Performance evaluation of rice varieties under the System of Rice Intensification compared with the conventional transplanting system

Thakur, A. K.; Rath, Sreelata; Kumar, Ashwani

doi:10.1080/03650340903302302

Cited by 24 publications

(16 citation statements)

References 21 publications

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“…A significant difference was observed in the Chlorophyll-a and Chlorophyll-b content of the rice plants grown under SRI and SRIBI (p ≤ 0.05). A higher chlorophyll content in SRI as compared to the conventional flooded rice (CFR) has also been reported in previous studies [63]. While the mean value of Chlorophyll-a was 9.3 for CFR and SRI, it was 13.2 for SRIBI (SRI+I), which was significantly higher (p = 0.05) than that of SRI (9.2) (Figure 12).…”

Section: Chlorophyll Contentsupporting

confidence: 82%

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Intercropping in Rice Farming under the System of Rice Intensification—An Agroecological Strategy for Weed Control, Better Yield, Increased Returns, and Social–Ecological Sustainability

et al. 2021

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Rice is the staple food for more than half of the world’s population. In South Asia, rice farming systems provide food to the majority of the population, and agriculture is a primary source of livelihood. With the demand for nutritious food increasing, introducing innovative strategies in farming systems is imperative. In this regard, intensification of rice farming is intricately linked with the challenges of water scarcity, soil degradation, and the vagaries of climate change. Agroecological farming systems like the System of Rice Intensification (SRI) have been proposed as water-saving and sustainable ways of food production. This study examines the effect of intercropping beans with rice under SRI management on the growth of weeds and on the different plant growth parameters. Intercropping led to a 65% decrease in weed infestation on average, which is important given that weed infestation is stated as a criticism of SRI in some circles and is a major factor in limiting yield in rice-producing regions. In addition to the water savings of about 40% due to the SRI methodology, the innovation led to an increase in rice yield by 33% and an increase in the net income of farmers by 57% compared to the conventional rice farming method. The results indicate that intercropping can be a positive addition to the rice farming system, hence contributing to social–ecological sustainability.

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Section: Chlorophyll Contentsupporting

confidence: 82%

“…than in the SRI-based techniques [53,56]. A higher chlorophyll content in the leaves has been linked to a higher photosynthesis rate and root activity [63].…”

Section: Tiller Numbermentioning

confidence: 99%

Intercropping in Rice Farming under the System of Rice Intensification—An Agroecological Strategy for Weed Control, Better Yield, Increased Returns, and Social–Ecological Sustainability

et al. 2021

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“…During the ripening stage, hills with wider spacing had larger root dry weights, produced greater xylem exudates and transported these towards the shoot at faster rates. These features contribute to the maintenance of higher chlorophyll levels, enhanced fluorescence and NPR of leaves of widely than closely spaced plants (Thakur et al ., 2010, 2011). Differences between two rice varieties for NPR could be due to variation in the genetic potential make-up of these varieties.…”

Section: Discussionmentioning

confidence: 99%

Irrigation, Spacing and Cultivar Effects on Net Photosynthetic Rate, Dry Matter Partitioning and Productivity of Rice Under System of Rice Intensification in Mollisols of Northern India

Dass

Chandra

2013

Ex. Agric.

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SUMMARYField experiments were conducted on a Typic Hapludoll (Mollisols) soil in the Indo-Gangetic Plains of India during the 2008 and 2009 rainy seasons to (1) find out the effect of irrigation schedules and plant spacing on physiological parameters, yield and water productivity of two rice cultivars under System of Rice Intensification (SRI), and (2) compare the performance of SRI with conventional transplanting (CT). Treatments under SRI included 12 combinations of three irrigation schedules, viz. irrigation at 1, 3 and 5 day(s) after disappearance of ponded water (DADPW), two spacing intervals (20 × 20 cm and 25 × 25 cm) and two cultivars (‘Pant Dhan 4’ and ‘Hybrid 6444’). The two control treatments were the CT of each cultivar. The experiment was set in a factorial randomized complete block design replicated thrice. The net photosynthetic rate (NPR) of the topmost fully expanded leaf at tillering and that of flag-leaf at flowering stage was affected significantly by irrigation schedules. Irrigating rice crop at 1 or 3 DADPW, being at par with each other, recorded significantly higher NPR than 5 DADPW. The increase in NPR at 1 and 3 DADPW was 17.1% and 8.4% at tillering and 13.6% and 6.1% at flowering stage, respectively, compared with that at 5 DADPW (tillering: 12.78 μmol CO2 m−2 S−1, flowering: 16.01 μmol CO2 m‑2 S−1). At closer spacing (20 × 20 cm) the cultivars did not differ significantly for NPR; however, at wider spacing (25 × 25 cm), ‘Hybrid 6444’ showed significantly higher NPR than ‘Pant Dhan 4’. Between two methods, SRI recoded higher NPR. Dry matter accumulation (DMA) in leaves and grains declined with delay in irrigation from 1 to 5 DADPW. Wider spacing significantly enhanced DMA in stems and grains. ‘Hybrid 6444’ showed higher DMA in all plant parts than ‘Pant Dhan 4’. Grain yield was not affected significantly by irrigation schedules in 2008, while in 2009, irrigation at 1 and 3 DADPW resulted in 12.8% and 8.0% higher grain yield, respectively, than 5 DADPW (5.84 t ha−1). Wider spacing was superior to closer spacing. SRI improved grain yield by 16.9% and water productivity by 18.5% over CT.

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“…Varieties which have high tillering ability perform better as compared to low-tillering varieties under SRI method, due to wider spacing (Sarath and Thilak 2004;Thakur et al 2011b). Chapagain and Yamaji (2010) and Thakur et al (2010a) have also reported that SRI management promotes better root growth, greater number of effective tillers per hill, longer panicles, and greater number of filled grains per panicle over conventional management.…”

Section: Resultsmentioning

confidence: 99%

Performance of landrace and improved rice varieties under the system of rice intensification management in Bajhang District of Nepal

Khadka¹,

Acharya²,

Uphoff

2014

J. Agric. & Environ.

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Performance evaluation of rice varieties under the System of Rice Intensification compared with the conventional transplanting system

Cited by 24 publications

References 21 publications

Intercropping in Rice Farming under the System of Rice Intensification—An Agroecological Strategy for Weed Control, Better Yield, Increased Returns, and Social–Ecological Sustainability

Intercropping in Rice Farming under the System of Rice Intensification—An Agroecological Strategy for Weed Control, Better Yield, Increased Returns, and Social–Ecological Sustainability

Irrigation, Spacing and Cultivar Effects on Net Photosynthetic Rate, Dry Matter Partitioning and Productivity of Rice Under System of Rice Intensification in Mollisols of Northern India

Performance of landrace and improved rice varieties under the system of rice intensification management in Bajhang District of Nepal

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