Efficacy of different Rhizobium Strains on Nodulation and Seed Yield in Mungbean (Vegna radiata L.) Cultivar Inqalab Mung
Efficacy of different Rhizobium Strains on Nodulation and Seed Yield in Mungbean (Vegna radiata L.) Cultivar Inqalab Mung
Rafiq-ur-Rehman1*, Zahoor Ahmad1, Wiqar Ahmad2, Muhammad Mansoor3 and Shah Masaud1
ABSTRACT
Studies on bio-fertilizers that support the biological N fixation in legume crops is economical and environmentally sound activity in crops production. Response of mungbean cultivar (Inqalab Mung) inoculated with four strains of rhizobium (TAL-634, TAL-169, NARC-BK and NARC-M) was evaluated during two consecutive years 2015 and 2016 at the Agricultural Research Institute, Rata Kulachi, Dera Ismail Khan (31º 49/ N latitude and 70º 55/ East longitude), Khyber Pakhtunkhwa, Pakistan. The current experiments were carried out in a randomized complete block design with split plot arrangements replicated four times. The effects of different Rhizobium strains were found significant on yield parameters of the crop. Inoculation with rhizobium strain NARC-BK strain showed the maximum and significantly (p<0.05) higher number of branches, pod clusters plant-1, pods plant-1 and pods cluster-1, pod length, 1000-seed weight, number of seed pod-1 (by 37, 18, 53, 31, 14, 7 and 5%, respectively). Rhizobium strains TAL-169 exceeded NARC-BK with 6% increase only in root length. Only NARC-BK could produce the 5.85 nodules after 15 days after sowing whilst strains in number of nodules were in the order; NARC-BK > TAL-634 > TAL-169 > NARC-M after 30 days (104, 40, 20 and 1% increase over the control, respectively) and 45 days (456, 118, 44 and 14% increase over the control, respectively). Nodules dry weight plant-1 (52.7 mg), seed yield (1269 kg ha-1) and harvest index (43%) were maximum with NARC-BK. Seasons had significant effect on number of branches, pod clusters, and pods plant-1,1000-seed weight, root length, nodule dry weight plant-1, seed yield and harvest index with reduction by 5, 2.4, 8, 1.6, 3, 6, 2 and 2% respectively, in 2016 as compared to 2015. Number of nodules plant-1 showed 21, 16 and 7% reduction during 2016 over the 2015 after the 15, 30 and 45 days of sowing. Interaction effect of inoculum strains and the environment was significant only on number of pod plant-1. The study concluded that NARC-BK is the best rhizobia strain for fetching maximum seed yield and its contributing parameters in mungbean crop irrespective of variable seasonal effect in Dera Ismail Khan, Khyber Pakhtunkhwa, Pakistan.
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December 2019
Vol. 35, Iss. 4, Pages 1020-1356
