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International Journal of Agricultural Research
  Year: 2006 | Volume: 1 | Issue: 1 | Page No.: 41-52
DOI: 10.3923/ijar.2006.41.52
 
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Effect of Fertilizer and Mungbean Residue Management on Total Productivity, Soil Fertility and N-use Efficiency of Intensified Rice-wheat Systems
J. Timsina , M.A. Quayyum , D.J. Connor , M. Saleque , F. Haq , G.M. Panaullah , M.A.H.S. Jahan and R.A. Begum

Abstract:
Rice-wheat (RW) sequences are major food production systems over approximately 13 Mha in the Indo-Gangetic plain (IGP) of south Asia. A major increase in productivity and maintaining its sustainability is required to provide food security for an expanding population. Field experiments to study intensified RW systems were conducted in Bangladesh at Joydebpur, Nashipur and Ishwordi differing in soils and climate by adding a third pre-rice crop, either mungbean or maize. Experiments started with wheat in 1995 at the former two sites and in 1999 at the third site and ended with rice in 2001 at all sites. System productivity and sustainability were evaluated under two fertilizer regimes (soil-test based and farmers` rates) and for mungbean, the effect of residue retention. Yields of all crops were often adversely affected by heavy rainfall during grain filling. Mungbean residue yields were smallest at Ishwordi (range: 1.6 to 2.4 t ha-1) with silty clay soils and a hotter climate and greatest at Nashipur (range: 2.3 to 5.1 t ha-1) with sandy loam soils and a cooler climate. Total System Productivity (TSP) across treatments ranged from 7.1 to 17.7 t ha-1, being greatest at Nashipur (8.8 to 17.7 t ha-1), smallest at Joydebpur (7.1 to 13.8 t ha-1) with clayey sols and a hotter climate, greatest following maize (9.0 to 17.7 t ha-1) and smallest with the removal of residues (7.1 to 12.2 t ha-1). TSP increased over time at Nashipur, declined at Joydebpur and remained stable at Ishwordi. The content of organic C and total N (SON) in the surface soil, measured after rice harvest in 2000, decreased at all sites, but residue retention maintained SON at Ishwordi only. Phosphorus, potassium and sulphur all increased but micronutrients decreased in sandy loam and clayey soils of Nashipur and Joydebpur. Mean agronomic efficiency of applied N ranged from 4.6 to 9.3 kg kg-1 across sites and treatments and was greatest at Nashipur and smallest at Joydebpur. Results reveal that while farmers may improve their diet with mungbean grain, the residual effect of the crop, even with residue retention, is not significant in short-run and that TSP is greater by inclusion of maize rather than mungbean in the RW system. Longer-term experiments are required to establish the potential benefits of legumes in increasing TSP, soil fertility and system-level N-use requirement and efficiency of intensified RW systems of the IGP.
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How to cite this article:

J. Timsina , M.A. Quayyum , D.J. Connor , M. Saleque , F. Haq , G.M. Panaullah , M.A.H.S. Jahan and R.A. Begum , 2006. Effect of Fertilizer and Mungbean Residue Management on Total Productivity, Soil Fertility and N-use Efficiency of Intensified Rice-wheat Systems. International Journal of Agricultural Research, 1: 41-52.

DOI: 10.3923/ijar.2006.41.52

URL: https://scialert.net/abstract/?doi=ijar.2006.41.52

 
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