Comparative Evaluation of Seed and Grain Quality Parameters of Rice (Oryza sativa L.) Varieties under SRI and Conventional Methods of Rice Cultivation

mar, Ku; Rao, L. V. Subba; Keshavulu, K.

doi:10.20546/ijcmas.2017.608.442

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…Copper oxychloride is a contact fungicide that has a long history of controlling late blight (Large, 1945) and other diseases (Kumar, Rao, & Keshavulu, 2017; Schutte, Beeton, & Kotzé, 1997). Copper oxychloride was included in both years and reduced the disease severity in the first year but not in the second year.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of fungicides to control potato late blight (Phytophthora infestans) in the plains of Nepal

Khadka

Chaulagain

Subedi³

et al. 2020

Journal of Phytopathology

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Fungicide application is an effective management option to control late blight of potato (caused by Phytophthora infestans). Field experiments were conducted to evaluate the efficacy of recently introduced and previously used fungicides on late blight management and potato yields in the western plains of Nepal in 2015 and 2016 crop seasons. Fungicides and a non-treated control (NTC) were replicated three times in a randomized block design planted with late blight susceptible cultivar Cardinal. Chlorothalonil, copper oxychloride, dimethomorph, fenamidone + mancozeb, mancozeb and metalaxyl were sprayed in 2015. In 2016, carbendazim was used instead of chlorothalonil. The area under disease progress curve (AUDPC) was consistently reduced in years by dimethomorph (90% and 65% in 2015 and 2016, respectively), fenamidone + mancozeb (68% and 62%) and mancozeb (40% and 47%) compared with the NTC. Similarly, tuber yield was increased with the application of dimethomorph (266% and 146% in 2015 and 2016, respectively), fenamidone + mancozeb (211% and 155%) and mancozeb (136% and 116%) compared with the NTC. Chlorothalonil reduced AUDPC by 43% and increased tuber yield by 170% in 2015. Other fungicides either had inconsistent results or did not reduce late blight severity and consequent effects on potato yield. The overall benefit-cost ratio was highest for dimethomorph in both years. These results show efficacy of dimethomorph, fenamidone + mancozeb and mancozeb in reducing late blight severity and increasing potato tuber yield in the plains of Nepal. K E Y W O R D S disease management, foliar fungicide, late blight, potato

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Section: Discussionmentioning

confidence: 99%

Evaluation of fungicides to control potato late blight (Phytophthora infestans) in the plains of Nepal

Khadka

Chaulagain

Subedi³

et al. 2020

Journal of Phytopathology

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“…Aside from improved yield, input costs are reduced for seed, energy, and fertilizer, leading to higher returns for farmers [88,89]. SRI also produces rice seed and grains that are of higher quality than CRC rice and thus may command a higher market price [90], and the plants are more resistant to biotic and abiotic stresses [19] as well as being more resilient to cold temperatures, storm damage, and pests and diseases [91,92]. The latter effects become all the more important as a consequence of climate change.…”

Section: Synergies Between Awd and Sri In Farmer Transitionsmentioning

confidence: 99%

Exploring the Impact of Alternate Wetting and Drying and the System of Rice Intensification on Greenhouse Gas Emissions: A Review of Rice Cultivation Practices

Dahlgreen,

Parr

2024

Agronomy

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Rice provides ~20% of human dietary energy and, for many people, a similar share of their protein. Rice cultivation, however, produces significant greenhouse gas (GHG) emissions, comparable to those from the aviation sector. The main GHG from rice production is methane, mostly a result of conventional rice cultivation (CRC) keeping rice fields continuously flooded during the crop cycle. There is extensive evidence that alternate wetting and drying (AWD) of rice fields substantially reduces methane emissions. AWD is one component of the System of Rice Intensification (SRI), an agroecological approach to the management of plants, water, soil, and nutrients. This article reviews field studies measuring GHG emissions associated with the adoption of AWD and SRI. The review confirms that both AWD and SRI offer substantial reductions in methane emissions per hectare compared with CRC. These benefits are, however, partly offset by increases in emissions of nitrous oxide and carbon dioxide. The studies also show that SRI (but not AWD) improves yield and therefore further reduces GHG emissions per kg of rice. The review concludes that while both AWD and SRI substantially reduce emissions per hectare and per kilogram of rice, SRI can simultaneously contribute to food security while addressing the drivers of climate change. Further investigation of carbon emissions and sequestration under different rice cultivation methods is needed to strengthen the evidence base.

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“…Aside from improved yield, input costs are reduced for seed, energy and fertilizer, leading to higher returns for farmers [44]. SRI also produces rice seed and grains that are of higher quality than CRC rice [45], and the plants are more resistant to biotic and abiotic stresses [13] as well as being more resilient to cold temperatures, storm damage, and pests and diseases [46,47]. Of course, if farmers can move directly from CRC to SRI practices, so much the better.…”

Section: Synergies Between Awd and Sri In Farmer Transitionsmentioning

confidence: 99%

The Impact on Greenhouse Gas Emissions of Rice Cultivation under Alternate Wetting and Drying and the System of Rice Intensification

Dahlgreen,

Parr

2023

Preprint

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Rice provides ~20% of human dietary energy and, for many people, a similar share of their protein. Rice cultivation, however, produces significant greenhouse gas (GHG) emissions, comparable to those from the aviation sector. The main GHG from rice production is methane, mostly a result of conventional rice cultivation (CRC) keeping rice fields continuously flooded during the crop cycle. There is extensive evidence that alternate wetting and drying (AWD) of rice fields substantially reduces methane emissions. AWD is one component of the System of Rice Intensification (SRI), an agroecological approach to the management of plants, water, soil and nutrients practiced by millions of farmers in both lowland irrigated rice and upland rainfed cultivation. Thirteen countries have included SRI in their Nationally Determined Contributions to GHG reduction or climate change mitigation. This article reviews 16 field studies of the net reduction in GHG emissions from the adoption of AWD, eight from the adoption of SRI, and two that compared SRI and AWD. Where available, the review includes data on yield and therefore on carbon dioxide-equivalent GHG emissions per kilogram of rice produced. The evidence indicates that AWD and SRI offer a similar and substantial reduction (~35–41%) in GHG emissions per hectare compared with conventional rice cultivation. However, SRI offers ~66% greater yield than CRC, and therefore greater reduction in emissions per kilogram of rice, ~54% more than AWD. The limited data directly comparing SRI and AWD support this finding. SRI also appears to have greater potential to sequester carbon in the soil. SRI lowers rice farmers’ costs of production, adds to their income and can make climate-friendly methods more attractive. Both AWD and SRI are greatly preferable to current conventional practices, but SRI offers opportunities to contribute to food security while directly addressing the drivers of climate change.

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Comparative Evaluation of Seed and Grain Quality Parameters of Rice (Oryza sativa L.) Varieties under SRI and Conventional Methods of Rice Cultivation

Cited by 5 publications

References 5 publications

Evaluation of fungicides to control potato late blight (Phytophthora infestans) in the plains of Nepal

Evaluation of fungicides to control potato late blight (Phytophthora infestans) in the plains of Nepal

Exploring the Impact of Alternate Wetting and Drying and the System of Rice Intensification on Greenhouse Gas Emissions: A Review of Rice Cultivation Practices

The Impact on Greenhouse Gas Emissions of Rice Cultivation under Alternate Wetting and Drying and the System of Rice Intensification

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