抄録
A pattern based experiment was carried out from the rabi season of 1999 to the kharif-II season of 2002 at the Bangladesh Agricultural University Farm, Mymensingh, Bangladesh in the Old Brahmaputra Floodplain Soils (Agroecological Zone 9, Aeric Haplaquept) to find out the integrated use of organic and inorganic fertilizers on the yield of T. Aus and mungbean in a Wheat-T. Aus/mungbean-T. Aman cropping sequence. There were four treatments for wheat (1st crop of the pattern) in the Wheat-T. Aus/Mungbean-T. Aman rice cropping pattern experiments: T1, Control; T2, NPKSZnB for Moderate Yield Goal (MYG); T3, NPKSZnB for High Yield Goal (HYG); T4, NPKSZnB for MYG + Cowdung (CD). The nutrient rates for four treatments (T1-T4) of wheat were: N0P0K0S0Zn0B0 kg ha-1 for T1, N80P20K50S10Zn1B1 kg ha-1 for T2, N120P30K75S15Zn2B2 kg ha-1 for T3 and N80P20K50S10Zn1B1 kg ha-1 + CD for T4. In T. Aus/mungbean (second crop of the pattern), one-third of the plot of each treatment was cultivated by T. Aus rice and the remaining two-third was plotted by mungbean. The rates of N, P, K and S for T. Aus rice were 60, 12, 32 and 5 kg ha-1 for MYG, and 90, 18, 48 and 7.5 kg ha-1 for HYG, respectively. The corresponding rates of P, K and S for mungbean were 10, 13 and 5 kg ha-1 for average yield goal (AYG), respectively. The variety BR 26 for T. Aus rice and BARI Mung-2 for mungbean was planted in all three years. The results showed that grain yields (3.46 t ha-1) and straw yields (5.19 t ha-1) of T. Aus rice (mean of three years) was increased significantly by the application of fertilizers. The application of chemical fertilizers, NPKS (HYG) remarkably increased the crop yields. The highest mean mungbean seed yield of 0.56 t ha-1 (mean of three years) and stover yield of 1.99 t ha-1 were obtained from the PKS plus inoculum plus residual NPKSZnB for HYG treatment, while the lowest mean grain yields of 1.48 t ha-1 for T. Aus and 0.42 t ha-1 for mungbean were recorded in the unfertilized control plots.
