Using improved variety and management enhances rice productivity in stagnant flood -affected tropical coastal zones

Sarangi, Sukanta K.; Maji, B.; Singh, Sudhanshu; Sharma, Dinesh Kumar; Burman, D.; Mandal, Subhasis; Singh, U. S.; Haefele, Stephan M.

doi:10.1016/j.fcr.2015.10.024

Cited by 38 publications

(29 citation statements)

References 24 publications

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“…This indicates poor rate of K utilization at higher application rates. This might be due to the curvilinear return to the conversion of K to seed as yield approaches the ceiling at higher K-levels [24,45]. The fertilizer productivity decreased to a greater degree passing from 30 to 60 kg K 2 O ha −1 (PFP 117.33 kg grain kg −1 of K-fertilizer) than passing from 60 to 90 (PFP 84.00 kg grain kg −1 K) or 90 to 120 (PFP 62.42 kg grain kg −1 K).…”

Section: Discussionmentioning

confidence: 99%

“…Post-emergence application of Bispyribac sodium 10% soluble concentrates/SC (Nominee Gold) at 200 mL ha −1 at 15 days after transplanting (DAT) followed by one hand weeding (HW) at 42 DAT were done to promote early crop growth by controlling weeds. Other agronomic management practices were followed based on recommended standards for the coastal region of West Bengal [24] and were applied uniformly across all treatments. The crop was harvested in the first week of November when 80% of the grains in the panicles were ripe, and later dried, winnowed, and weighed for yield estimation.…”

Section: Treatment Arrangements and Cultural Practicesmentioning

confidence: 99%

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Optimizing Potassium Application for Hybrid Rice (Oryza sativa L.) in Coastal Saline Soils of West Bengal, India

Banerjee

Ray

Dutta³

et al. 2018

Agronomy

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The present study assesses the response of hybrid rice (variety Arize 6444) to potassium (K) application during rainy (wet) seasons of 2016 and 2017 in coastal saline soils of West Bengal, India. The study was conducted at the Regional Research Farm, Bidhan Chandra Krishi Viswavidyalaya, Kakdwip, West Bengal. The soil is clayeywith acidic pH (5.91), saline (Electrical conductivity/EC 1.53 dS m−1) and of high K fertility (366 kg ha−1). The experimental plots were laid out in a randomized complete block design with five (5) K treatments (0, 30, 60, 90, and 120 kg K2O ha−1) with four replications. Plant height, dry matter (DM) in different plant parts, number of tillers, and grain yield were measured in each treatment for the determination of optimum K dose. The study revealed that the stem, leaf, and grain dry matter production at 60 days after transplanting (DAT) and harvest were significantly (p ≤ 0.05) higher at 90 kg K2O ha−1 application. The number of tillers hill−1 was also higher (p ≤ 0.05) in plants fertilized with 90 kg K2O ha−1 over K omission. At harvest, grain K concentration improved (p ≤ 0.05) with K fertilization at 90 kg K2O ha−1, 116% more than the zero-K. Omission of K application from the best treatment (90 kg K2O ha−1) reduced grain yield by 3.5 t ha−1 even though the available K content was high. Potassium uptake restriction due to higher Mg content in the soil may have caused reduced uptake of K leading to yield losses. The present study also showed higher profits with 90 kg K2O ha−1 with higher net returns (US$ 452 ha−1) and benefit:cost ratio (1.75) over other treatments from hybrid rice (var. Arize 6444). From the regression equation, the economic optimum level of K (Kopt) was derived as 101.5 kg K2O ha−1 that could improve productivity of hybrid rice during the wet season in coastal saline soils of West Bengal.

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Section: Discussionmentioning

confidence: 99%

Section: Treatment Arrangements and Cultural Practicesmentioning

confidence: 99%

Optimizing Potassium Application for Hybrid Rice (Oryza sativa L.) in Coastal Saline Soils of West Bengal, India

Banerjee

Ray

Dutta³

et al. 2018

Agronomy

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“…Sarangi et al [149] describe the higher productivity achieved with the new rice variety, Amal-Mana, in stagnant flooding conditions in trials conducted on farms and on experiment stations in West Bengal. In addition to producing higher yields, the quality of the grain is superior for cooking and eating, in comparison with traditional rice varieties [149]. Researchers with Kasetsart University and several rice research centers in Thailand have developed a new variety of rice (Hom Mali 821), which is tolerant of flash flooding, moderately resistant to brown planthoppers, and has excellent grain quality [150].…”

Section: National and International Investmentsmentioning

confidence: 99%

“…Scientists at the International Rice Research Institute and in several national research centers are developing flood-tolerant varieties with enhanced resistance to submergence [147,148]. Sarangi et al [149] describe the higher productivity achieved with the new rice variety, Amal-Mana, in stagnant flooding conditions in trials conducted on farms and on experiment stations in West Bengal. In addition to producing higher yields, the quality of the grain is superior for cooking and eating, in comparison with traditional rice varieties [149].…”

Section: National and International Investmentsmentioning

confidence: 99%

Managing Water and Soils to Achieve Adaptation and Reduce Methane Emissions and Arsenic Contamination in Asian Rice Production

Wichelns

2016

Water

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Rice production is susceptible to damage from the changes in temperature and rainfall patterns, and in the frequency of major storm events that will accompany climate change. Deltaic areas, in which millions of farmers cultivate from one to three crops of rice per year, are susceptible also to the impacts of a rising sea level, submergence during major storm events, and saline intrusion into groundwater and surface water resources. In this paper, I review the current state of knowledge regarding the potential impacts of climate change on rice production and I describe adaptation measures that involve soil and water management. In many areas, farmers will need to modify crop choices, crop calendars, and soil and water management practices as they adapt to climate change. Adaptation measures at the local, regional, and international levels also will be helpful in moderating the potential impacts of climate change on aggregate rice production and on household food security in many countries. Some of the changes in soil and water management and other production practices that will be implemented in response to climate change also will reduce methane generation and release from rice fields. Some of the measures also will reduce the uptake of arsenic in rice plants, thus addressing an important public health issue in portions of South and Southeast Asia. Where feasible, replacing continuously flooded rice production with some form of aerobic rice production, will contribute to achieving adaptation objectives, while also reducing global warming potential and minimizing the risk of negative health impacts due to consumption of arsenic contaminated rice.

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“…Suitable soil amendment recommendations specific for rainfed lowland rice are currently not available (Sarangi et al 2016). Thus, providing recommendations that require relatively less investments but have higher returns are likely to be adopted by farmers (Linquist and Sengxua 2001).…”

Section: Introductionmentioning

confidence: 99%

An application of blended amendments in monsoon rice field

Ghosh

Devi

2017

Ecol Process

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Introduction: Rice is the main food crop of the world, and the cultivation of rice crop during the monsoon season is hard due to the rain-induced waterlogging. Apart from this, farmers in north-eastern regions of India often implement improper crop management leading to poor yields. Thus, the development of suitable management practices under improved varieties of rice become essential for increasing rice productivity, improving soil quality status and reducing methane emission. Methods: The aim of the study was to investigate the variation in soil properties, crop growth and methane emission under the application of an inorganic fertiliser as well as its mixtures with both inorganic and plant materials. In such an attempt, a field-based experiment was conducted with the rice variety Chandrama during 2015 in slightly acidic soil having sandy loam texture. Five amendments, i.e. NPK and NPK, blended separately with magnesium sulphate, fresh neem (Azadirechta indica) leaves, used tea (Camellia sinensis var. assamica) leaves, and fresh karanj (Pongamia glabra) leaves were used for the study with four replications each. Results: Application of NPK separately with the leaves of neem, tea and karanj separately at the onset of monsoon season markedly affected the soil porosity and the water-holding capacity of the soil. However, in comparison with sole NPK fertilisation, a significance increase in soil organic matter accumulation (2.48 ± 0.10%) was seen only for karanjblended NPK while magnesium sulphate-blended NPK showed the lowest methane emission (0.30 ± 0.01 mg/m

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Using improved variety and management enhances rice productivity in stagnant flood -affected tropical coastal zones

Cited by 38 publications

References 24 publications

Optimizing Potassium Application for Hybrid Rice (Oryza sativa L.) in Coastal Saline Soils of West Bengal, India

Optimizing Potassium Application for Hybrid Rice (Oryza sativa L.) in Coastal Saline Soils of West Bengal, India

Managing Water and Soils to Achieve Adaptation and Reduce Methane Emissions and Arsenic Contamination in Asian Rice Production

An application of blended amendments in monsoon rice field

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