Effects of polyethylene glycol concentrations and duration on the yield of mungbean.

摘要

Poor germination and low seed viability are among the serious problems in the production of mungbean. An experiment was conducted to study the effect of Polyethylene glycol concentrations and duration on yield of mungbean cv. NM92 at NWFP Agricultural University, Peshawar during 2002. The experiment was laid out in RCB design replicated four times having six treatments (T1=100 g Polyethylene glycol kg-1 of water for 24 hrs, T2=300 g Polyethylene glycol kg-1 of water for 24 hrs, T3=100 g Polyethylene glycol kg-1 of water for 8 hrs, T4=300 g Polyethylene glycol kg-1 of water for 8 hrs, T5=Soaking with water for 8 hrs and To=control). The parameters studied were days to emergence, emergence percentage, days to flowering, days to pods formation, days to pods maturity, pods per plant, grains per pod, thousand grains weight and grain yield. Polyethylene glycol significantly affected days to emergence, emergence percentage, days to flowering, days to pod formation. Seed primed in 100 g polyethylene glycol/kg water for 8 hours showed maximum emergence percentage (46%), minimum days to emergence (16 days), days to flowering (50 days) and days to pod formation (60 days). Seed treatment non-significantly affected pods per plant, grains per pod, thousand grains weight and grain yield. Therefore, seed treatment of 100 g polyethylene glycol/kg of water for 8 hrs was found the best concentrations and treatment duration for improved germination, shorter crop duration and maximum emergence percentage. This technique can be efficiently used when we have short time to include legumes in our cropping system or in areas where we have germination, seedlings establishment and emergence problems..