Person: Ali, M.Y.
Loading...
Email Address
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
Ali
First Name
M.Y.
Name
Ali, M.Y.
ORCID ID
0000-0001-5747-3843 3 results
Search Results
Now showing 1 - 3 of 3
- Agronomic, economic, and environmental performance of nitrogen rates and source in Bangladesh's coastal rice agroecosystems(Elsevier, 2019) Shah-Al Emran; Krupnik, T.J.; Kumar, V.; Ali, M.Y.; Pittelkow, C.M.Farmers in low-elevation coastal zones in South Asia face numerous food security and environmental sustainability challenges. This study evaluated the effects of nitrogen (N) rate and source on the agronomic, economic, and environmental performance of transplanted and rainfed ‘aman’ (monsoon-season) rice in Bangladesh’s nonsaline coastal areas. Fifty-one farmers participated in trials distributed across two landscape positions described as ‘highlands’ (on which field water inundation depth typically remains <30 cm) and ‘medium-highlands’ (inundation depths 30–90 cm) planted singly with varieties appropriate to each position (BRRI dhan 39 for highlands and the traditional variety Bhushiara for medium-highlands). Researcher designed but farmer-managed dispersed plots were located across three district sub-units (Barisal Sadar, Hizla, Mehendigonj) and compared N source (broadcast prilled urea or deep-placed urea super granules (USG)) at four N rates. Rice grown on mediumhighlands did not respond to increasing N rates beyond 28 kg N ha−1, indicating that little fertilization is required to maintain yields and profitability while limiting environmental externalities. In highland locations, clear trade-offs between agronomic and environmental goals were observed. To increase yields and profits for BRRI dhan 39, 50 or 75 kg N ha−1 was often needed, although these rates were associated with declining energy and increasing greenhouse gas (GHG) efficiencies. Compared to prilled urea, USG had no impact on yield, economic, energy and GHG efficiencies in medium-highland locations. USG conversely led to 4.2–5.8% yield improvements at higher N rates on highlands, while also increasing energy efficiency. Given the observed yield, agronomic and economic benefit of USG, our preliminary results that farmers can consider use of USG at 50 kg N ha−1 to produce yields equivalent to 75 kg N ha−1 of prilled urea in highland landscapes, while also reducing environmental externalities. These results suggest that when assessing sustainable intensification (SI) strategies for rice in South Asia’s coastal zones, N requirements should be evaluated within specific production contexts (e.g. cultivar type within landscape position) to identify options for increasing yields without negatively influencing environmental and economic indicators. Similar studies in other parts of coastal South Asia could help policy-makers prioritize investments in agriculture with the aim of improving rice productivity while also considering income generation and environmental outcomes.
Publication - Maize-rice cropping systems in Bangladesh: Status and research needs(David Publishing, 2009) Ali, M.Y.; Waddington, S.R.; Timsina, J.; Hodson, D.P.; Dixon, J.Maize-rice cropping systems are expanding in Bangladesh. Hybrid maize has increasing demand and value, particularly for poultry feed, while rice remains the traditional dominant starch staple food. Bangladesh maize yields (with average farm yields around 5.7 t·ha-1) are among the highest found in Asia. Cool winter (Rabi) season maize followed by T. Aman (monsoon) rice is the major cropping system; however it is now becoming diversified with many other crops including potato. Financially, hybrid maize is far more profitable than boro (irrigated) rice, wheat, or most other competing winter season Rabi crops. Although maize is relatively problem-free in Bangladesh, some constraints are intensifying with increased concern over input supply and soil-related environmental sustainability. An array of new technologies for sustainable intensive maize production systems is emerging in Bangladesh and some are being promoted and adopted. Continued sustainability of hybrid maize production in Bangladesh depends on optimization of planting time, quality seed of appropriate hybrids, balanced use of nutrient inputs along with soil fertility conservation and other management, for which further research would be high priority.
Publication - Maize-rice cropping systems in Bangladesh: status and research opportunities(CIMMYT, 2008) Ali, M.Y.; Waddington, S.R.; Hodson, D.P.; Timsina, J.; Dixon, J.Responding to demand from expanding poultry feed markets, maize area in Bangladesh rose from only a few thousand hectares in the 1980s to more than 200,000 hectares in 2007-08. This publication describes the rise of maize in Bangladesh, emerging problems or risks, technology options for rice-maize systems, and future research and development needs. It also outlines the role of CIMMYT, through its Bangladesh office, in the establishment and promotion of maize, as well as the provision of germplasm and capacity building for researchers and farmers, in collaboration with the Bangladesh Agricultural Research Institute (BARI), the Department of Agricultural Extension (DAE), and diverse non-governmental organizations.
Publication