Highlights Genetic gain for rice grain yield for International Rice Research Institute drought breeding program was estimated. Positive trend of 0.68 %, 0.87 %, 1.9 % under irrigated control, moderate and severe drought achieved. Superiority of new rice varieties over currently grown demonstrated on farmers’ fields. International Rice Research Institute developed rice varieties can protect farmers from crop losses under drought conditions.
Rice is a major crop in Bangladesh that supports both food security and livelihoods. However, a need remains for improved productivity and adaptation to the risks associated with climate change. To accomplish this, the increased adoption of climate-resilient and high-yielding rice varieties can be beneficial. Therefore, we conducted a study in Bangladesh over three consecutive years: 2016, 2017, and 2018. The scope of the study included the major cropping season (wet), Aman. The yield advantages of climate-resilient rice varieties were evaluated and compared with those of the varieties popular with farmers. We included new stress-tolerant varieties, such as submergence-tolerant rice (BRRI dhan51 and BRRI dhan52) and drought-tolerant rice (BRRI dhan56 and BRRI dhan71), along with farmer-chosen controls, in the study. We conducted the evaluation through on-farm trials to compare the varieties in both submergence- and drought-affected environments. The seasonal trials provided measured results of yield advantages. The participating farmers were also studied over the three-year-period to capture their varietal adoption rates. We calculated both the location estimated yield advantages (LEYA) and the location observed yield advantages (LOYA). The results revealed that, under non-stress conditions, the grain yields of climate-resilient varieties were either statistically similar to or higher than those of the farmer-chosen controls. Our study also revealed a year-to-year progressive adoption rate for the introduced varieties. The study suggests that the wide-scale introduction and popularization of climate-resilient varieties can ensure higher productivity and climate risk adaptation. The close similarity between LOYA and LEYA indicated that the observational and experiential conclusions of the host farmers were similar to the scientific performance of the varieties. We also found that comparison performed through on-farm trials was a critical method for enhancing experiential learning and obtaining an accurate estimation of yield advantages.
The study evaluated the adoption and farmers practice of raised bed technology at farm level since the close of the Soil Management Collaborative Research Support Program (SMCRSP) through a follow-up survey conducted at Durgapur Upazila of Rajshahi district. Data for the study were collected from 195 adopters and 65 non-adopters through a pre-tested interview schedule during May, 2011. The survey findings showed that the raised bed technology had a strong demonstration effect and were adopted well (56%) by the respondent farmers. The probability of adopting this technology was significantly influenced by extension contact, societal membership, and the number of male member in the household. Due to lack of machine, most farmers prepared raised bed by hand (82.7%) without maintaining recommended bed size. The most cultivated crops on bed were wheat (cultivated by 97.95% farmers) maize (27.69%) onion (16.41%) and mungbean (12.31%). Respondent farmers mentioned various positive benefits of bed technology and willing to continue this practice in future with increased area of land. This immerging technology increased cop productivity and farmers income to some extent. To popularize the raised bed technology among farmers, bed planter should be available to the farmers and the positive benefits should be broadcasted in the mass mediaBangladesh J. Agril. Res. 40(4): 551-566, December 2015
Even though rice has high importance for food security and agricultural GDP in the agrarian economy of Odisha, production is constrained by several factors. The trends, patterns, and instability of key production parameters such as area, yield need to be studied to suggest insightful measures for the development of rice cultivation in the state. The resource use efficiency also assumes significance to determine the profitability of rice production. The study used both secondary and primary data and analyzed trend, instability, and resource use efficiency using compound annual growth method (CAGR), Cuddy-Della Valle Instability Index, and Cobb-Douglas production function respectively. While the area under rice in Odisha marked a negative annual growth (-0.18), the yield and productions have shown significant positive growth of 1.95 and 1.76% respectively for the period of 1960-2019. In respect of instability in production and productivity, moderate variability was observed. However, for the area, the instability is very less. The production function analysis has shown excessive usage of significant resources like labor, fertilizers, and pesticides. The ratio of marginal value product and marginal factor cost for these inputs were much less than one, thus suggesting resource use optimization for profit maximization. The considerable variability in rice production, area and productivity in Odisha should be responded with strategic and sustainable measures.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.