Nutrient management for increased productivity of rice–wheat cropping system in Bangladesh
By M. M. Alam, J. Ladha, Foyjunnessa, Z. Rahman, S. R. Khan, Harun-ur-Rashid, Atiqa Khan, R. Buresh. 2006
106 citations recorded by the source corpus.
Abstract The rice ( Oryza sativa L.)–wheat ( Triticum aestivum L.) system in the Indo-Gangetic Plain often experiences low N use efficiency due to inefficient management of fertilizer N. We evaluated the leaf color chart (LCC) as a simple tool for improving fertilizer N use in rice and wheat in farmers’ fields of southwestern Bangladesh. Use of the LCC for N management consistently increased grain yields and added net returns for rice and wheat as compared to the farmers’ fertilizer practice across two rice and two wheat seasons, which each involved two to five villages and a total of 20–33 farmers. In rice, use of the LCC for N management without any other change in farmers’ fertilizer and crop management increased mean grain yield by 0.3–0.4 Mg ha −1 across villages and seasons. This yield increase corresponded to a median added net return of US$ 40 ha −1 . Combined use of the LCC with recommended P, K, S, and Zn fertilization further increased mean yield by 0.3–0.4 Mg ha −1 and median added net return by US$ 25–53 ha −1 . Wheat was strongly limited by nutrients in addition to N. Mean wheat grain yield increased by 0.8 Mg ha −1 when application of 20 kg N ha −1 at maximum tillering with use of the LCC was combined with recommended N, P, K, S, and Zn fertilizer use. This yield increase corresponded to median added net return of US$ 36–45 ha −1 . The added net return from use of the LCC with the farmers’ P, K, S, and Zn fertilization was only US$ 10–16 ha −1 . Results suggest farmers should apply a larger proportion of their annual fertilizer P use to wheat. Deficiencies in K, S, and Zn must be overcome in order for farmers to achieve the full benefits of improved N management with the LCC.
Subfields: Plant Science, Soil Science
View Paper: https://www.semanticscholar.org/paper/3a7db35e471ecb9469157d3f0fb2c111156dbd61
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Citations in the corpus
- Establishment of threshold leaf colour greenness for need-based fertilizer nitrogen management in irrigated wheat (Triticum aestivum L.) using leaf colour chart (2012, background): “In Bangladesh, Alam et al. (2006) found LCC 4.5 as the critical alue.”
- Relative performance of neem (Azadirachta indica) coated urea vis-à-vis ordinary urea applied to rice on the basis of soil test or following need based nitrogen management using leaf colour chart (2010, background): “…assess foliar N status and adjust top dressing accordingly as it is proved that the current recommendation of three split application at specified growth stages is not adequate to synchronize N supply with crop N demand (Bijay-Singh et al. 2002; Shukla et al. 2004; Alam et al. 2005, 2006).”
- Need based nitrogen management using the chlorophyll meter and leaf colour chart in rice and wheat in South Asia: a review (2010, methodology): “The need based N management consistently increased grain yields and as compared to the farmers’ fertilizer practice across two rice seasons (Alam et al. 2006).”
- On-farm evaluation of leaf color chart for need-based nitrogen management in irrigated transplanted rice in northwestern India (2007, background): “Alam et al. (2005, 2006), Bijay-Singh et al. (2002) and Shukla et al. (2004) proved that the current recommendation of three split applications at specified growth stages is not adequate to synchronize N supply with crop N demand.”
- Methodology of fertilizer recommendation based on yield response and agronomic efficiency for rice in China (2017, background): “Examples include crop growth models (Zhu et al., 2008; Das et al., 2009; Sattari et al., 2014) and site-specific nutrient management (Alam et al., 2006; Pampolino et al., 2007).”