Yield response of wetland rice to band placement of urea solution in various soils in the tropics

Schnier, H. F.; Datta, S. K. De; Fagi, Achmad M.; Eaqub, M.; Ahmed, Fahim; Tejasarwana, R.; Mazid, Abdul

doi:10.1007/bf00748700

Cited by 12 publications

(5 citation statements)

References 18 publications

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“…In this study, apparent recovery of applied N increased considerably due to deep placement of urea (Table 2). Another instrument called "liquid urea injector" is used to inject dissolved urea into the upper soil layer at 5-6 cm soil depth as band placement between alternate rice rows (Schnier et al 1988(Schnier et al , 1993. This method of N application was found effective in reducing ammonia volatilization loss resulting in increase in grain yield and fertilizer N recovery of the 15 N labeled urea in several field experiments (Schnier 1995;Schnier et al 1990).…”

Section: Deep Placement Of Nitrogen Fertilizers and Use Of Modified Fmentioning

confidence: 96%

Nitrogen Fertilizer Losses from Rice Soils and Control of Environmental Pollution Problems

Choudhury

Kennedy

2005

Communications in Soil Science and Plant Analysis

229

107

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Nitrogen (N) requirements of rice crop are met from both the soil and fertilizers. Because of acute N deficiency in most rice soils, fertilizer N must be applied to meet the crop demand. N fertilizer applied to rice crops is partially lost through different mechanisms, including ammonia volatilization, denitrification, and leaching. These losses may cause environmental problems such as polluting the atmosphere, aquatic systems, and groundwater. These problems cannot be alleviated completely. However, they can be reduced a considerable extent by various techniques. Research has been conducted around the world to minimize N fertilizer losses. This paper reviews this information on N fertilizer losses, indicating management practices for minimizing these losses from the soil-water system.

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Section: Deep Placement Of Nitrogen Fertilizers and Use Of Modified Fmentioning

confidence: 96%

Nitrogen Fertilizer Losses from Rice Soils and Control of Environmental Pollution Problems

Choudhury

Kennedy

2005

Communications in Soil Science and Plant Analysis

229

107

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“…The buildup of ammoniacal N in fl oodwater can be reduced by more eff ective incorporation and placement of fertilizer N into puddled soils Schnier et al, 1990Schnier et al, , 1993Devasenapathy and Palaniappan, 1996), application of fertilizer N immediately before rather than aft er permanent fl ooding in nonpuddled soils (Bacon et al, 1988;Humphreys et al, 1992), controlled release fertilizers (Oertli, 1980), and urease inhibitors (Buresh et al, 1988a(Buresh et al, , 1988bByrnes and Amberger, 1989;Freney, 1997). The application of fertilizer N immediately before rather than 14 d before permanent fl ooding reduces NH 3 loss during production of dry-seeded rice on nonpuddled soils (Griggs et al, 2007).…”

Section: Ammonia Volatilizationmentioning

confidence: 99%

“…Much eff ort has been devoted to developing techniques to facilitate deep placement. These techniques included use of a "mud ball" containing urea with soil (De Datt a et al, 1968), large granules of urea (Pasandaran et al, 1999), injection of granular urea (Scholten, 1992), and injection of liquid urea (Schnier et al, 1993). The increased labor and cost associated with placement of fertilizer N into soil has been a constraint to its adoption in the Tropics (Mohanty et al, 1999), although localized adoption of the production and deep placement of urea briquett es for rice is taking place in Bangladesh (Bowen et al, 2005).…”

Section: Nitrogen Management In Submerged Soils Nitrogen Fertilizer Mmentioning

confidence: 99%

Nitrogen Transformations in Submerged Soils

Buresh

Reddy

Kessel

2015

Agronomy Monographs

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Soils with continuous or intermitt ent submergence by water are widely distributed worldwide. They occur in a range of ecosystems including rice (Oryza sativa L.) fi elds, wetlands, estuaries, and fl oodplains. Such ecosystems oft en occur at low elevation in the landscape and are poorly drained with high retention of water. In addition, some upland areas with poor drainage can undergo periodic submergence and soil saturation. Moreover, the sediments in ocean, lake, and stream bottoms have similar biogeochemical and physical characteristics and N transformations as submerged agricultural soils.Rice fi elds surrounded by earthen levees to retain rain and irrigation water and ensure soil submergence are one of the world's major agricultural ecosystems. Rice is a staple food for nearly half the world's population, and about 95% of the global rice production occurs on fi elds with soil submerged during at least part of the rice-cropping period. The sustained productivity of this rice ecosystem, which ensures production of suffi cient food for a growing world population, relies heavily on the input and management of N.Nitrogen transformations in submerged soils are markedly diff erent from those in drained, aerated soils. These diff erences aff ect the prevalent soil microorganisms and microbial activities and the turnover, availabilility, and losses of N. To deal with the diff erences in N transformations between submerged and drained soils it is necessary to understand the biogeochemical conditions existing in submerged soils. This chapter is an update of an earlier review by Patrick (1982).

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“…An instrument called a liquid urea injector has been used to inject dissolved urea at a 5-6 cm soil depth (Schnier et al 1993). These techniques are effective for improving NUE in rice but are costly to farmers.…”

Section: Downloaded By [Ecu Libraries] At 03:29 19 September 2015mentioning

confidence: 99%

NPK Accumulation and Use Efficiencies of Manawthukha Rice (Oryza sativaL.) Affected By Pretransplant Basal and Split Applications of Nitrogen

Moe

Yamakawa

Thu

et al. 2015

Communications in Soil Science and Plant Analysis

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We investigated the effects of split applications of nitrogen (N) on nitrogen, phosphorus and potassium (NPK) uptake and use efficiency of rice under basal surface-application and incorporation methods. Different amounts of N were applied at the basal, tillering, and panicle initiation stages in five N split treatments. Basal incorporation provided higher NPK uptake than basal surface application until initiation of the panicle. In basal surface application, N2(25:50:25) resulted in the highest total NPK uptake, use efficiency, and N recovery efficiency. In basal incorporation, N1 (50:25:25) resulted in higher values for all parameters. The N5 (50:0:50), which included omitting N at tillering, resulted in low N recovery efficiency and uptake, both under basal incorporation and basal surface application. These results emphasize that split Downloaded by [ECU Libraries] at 03:29 19 September 2015A c c e p t e d M a n u s c r i p t 2 applications of N influence N recovery efficiency and total NPK uptake and use efficiency of rice.

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Yield response of wetland rice to band placement of urea solution in various soils in the tropics

Cited by 12 publications

References 18 publications

Nitrogen Fertilizer Losses from Rice Soils and Control of Environmental Pollution Problems

Nitrogen Fertilizer Losses from Rice Soils and Control of Environmental Pollution Problems

Nitrogen Transformations in Submerged Soils

NPK Accumulation and Use Efficiencies of Manawthukha Rice (Oryza sativaL.) Affected By Pretransplant Basal and Split Applications of Nitrogen

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