Performance of direct-seeded rice under various dates of sowing and irrigation regimes in semi-arid region of India

Dari, Biswanath; Sihi, Debjani; Bal, Santanu Kumar; Kunwar, Sanju

doi:10.1007/s10333-016-0557-8

Cited by 20 publications

(16 citation statements)

References 22 publications

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“…Soil microbial composition varies with increasing soil depth, and microbial diversity commonly declines with depth [5,6]. Advanced intensive agriculture systems have made a considerable contribution to enhancing crop production and meeting the world's food demands [7,8]. Despite the positive impact on crop production, maintaining soil health and biodiversity has become an increasingly severe obstacle to modern agricultural systems [9,10].…”

Section: Introductionmentioning

confidence: 99%

Bacteria with Different Assemblages in the Soil Profile Drive the Diverse Nutrient Cycles in the Sugarcane Straw Retention Ecosystem

et al. 2019

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Straw retention, an alternative to artificial fertilization, commonly mitigates soil degradation and positively affects soil fertility. In this study, we investigated the succession of soil bacteria during two sugarcane straw retention treatments (control (CK) and sugarcane straw retention (SR)) and at four depths (0–10, 10–20, 20–30, and 30–40 cm) in fallow soil in a sugarcane cropping system. Using an Illumina MiSeq (16S rRNA) and soil enzyme activity, we explored the SR influence on soil bacterial communities and enzyme activities and its inclusive impact on soil fertility, with an emphasis on topsoil (0–10 cm) and subsoil (10–40 cm). Our results show that SR effectively improved soil fertility indicators (C, N, and P), including enzyme activities (C and N cycling), throughout the soil profile: these soil parameters greatly improved in the topsoil compared to the control. Sugarcane straw retention and soil depth (0–10 cm vs. 10–40 cm) were associated with little variation in bacterial species richness and alpha diversity throughout the soil profile. Subsoil and topsoil bacterial communities differed in composition. Compared to the CK treatment, SR enriched the topsoil with Proteobacteria, Verrucomicrobia, Actinobacteria, Chloroflexi, and Nitrospirae, while the subsoil was depleted in Nitrospirae and Acidobacteria. Similarly, SR enriched the subsoil with Proteobacteria, Verrucomicrobia, Actinobacteria, Chloroflexi, Gemmatimonadetes, and Bacteroidetes, while the topsoil was depleted in Acidobacteria, Gemmatimonadetes, and Planctomycetes compared to the CK. At the genus level, SR enriched the topsoil with Gp1, Gp2, Gp5, Gp7, Gemmatimonas, Kofleria, Sphingomonas, and Gaiella, which decompose lignocellulose and contribute to nutrient cycling. In summary, SR not only improved soil physicochemical properties and enzyme activities but also enriched bacterial taxa involved in lignocellulosic decomposition and nutrient cycling (C and N) throughout the soil profile. However, these effects were stronger in topsoil than in subsoil, suggesting that SR enhanced fertility more in topsoil than in subsoil in fallow land.

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Section: Introductionmentioning

confidence: 99%

Bacteria with Different Assemblages in the Soil Profile Drive the Diverse Nutrient Cycles in the Sugarcane Straw Retention Ecosystem

et al. 2019

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“…Irrigation at IW/CPE 1.2 and 0.9 significantly enhanced grain yield over waterstressed rainfed crop ( Table 2). The similar effects of irrigation regimes were also reported Frequent irrigations (at desirable soil water conditions enabling the rice plants grow copiously and yield higher grain and biomass by climate and enhanced solubility of nutrients in the soil and higher absorption, translocation and assimilation of nts, especially P, iron (Fe) and manganese (Mn) by the plants for various physiological [22,7]. Effect of soil adjuvant on grain -significant.…”

Section: Biological Yieldsmentioning

confidence: 64%

“…The similar effects of irrigation regimes were also reported on biological yield. Frequent irrigations (at IW/CPE 1.5 and 1.2) created desirable soil water conditions enabling the rice plants grow copiously and yield higher grain and biomass by providing conducive micro-climate and enhanced solubility of nutrients in the soil and higher absorption, translocation and assimilation of nutrients, especially P, iron (Fe) and manganese (Mn) by the plants for various physiological processes [22,7]. Effect of soil adjuvant on grain and biological yields was nonwas due to higher rainfall after the application of the adjuvant, which nullified its positive impact on soil moisture-retention longevity.…”

Section: Grain and Biological Yieldsmentioning

confidence: 99%

“…Maheswari et al [5] observed higher growth and yield of aerobic rice under irrigations scheduled at IW/CPE 1.2. Whereas, Malamasuri et al [6] and Dari et al [7], reported higher yield of direct-seeded rice (DSR) under irrigations applied at IW/CPE ratio 1.5-2.0. However, irrigating DSR at such a higher IW/CPE ratio (>1.5) envisaging irrigations at relatively shorter intervals compared to lower IW/CPE ratio, may not be feasible under evergrowing shortage of irrigation water across the world.…”

Section: Introductionmentioning

confidence: 99%

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Agronomic Practices to Enhance Nutrient Acquisition, Grain Quality, Resource-Use Efficiency in Direct- Seeded Aerobic Rice in Eastern India

Singh

Dass

Dhar

et al. 2020

CJAST

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Aim: Rice (Oryza sativa L.) is mainly grown in the rainy season in eastern India on rainfed uplands with a low average productivity of 1.0-1.4 t ha-1. Erratic rainfall leading to moisture stress and poor cultivation practices are the key reasons for low yields and rice grain quality in the area. Hence, the current study was designed to investigate the effects of irrigation scheduling, soil adjuvant and sowing methods on yield, grain quality and resource-use efficiency in aerobic rice. Methodology: The experiment was conducted in a three-time replicated split-plot design during rainy-season of 2016 on a sandy loam soil in Eastern India. Treatments included 8 combinations of 4-irrigation schedules, viz., irrigation at IW/CPE 0.9, 1.2, 1.5 and no-irrigation (rainfed) and 2-soil adjutants (soil adjuvant applied and no-soil adjuvant) assigned to main-plots, and 2-planting methods (conventional dry seeding at 20 cm row spacing and spot-sowing (dibbling of 4-seeds hill-1 at 20×15 cm interval) assigned to sub-plots. Results: Irrigation at IW/CPE 1.5 increased grain yield by 37.3% over rainfed crop, 23% over crop irrigated at IW/CPE 0.9 and 13.5% over IW/CPE 1.2. Grain quality parameters were also best, in crop watered at IW/CPE 1.5. Net return, B: C ratio, net energy output, production efficiency (PE) and monetary efficiency (ME) were significantly greater with irrigation at IW/CPE 1.5 compared to other irrigation schedules. Spot-sowing proved superior to conventional drilling of seeds exhibiting about 7% improvement in grain yield and water-use efficiency (WUE). Effect of soil adjuvant application was not significant. Interpretation: This study emphatically demonstrated that aerobic rice should be spot-sown and irrigated at IW/CPE 1.5, for obtaining higher yield with better grain quality. The findings are useful for aerobic rice production in eastern India and adjoining sub-humid regions.

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“…Scheduling of irrigation in irrigated dry aerobic rice plays a major role in obtaining higher yields as well as higher water productivity [7]. Effective tillers and grain yield of rice increased with the decrease in irrigation interval up to 5 days and any further decrease in irrigation interval did not prove beneficial [8] [9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Varied Irrigation Scheduling with Levels and Times of Nitrogen Application on Yield and Water Use Efficiency of Aerobic Rice

Keerthi¹,

Babu²,

Venkataraman³

et al. 2018

AJPS

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More rice needs to be produced with lesser water to feed the increasing human population. Judicious water management practices and appropriate water saving technologies in rice cultivation are in need in the coming decades. Aerobic rice is one of water saving method of rice cultivation. The field experiment was conducted during Summer season of February 2018 to May 2018 at Tamil Nadu Agricultural University, Agricultural College and Research Institute, Madurai, to find out the effect of irrigation schedules with varied doses and time of nitrogen application on yield of aerobic rice. Irrigation scheduling of IW/CPE (Irrigation Water/Cumulative Pan Evaporation) 1.0 up to panicle initiation stage and thereafter IW/CPE 1.2 up to dough stage recorded higher yield attributes viz., number of panicles hill −1 (9.1), number of filled grains panicle −1 (87.9), test weight (15.3 g), grain yield (4462 kg•ha −1), straw yield (5977 kg•ha −1). However, the highest water use efficiency (6.8 kg•ha −1 •mm −1) was recorded in the treatment of IW/CPE 1.0 throughout the crop growth period. Lower yield attributes, yield and water use efficiency were recorded with irrigation scheduling of IW/CPE 0.8 throughout the growth stage. Application of nitrogen at 150 kg•ha −1 in 5 equal splits at 20, 35, 50, 65 and 80 DAS (Days after sowing) recorded higher yield attributes viz., number of panicles hill −1 (9.3), number of filled grains panicle −1 (90.5), test weight (15.4 g), grain yield (4746 kg•ha −1), straw yield (6258 kg•ha −1) and WUE (7.5 kg•ha −1 •mm −1). Application of nitrogen 100 kg•ha −1 in 4 equal splits at 20, 40, 60 and 80 DAS recorded lower yield attributes, yield and water use efficiency. The interaction effect between irrigation scheduling and nitrogen How to cite this paper:

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Performance of direct-seeded rice under various dates of sowing and irrigation regimes in semi-arid region of India

Cited by 20 publications

References 22 publications

Bacteria with Different Assemblages in the Soil Profile Drive the Diverse Nutrient Cycles in the Sugarcane Straw Retention Ecosystem

Bacteria with Different Assemblages in the Soil Profile Drive the Diverse Nutrient Cycles in the Sugarcane Straw Retention Ecosystem

Agronomic Practices to Enhance Nutrient Acquisition, Grain Quality, Resource-Use Efficiency in Direct- Seeded Aerobic Rice in Eastern India

Effect of Varied Irrigation Scheduling with Levels and Times of Nitrogen Application on Yield and Water Use Efficiency of Aerobic Rice

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