System productivity, nutrient uptake and nutrient balance in the wheat-mungbean-t. Aman rice cropping system

Abstract

System productivity, nutrient uptake and apparent nutrient balance in the wheatmungbean- T. aman rice cropping system was studied. The experiment comprised four treatments-absolute nutrient control (T₁); farmer’s practice (T₂); AEZ basis fertilizer application (T₃) and soil test basis fertlizer application (T₄). The treatments were compared in a RCBD with three replications over two consecutive years, 2008-09 and 2009-10. The experiment was conducted in Chhiata clay loam soil. The average yields of wheat, mungbean and T. aman ranged from 1415 to 3096 kg ha^-1, 1020 to 1463 kg ha^-1 and 2999 to 4282 kg ha^{- 1}, respectively showing T₄ as the best treatment. The same treatment (T₄) demonstrated the highest nutrient uptake by the crops. The apparent balance of N and K (difference between nutrient uptake and nutrient addition) was negative; however it was less negative for T₄ treatment. The P balance was positive for all the treatment except T₁. Positive S balance was observed in T₃ and T₄ but negative in absolute control and farmer’s practice. Zinc and B balance was also positive in case of T₃ and T₄, but negative for T₁ and T₂ except B. The study suggests soil test basis fertlizer recommendation for the wheatmungbean- T. aman rice cropping system.

Bangladesh J. Agril. Res. 42(3): 509-520, September 2017