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

Khadka, Ram Bahadur; Acharya, Hari P; Uphoff, Norman

doi:10.3126/aej.v15i0.19809

Cited by 6 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our second study, we observed no significant difference in yield between the improved dwarf variety Sukhadhan-3 and the heirloom, photoperiod-insensitive variety Tilkidhan. This result is consistent with a previous evaluation (Khadka, Acharya & Uphoff, 2014) in which, under SRI management, a two-fold increase in yield was observed from a locally-adopted rice variety known as Hansaraj Basmati in Bajang district of Nepal in the foothills of the Himalayas. Similarly, Ahmed, Dutta & Ray (2015) also found the traditional variety Koiya Boro under SRI management giving a 16% higher yield compared to that from currently recommended practices, and a 33% increase compared to traditional cultivation practices.…”

Section: Discussion Of Results Through Rank-ordering and Multiple Facsupporting

confidence: 92%

Effects ofTrichodermaseedling treatment with System of Rice Intensification management and with conventional management of transplanted rice

Khadka

Uphoff

2019

PeerJ

Self Cite

View full text Add to dashboard Cite

Many benefits of Trichoderma inoculation for improving crop production have been documented, including growth and yield enhancement and the alleviation of biotic and abiotic stresses. However, because rice is usually cultivated under continuous flooding that creates anaerobic soil conditions, this limits the benefits of these beneficial fungi. Cultivating rice with the methods of the System of Rice Intensification (SRI) provides rice plants with a more favorable environment for their colonization by beneficial microbes in the soil because the soil is more aerobic under SRI management and contains more organic matter. This study evaluated the effects of Trichoderma inoculation of rice plants under SRI management compared with transplanted and flooded rice plants, considering also the effects of different means of fertilization and different varieties in rice. Experiments were conducted in 2015 and 2016 under the tropical climate of Nepal’s western terai (plains) during both the rainy season (July to November) and the dry season (March to July). The results indicated significantly better performance (P = 0.01) associated with Trichoderma inoculation for both seasons and for both systems of crop management in terms of grain yield and other growth-contributing factors, compared to non-inoculated rice cropping. Relatively higher effects on grain yield were recorded also with organic compared to inorganic fertilization; for unimproved (heirloom) varieties compared with improved varieties; and from SRI vs. conventional flooded crop management. The yield increase with Trichoderma treatments across all trials was 31% higher than in untreated plots (4.9 vs 4.5 mt ha−1). With Trichoderma treatment, yields compared with non-treated plots were 24% higher with organic SRI (6.38 vs 5.13 mt ha−1) and 52% higher with non-organic SRI (6.38 vs 3.53 mt ha−1). With regard to varietal differences, under SRI management Trichoderma inoculation of the improved variety Sukhadhan-3 led to 26% higher yield (6.35 vs 5.04 mt ha−1), and with the heirloom variety Tilkidhan, yield was 41% higher (6.29 vs 4.45 mt ha−1). Economic analysis indicated that expanding the organic cultivation of local landraces under SRI management should be profitable for farmers where such rice has a good market price due to its premium quality and high demand and when SRI enhances yield. These varieties’ present low yields can be significantly increased by integrating Trichoderma bio-inoculation with SRI cultural methods. Other recent research has shown that such inoculation can be managed profitably by farmers themselves.

show abstract

Section: Discussion Of Results Through Rank-ordering and Multiple Facsupporting

confidence: 92%

Effects ofTrichodermaseedling treatment with System of Rice Intensification management and with conventional management of transplanted rice

Khadka

Uphoff

2019

PeerJ

Self Cite

View full text Add to dashboard Cite

show abstract

“…Highest grain yield was observed in SRI (6.13 tonha -1 ) followed by traditional transplanting (5.82 tonha -1 ). Other researchers also reported highest grain yield for SRI (Duttarganvi et al, 2016;Tomar et al, 2018;Bhandari et al, 2020;Chen et al, 2013;Khadka et al, 2014). Lowest grain yield was observed in Wet DSR broadcasting (4.92tonha-1).…”

Section: Resultsmentioning

confidence: 79%

Response of Different Seedling Establishment Methods on Growth and Yield of Rice in Terai Region of Nepal

Rai,

Kulung,

Rana

et al. 2023

Review.food.agr.

View full text Add to dashboard Cite

The experiment was conducted at Agronomy farm, Rampur Campus, Chitwan to evaluate the effect of seedlings establishment methods on growth and yield of main season rice, 2021. RCBD design was used with four replications and six treatments viz. T1- Farmers’ practice (random transplanting), T2- traditional transplanting (20cm*20cm), T3- System of Rice Intensification, T4- non-puddled transplanting, T5- wet DSR (broadcasting), and T6- wet DSR (line-sowing). The foundation seed of Ramdhan was used as a study material. Data were recorded on different growth, yield and yield attributing traits. ANOVA revealed statistically significant differences (p<0.05) for all parameters except number of effective tillers m-2, number of unfilled grains panicle-1 and sterility percentage. Lowest effective tillers m-2, biological yield, number of filled and total grains panicle-1 was observed in T6 resulting in lower grain yield (4.92 tonha-1). Highest thousand grains weight (23.18gm), grain yield (6.13 tonha-1), and harvest index (22.13%) were recorded in T3. The highest grain yield of T3 was followed by T2 (5.82tonha-1) at par with T1 (5.73tonha-1). The minimum sterility percentage was 30.49% in T4. Plant height at 120 DAS, number of tillers hill-1 120 DAS, number of leaves hill-1 105DAS, LAI 105DAS, panicle length and no. of filled grains panicle-1 expressed a positive correlation with grain yield. The regression value showed that the maximum variation in grain yield was governed by PH at 120DAS (62.37%), LAI at 105 DAS (61.85%), and panicle length (47.04%) primarily.

show abstract

“…Effective tillers showed a higher percentage under the SRI method (87.9%) compared to conventional management (84.5%) (Khadka et al, 2014). The number of tillers per hill increased significantly at the 40 × 40 cm spacing at 30 DAT.…”

Section: Effects On Yield Attributesmentioning

confidence: 92%

Effects of Seedling and Plant Spacing on the System of Rice Intensification (SRI) for Spring Rice (Oryza sativa L. Chaite 2)

Banjade,

Khanal,

Shrestha

et al. 2023

AgroEnviron. Sustain.

View full text Add to dashboard Cite

System of Rice Intensification (SRI technology) increases rice yields while requiring less water and other inputs. It involves the use of specific management strategies that, when used together, provide rice plants with better-growing conditions than those grown using traditional methods, especially in the root zone. An SRI experiment was conducted from February 27, 2022, to July 11, 2022, in rice farmers' fields in Buddhabhumi Municipality, Nepal, using different spacing and seedlings. Spring rice was grown using the SRI with a variety of seeding and plant spacing. The experiment consisted of three plant spacings: 20 × 20, 30 × 30, and 40 × 40 cm, and two seeding groups: regular seeding and pregerminated seedlings. Characteristics were counted, including the number of tillers per mound, leaves, plant height, tillers per square meter, grain yield, and 1000 kernel weight. The result shows that the 20 cm × 20 cm spacing increased tillers per square meter. The spacing also resulted in much higher grain production of 4.29337 Mt/ha. The 30 × 30 cm plot had the tallest plants at 78.10 cm, much higher than the other plots. Similar crops produced significantly more tillers per mound (22.5) when planted at 40 × 40 cm spacing. Since the crops were planted at 40 × 40 cm, the spacing produced significantly more tillers per mound (22.57) and leaves per mound (73.54). Spacing did not affect test weight, nor did the type of seedlings used.

show abstract

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

Abstract: Participatory action research was conducted in were, respectively, 24.5 vs. 11.3, 21.5 vs. 9.5, 305 vs. 273, 273.5 vs. 233.8, and 7.6 vs. 4.46

Cited by 6 publications

References 14 publications

Effects ofTrichodermaseedling treatment with System of Rice Intensification management and with conventional management of transplanted rice

Effects ofTrichodermaseedling treatment with System of Rice Intensification management and with conventional management of transplanted rice

Response of Different Seedling Establishment Methods on Growth and Yield of Rice in Terai Region of Nepal

Effects of Seedling and Plant Spacing on the System of Rice Intensification (SRI) for Spring Rice (Oryza sativa L. Chaite 2)

Contact Info

Product

Resources

About