying of N:P:K (20:20:20) @ 1.5% in seed, stover and biological yield, respectively, when compared with control.Protein content in the seed and N and P content in both seed and stover were highest with foliar spray of N:P:K (20:20:20) @ 1.5%, while the highest K content in seed and stover was recorded with foliar spray of KNO3 @ 1.5%. Proline content, ascorbic acid content and total phenols were also increased with foliar spray of KNO3 @ 1.5%. Economic analysis showed that gross returns, net returns and BC ratio were highest under foliar spray of KNO3 @ 1.5%.

Citation

Sahajveer Singh (2024). Performance of rainfed mungbean [Vigna radiata (L.) Wilczek] in relation to foliar application of agrochemicals under different sowing dates (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.