Improvement of the N fertilizer efficiency with dicyandiamide (dcd) in citrus trees

Serna, M. D.; Legaz, Francisco; Primo‐Millo, Eduardo

doi:10.1007/bf00747693

Cited by 8 publications

(7 citation statements)

References 18 publications

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“…This could increase the amount of NO 3 -accumulated in deeper soil layers, which can not be explored by the root system, and hence lead to potential risk of NO 3 -losses during intensive rainfalls and/or excessive irrigation events. In previous glasshouse and outside container experiments with Citrus, the soil showed higher NH 4 + and lower NO 3 -concentration in different soil layers (0-45 cm) when a NI, DCD or DMPP, was added (Serna et al, 1994(Serna et al, , 1996a. The absence of the NI also originated a higher NO 3 -content in the drainage water (Serna et al, 2000;Bañuls et al, 2001;Martínez-Alcántara et al, 2006).…”

Section: Seasonal Variations Of N Concentrations In Soilmentioning

confidence: 84%

“…Marschner (1995) and Goos et al (1999) also found higher yield and growing rates in crops fed with a mixture nutrition of ammonium and nitrate. Serna et al (1996a) obtained an increase of about 15% in the yield due to an increase in the fruit number in Citrus trees with DCD. Pasda et al (2001) also observed an increase in crop yield of numerous agricultural and horticultural crops fed with ammonium fertilizes with DMPP.…”

Section: Yield and Fruit Qualitymentioning

confidence: 90%

“…Pasda et al (2001) found the highest values in crude protein concentration in cereal grain (winter wheat and grain maize) when the DMPP was added to ASN. In other assays, the addition of DCD to ASN resulted in a significant increase in leaf N concentration (Serna et al, 1994(Serna et al, , 1996a. This could be due to the fact the maintenance of high NH 4 + concentration in the soil treated with DMPP incorporated to NH 4 + fertilizers, enhanced N uptake by plants (Serna et al, 2000;Bañuls et al, 2001;Martínez-Alcántara et al, 2006) as a result of a more continuous NO 3 -release in soil and a reduction of N losses by NO 3 -leaching and denitrification.…”

Section: Nitrogen and Iron Concentration In The Spring Flush-leavesmentioning

confidence: 97%

“…NH 4 + is usually oxidized quite rapidly to NO 3 -by the nitrifying microorganisms in soils (McCarty and Bremner, 1989). The nitrification process can be performed between 30-40 days after N application, but in summer time, when the majority of N fertilizers are applied in citrus orchards, it can be more rapid (Serna et al, 1996a(Serna et al, , 2000. Part of the NO 3 -produced is then subject to losses, mainly through leaching or denitrification, which account for the low N efficiency of the N fertilizers used in this crop (Mansell et al, 1986;Feigenbaum et al, 1987;Martínez et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…In this line, the use of specific nitrification inhibitors may increase the N fertilizer uptake and decrease nitrate leaching. Previous studies demonstrated that the nitrification inhibitor (NI) dicyandiamide (DCD) added to ammonium sulphate nitrate (ASN) improved the N-fertilizer efficiency and reduced NO 3 -leaching in young and mature citrus trees (Serna et al, 1994(Serna et al, , 1996a. More recently, a new NI, 3,4 dimethylpirazole phosphate (DMPP), has been shown to have several distinct advantages compared to the currently used NIs .…”

Section: Introductionmentioning

confidence: 99%

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Improvement of N fertilization by using the nitrification inhibitor DMPP [3,4-dimethylpirazole phosphate] in drip-irrigated citrus trees

Quiñones

Martínez‐Alcántara

Chi-Bacab

et al. 2009

Span. j. agric. res.

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Nitrogen management in orchards should tend to improve the fertilizer N use efficiency for a sustainable agriculture where productivity, fruit quality and environment are reconciled. The use of specific nitrification inhibitors could increase the N fertilizer uptake and decrease the potential groundwater pollution by nitrate leaching. The aim of this experiment was to assess the effect of application frequency of the ammonium sulphate (AS) and the nitrification inhibitor (NI), 3,4-dimethylpirazole phosphate (DMPP) supply on: nitrate-N and ammonium-N seasonal changes in soil; N and Fe concentrations in the spring-flush leaves; and yield and fruit quality. The experiment was carried out with clementine cv. Nules (Citrus clementine Hort. Tanaka x Citrus reticulate Blanco) mandarins grafted on Troyer citrange (Citrus sinensis x Poncirus trifoliata) rootstock under field conditions during three consecutive years. The trees were fertilized with 324 Kg N ha -1 from which 192 Kg N ha -1 were applied as AS (21% NH 4 + -N) either with or without NI, and the remainder N came from irrigation water. The AS and AS+NI were split into 1, 2 or 4 applications per month by drip irrigation. The NH 4 + -N concentration in the 0-20 and 20-40 cm soil layers was significantly higher in the AS+NI treatment. By contrast, the NO 3 --N concentration was significantly higher in the soil treated only with AS. Moreover, the addition of NI to AS originated a significantly higher N and Fe concentrations in the spring-flush leaves. The yield was higher and some fruit quality parameters improved in trees fertilized with AS+NI compared to those fertilized only with AS.Additional key words: ammonium sulphate, fruit quality, fruit yield, N frequency, N soil. ResumenOptimización de la fertilización nitrogenada en cítricos en riego localizado mediante el inhibidor de la nitrificación DMPP Las prácticas agrícolas de fertilización nitrogenada deben mejorar la eficiencia de uso del nitrógeno (N) en una agricultura sostenible en que una mayor producción y calidad sea compatible con el medioambiente. El uso de inhibidores de la nitrificación (NI) podría incrementar la eficiencia de absorción de N disminuyendo la contaminación de las aguas subterráneas por lixiviación de nitratos. Este trabajo analiza el efecto de la frecuencia de aplicación del sulfato amónico (AS) y del inhibidor de la nitrificación 4-dimethylpirazol fosfato (DMPP) sobre los cambios estacionales del N-nítrico y N-amó-nico del suelo, la concentración de N y hierro en hojas de la brotación de primavera y la producción y calidad del fruto. El ensayo se llevó a cabo en una parcela comercial de clementina cv. Nules (Citrus clementine Hort. Tanaka x Citrus reticulata Blanco) injertadas sobre citrange Troyer (Citrus sinensis x Poncirus trifoliata) durante tres años consecutivos. Los árboles se fertilizaron con 324 Kg N ha -1 ; 192 Kg N ha -1 se aplicaron como AS (21% NH 4 + -N) sin y con NI, fraccionados en 1, 2 y 4 aplicaciones por mes, el resto procedió del agua de riego. La concentrac...

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