Md Mustafizur Rahman, Mohammad Monirul Hasan Tipu*, Raunak Jahan, Jubaidur Rahman, Razia Sultana, Md Rafiqul Islam
Abstract. The study was aimed to examine whether a strip-tillage system with residue retention can minimize nitrogen requirements for wheat and mungbean crops. There were two tillage systems – conventional tillage and strip tillage, two residue levels- 20% and 40% retention of the previous crop residues and five N rates – 60% of recommended fertilizer dose (RFD), 80% RFD, 100% RFD, 120% RFD and 140% RFD. For wheat, the 40% residue retention produced 2.37 t ha-1 grain yield and the 20% residue retention demonstrated 2.05 t ha-1. The highest grain yield being observed at 120% N application and the lowest yield at 60% N addition. For mungbean, the grain yield obtained for conventional tillage was 0.80 t ha-1 and for strip-tillage was 0.94 t ha-1. Residue retention i.e. 40% residue retention showed higher yield (0.90 t ha-1) compared to 20% residue retention (0.84 t ha-1). The highest seed yield being observed at 140% N application and the lowest yield at 60% N addition. The interaction effect of residue retention and nitrogen on the seed yield was not significant. For wheat, the highest rate of N application (140 kg N ha-1) under conventional tillage had the highest seed N concentration (2.08%). For mungbean, the grain N concentration only varied between two tillage systems and for two interactions such as tillage with different N rates and residue retention with different N rates. The contribution of strip tillage and higher residue retention immobilized N and increased the fertilizer N requirement.
Keywords: Mungbean, Nitrogen, Residue retention, Tillage, Wheat
Cite in Nipponpub Style:
Rahman, M.M., Tipu, M.M.H., Jahan, R., Rahman, J., Sultana, R., Islam, M.R. (2021). Requirement of nitrogen for wheat-mungbean cropping sequence under strip tillage system at two residue retention levels. Nipp. J. Environ. Sci., 2(1), 002. https://doi.org/10.46266/2021.njes.0012