Assessing agro-climatological model of summer mungbean

抄録

The experiment was conducted at the Regional Agricultural Research station, Ishurdi during 2009 to 2015 to assess the agro-climatic effect on summer mungbean. Three mungbean cv. BARI mug 5, BARI mug 6 and BU mug 4 were sown on 15 March, 25 March and 4 April in each year. Average pods/plant (17.54-17.94) of seven years was observed higher in BARI mug 6 at 15 March and 25 March sowing. Pods/plant had significant effect (86%) on seed yield of summer mungbean. Average seed yield of seven years was shown the highest (1309 kg/ha) in BARI mug 6 at 25 March sowing. Average biomass yield (7033-7283 kg/ha) was noticed higher at 4 April sowing irrespective of varieties. The effect of biomass yield on the seed yield of mungbean was minimum (19%). Developed functional yield model was shown the following formula, Y=4645.56 + 2.42 HDDS + 6.37 Rainfall–106.91 Tem. – 16.45 TDM + 0.33 TSSH – 63.78 RH (R²=0.67). The effect of agro-climate on the seed yield of summer can be explained about 67% by this functional model. The co-efficients indicated the rate of change of yield due to change of one unit of input variables. The model can be used to predict the yield of summer mungbean or to verify the experimental results at prevailing agro-climatic condition of a particular year. By the selection of structural sowing time, 15-25 March was suitable for higher seed yield (1299-1309 kg/ha) of mungbean, however on the basis of regression model, optimum estimated sowing time would be 18-19 March for maximum yield (1287 kg/ha) of summer mungbean.