Rice

Fukai, S.; Wade, Len J.

doi:10.1016/b978-0-12-819194-1.00002-5

Cited by 13 publications

(3 citation statements)

References 308 publications

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“…Uniform seedling emergence, and improved crop stand and establishment are major challenges for successful DSR cultivation 18 . DSR often fails to emerge uniformly due to uneven land preparation leading to imprecise water management in both irrigated and rainfed conditions in both uplands and lowlands, and therefore weed infestations take place heavily 91 . In particular, seeds fail to germinate due to low oxygen availability in rainfed lowlands owing again to poor water management 92 .…”

Section: Discussionmentioning

confidence: 99%

Seed priming with selenium and zinc nanoparticles modifies germination, growth, and yield of direct-seeded rice (Oryza sativa L.)

Adhikary

Biswas

Chakraborty

et al. 2022

Sci Rep

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Direct-seeded rice (DSR) seeds are often exposed to multiple environmental stresses in the field, leading to poor emergence, growth and productivity. Appropriate seed priming agents may help to overcome these challenges by ensuring uniform seed germination, and better seedling stand establishment. To examine the effectiveness of sodium selenite (Na-selenite), sodium selenate (Na-selenate), zinc oxide nanoparticles (ZnO-NPs), and their combinations as priming agents for DSR seeds, a controlled pot experiment followed by a field experiment over two consecutive years was conducted on a sandy clay loam soil (Inceptisol) in West Bengal, India. Priming with combinations of all priming agents had advantages over the hydro-priming treatment (control). All the combinations of the three priming agents resulted in the early emergence of seedlings with improved vigour. In the field experiment, all the combinations increased the plant chlorophyll, phenol and protein contents, leaf area index and duration, crop growth rate, uptake of nutrients (N, P, K, B, Zn and Si), and yield of DSR over the control. Our findings suggest that seed priming with the combination of ZnO-NPs, Na-selenite, and Na-selenate could be a viable option for the risk mitigation in DSR.

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Section: Discussionmentioning

confidence: 99%

Seed priming with selenium and zinc nanoparticles modifies germination, growth, and yield of direct-seeded rice (Oryza sativa L.)

Adhikary

Biswas

Chakraborty

et al. 2022

Sci Rep

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“…While, for comparison, there appears to be substantial progress towards perennial rice in lowland irrigated systems in China and southeast Asia, it is notable that current rice varieties and hybrids already have the capacity to produce “ratoon” crop yields that are 80% of an annual irrigated rice double-crop system with 32–42% lower energy input, production costs, and global warming potential (Yuan et al, 2019). More recent work has shown additional promise of perennial rices (Zhang et al, 2021; Fukai and Wade, 2021). But irrigated rice is produced in level, bunded fields with little erosion risk such that reduced input and labour costs are the primary motivations for ratooning of annual rice and introduction of high-yielding perennial rices in highland valleys of southern China (personal communication, Shaobing Peng and Len Wade).…”

Section: Progress Towards Perennial Grainsmentioning

confidence: 99%

Progress Towards Perennial Grains for Prairies and Plains

Cassman

Connor

2022

Outlook Agric

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Perennial grain crops have been proposed as environmentally sustainable alternatives to annual grain crop systems that currently dominate the world's major breadbaskets. Proponents emphasize the potential of perennial grains to mimic natural systems and thereby reduce soil erosion, nutrient losses, and degradation of soil quality although need for adequate grain yield is also recognized as a prerequisite for success. Here we assess progress since 2005 (16 y) towards development of perennial grain systems with sufficient productivity to be seen as competent alternatives to annual wheat on the prairies and plains of North America and Australia. Based on reports published in refereed journals, we see little evidence that yield of Intermediate Wheatgrass or perennial wheats have improved to the point they are viable alternatives. Slow progress is attributed to lack of minimum grain yield targets for economic viability, lack of designated target regions where perennial grains are most likely to be competitive against annuals, selection methods that focused on components of yield rather than yield per se (i.e. on an area basis), and relatively small R & D investment compared to resources given to genetic and agronomic improvement of major annual grain crops. Given current status, we conclude that perennial grains will require substantial R & D investment and several decades if they are to achieve sufficient yield potential and yield persistence to become more than a niche crop for upscale health food markets in wealthy countries.

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“…Therefore, in certain environments and conditions, it may be possible to extend SMT beyond the conservative “safe” limit. However, water and heat stress during the reproductive period often result in yield decline; 5 , 24 therefore, the research presented here focuses on the vegetative period.…”

Section: Introductionmentioning

confidence: 99%

Remote sensing to predict soil moisture tension in water saving rice systems of temperate South-Eastern Australia

Champness,

Ballester Lurbe,

Maia

et al. 2023

J. Appl. Rem. Sens.

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Non-ponded aerobic rice offers the opportunity for substantial global savings of irrigated water. Site and environment specific soil tension thresholds have been identified for non-ponded rice production to save water without adverse yield consequences. However, soil tension readings are point-source measures that are not necessarily representative of a given irrigation area/paddy and become costly when required in each paddy. Remote sensing offers spatial advantages and has been demonstrated in many crops to accurately estimate crop evapotranspiration (ETc), which is often used to schedule irrigation. This study uses soil moisture tension (SMT) data measured in a commercial aerobic rice experiment conducted in temperate Australia on a heavy clay soil to demonstrate the relationship between soil tension and remotely sensed estimated cumulative ETc between irrigation events using open access satellite imagery. The model was used to predict SMT in the second growing season during the vegetative period after establishment until PI with a root mean squared error of AE5.8 kPa. This demonstrates the ability of irrigators to schedule irrigation in water saving rice using open satellite-derived data that can be incorporated into an automated irrigation system, without the need for costly in-field soil moisture sensors. Future research to integrate forecast crop evapotranspiration could enable soil moisture forecasting days in advance, providing irrigators more time to plan irrigation activities.

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Rice

Cited by 13 publications

References 308 publications

Seed priming with selenium and zinc nanoparticles modifies germination, growth, and yield of direct-seeded rice (Oryza sativa L.)

Seed priming with selenium and zinc nanoparticles modifies germination, growth, and yield of direct-seeded rice (Oryza sativa L.)

Progress Towards Perennial Grains for Prairies and Plains

Remote sensing to predict soil moisture tension in water saving rice systems of temperate South-Eastern Australia

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