Effect of Neem-Oil Coated Prilled Urea With Varying Thickness of Neem-Oil Coating and Nitrogen Rates on Productivity and Nitrogen-Use Efficiency of Lowland Irrigated Rice Under Indo-Gangetic Plains

Kumar, Dinesh; Devakumar, C.; Kumar, Rajesh; Das, Abhijit Kumar; Panneerselvam, P.; Shivay, Yashbir Singh

doi:10.1080/01904167.2010.512053

Cited by 30 publications

(16 citation statements)

References 27 publications

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“…Peng et al (2006) reported the optimum nitrogen rates of 150-250 kg ha -1 in soils of China. Kumar et al (2010) reported most advantageous nitrogen rate of 122 kg ha -1 for Gangetic soil of India. Fageria and Baligar (2001) reported the optimum nitrogen rates of 78-120 kg ha -1 in three consecutive years in Inceptisols of Brazil.…”

Section: Introductionmentioning

confidence: 98%

Rice Response to Nitrogen in Tidal Flooded Non-saline Soil

et al. 2016

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CORRECTION: Due to a number of formatting and layout issues, the PDF of this paper was replaced on 10th October 2016. The page numbers of this article have changed from 62-67 to 65-70. The name of the fifth author has changed from US Naher to UA Naher.Cultivation of modern varieties (MV) of rice in the coastal non-saline soils of the Asian countries is increasing. Nitrogen (N) deficiency is one of the most nutritional disorders for lowland rice production in Bangladesh. N management recommendation for MV rice in the coastal non-saline soils deserves special attention. A field experiment was conducted for consecutive two years aimed to determine the effect of different nitrogen levels on the yield and nitrogen nutrition of MV rice in coastal non-saline soils of Bangladesh. The field experiment involved five nitrogen levels- 50, 100, 150, 200 and 250 kg ha-1 including one N-control in randomized complete block design. The application of 150 kg N ha-1 gave the highest yield of 6.76 t ha-1 in 2009 and 6.49 t ha?1 in 2010, respectively. Total nitrogen uptake at 150 kg N ha-1 showed 112 and 116 kg ha-1 in 2009 and 2010, respectively. Results averaged over two years showed agronomic use efficiency and physiological use efficiency of 22 and 47 kg kg-1 with the application of 150 kg N ha-1. The apparent recovery efficiency of applied nitrogen (150 kg N ha-1) had 44 and 50% in 2009 and 2010, respectively.Bangladesh Rice j. 2015, 19(2): 65-70

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Section: Introductionmentioning

confidence: 98%

Rice Response to Nitrogen in Tidal Flooded Non-saline Soil

et al. 2016

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“…In the same study, the NCU increased rice yield by 10.5% compared to prilled urea. In a previous study, Kumar et al (2010) reported that urea coated with a neem-oil thickness of 1000 mg kg −1 significantly increased rice yield (+29%) and N uptake (+25%) with respect to uncoated urea.…”

Section: Biochemical Control Releasementioning

confidence: 89%

Smart fertilizers: What should we mean and where should we go?

et al. 2021

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Highlights- A smart fertilizer allows to control the rate, timing and duration of nutrients release.- Nanofertilizers are powder or liquid formulations which involve the synthesis, design and use of materials at the nanoscale level.- Composite fertilizers are formulations containing nutrients mixed or coated with one or more materials that exploit synergy among materials.- Bioformulations are fertilizers containing active or dormant microorganisms capable to trigger physiological growth responses in plants.- Limited information is available for smart fertilizers on herbaceous crops in open field conditions. Abstract The current agricultural system faces several challenges, the most important being the ability to feed the increasing world population and mitigate climate change. In this context, the improvement of fertilizers’ agronomic efficiency while reducing their cost and environmental impact is one of the biggest tasks. Available literature shows that many efforts have been made to develop innovative fertilizers defined as "smart fertilizers", for which, different interpretations and definitions have been used. This paper aims to define, classify, and describe the new frontier of the so-called smart fertilizers with a particular focus on field-scale studies on herbaceous species. Most of the analyzed papers associate the "smart" concept to the controlled and/or slow release of nutrients, using both terms as synonymous. Some others broadened the concept, including the controlled release of nutrients to reduce the environmental impact. Based on our critical analysis of the available literature, we conclude that a fertilizer can be considered "smart" whenapplied to the soil, it allows control over the rate, timing, and duration of nutrients release. Our new definition is: ‘Smart fertilizer is any single or composed (sub)nanomaterial, multi-component, and/or bioformulation containing one or more nutrients that, through physical, chemical, and/or biological processes, can adapt the timing of nutrient release to the plant nutrient demand, enhancing the agronomic yields and reducing the environmental impact at sustainable costs when compared to conventional fertilizers’.

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“…Some natural products from neem (Azadirachta indica, A. Juss), karanja (Pongamia glabra, Vent. ), mint (Mentha spicata, Mentha arvensis L.), and mahua (Madhuca longifolia, L.) are reported to inhibit the activity of nitrifiers (Sahrawat and Parmar 1975;Prasad et al 1993;Prasad et al 2002;Saxena et al 1999;Kumar et al 2007Kumar et al , 2010Kumar et al , 2011Sahrawat 1982;Majumdar 2008;Patra and Chand 2009;Opoku et al 2014). Among them, neem-based products like Nimin, Neemex, and Neem Gold-A are commercially available in the Indian market.…”

Section: Heterocyclicmentioning

confidence: 94%

“…Due to the poor shelf life of neem cake, its industrial production did not merit attention (Prasad et al 2002). Neem oil-coated urea (NOCU) on the other hand was found to be more suited (Saxena et al 1999;Kumar et al 2007Kumar et al , 2010Kumar et al , 2011. Its efficacy has been demonstrated at two-fertilizer plants in India, viz., KRIBHCO, Hazira, and Shriram Fertilizers and Chemicals, Kota.…”

Section: Heterocyclicmentioning

confidence: 96%

Nitrification Inhibitors: Classes and Its Use in Nitrification Management

Kumar

Parmar

Walia

et al. 2014

Nutrient Use Efficiency: From Basics to Advances

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The explosive expansion of human activity during the last two centuries through industrial and agricultural pursuits has resulted in massive changes in the nitrogen (N) cycle of the planet. Based on the projected population growth and food demand, the N-fertilizer inputs into agricultural systems need to be doubled in the near future which would lead to further increase in the amount of N lost to the environment. If production agriculture continues to move towards high-nitrification agricultural systems with the expansion and intensification of agricultural activities, there is potential for catastrophic consequences to our planet due to the destruction of the ozone layer, global warming, and eutrophication. It is therefore imperative to manage the nitrification in agricultural systems for minimizing N leaks into the environment which are not only a serious economic and energy drain on society but also potentially have long-term ecological and environmental consequences. Currently, more than 60 % of the total N applied to agricultural systems is lost, amounting to an annual economic loss equivalent to US$17 billion worldwide. Wide substrate range of ammonia monooxygenase (AMO), an important enzyme involved in nitrification, has enabled a range of chemicals or chemical formulations that can be effectively deployed as additives to N fertilizers to regulate nitrification. These chemicals by augmenting the efficiency of N-fertilizer use help us to achieve higher food production for catering the ever increasing population and minimize fertilizer-related pollution of the environment. This paper overviews N transformations in agricultural systems and the salient agrochemicals employed for management of nitrification, the most important transformation, in particular.

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Effect of Neem-Oil Coated Prilled Urea With Varying Thickness of Neem-Oil Coating and Nitrogen Rates on Productivity and Nitrogen-Use Efficiency of Lowland Irrigated Rice Under Indo-Gangetic Plains

Cited by 30 publications

References 27 publications

Rice Response to Nitrogen in Tidal Flooded Non-saline Soil

Rice Response to Nitrogen in Tidal Flooded Non-saline Soil

Smart fertilizers: What should we mean and where should we go?

Nitrification Inhibitors: Classes and Its Use in Nitrification Management

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