Nitrogen and water effects on wheat yield in a Mediterranean-type climate. II. Fertilizer-use efficiency with labelled nitrogen

Garabet, S.; Ryan, John; Wood, M.

doi:10.1016/s0378-4290(98)00096-3

Cited by 59 publications

(24 citation statements)

References 24 publications

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“…Therefore, adequate N inputs are essential to obtain high wheat yield, and it is imperative to develop N management strategies to increase N recovery (RE) of applied N if we are to increase the economic return to the farmer and reduce potential for NO 3 ( leaching or other adverse environmental impacts. Under rainfed conditions, RE at harvest generally ranges from 20 to 80%, depending on factors such as fertilizer type, application time and method, soil type and weather conditions (Garabet et al 1998). Maximum N use efficiency (NUE) should be achieved by the latest possible application compatible with the stage of development that would allow a rapid N uptake (Alcoz et al 1993).…”

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confidence: 99%

Time of nitrogen application affects nitrogen use efficiency of wheat in the humid pampas of Argentina

Barbieri¹,

Rozas²,

Echeverría³

2008

Can. J. Plant Sci.

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. 2008. Time of nitrogen application affects nitrogen use efficiency of wheat in the humid pampas of Argentina. Can. J. Plant Sci. 88: 849Á857. Nitrogen (N) fertilization is an important management practice to increased grain yield; however, it is imperative to increase nitrogen use efficiency (NUE) in order to diminish risks of environmental pollution. The objective of this study was to determine the effect of fertilization times on wheat grain yield, grain N accumulation and grain N recovery efficiency (RE) in different sites and years at the south-eastern wheat belt of the Pampas. The experiments were a factorial combination of N rates and fertilization times (sowing and tillering). Grain yield ranged from 1600 to 7900 kg ha(1 and fertilization at tillering increased grain yield compared with fertilization at sowing (5465 vs. 5110 kg ha(1 ), similar behavior was observed for grain N accumulation (95 vs. 86 kg ha(1 ) and RE (0.41 vs. 0.32). Predicted grain yield by CERES-Wheat model for different N rates and fertilization times was correlated with observed grain yield (r 2 00.71). While fertilization at tillering significantly increased grain yield, CERES-Wheat model estimated nitrate leaching losses that ranged from 12 to 62 kg N ha(1 and from 7 to 16 kg N ha(1 for fertilization at sowing and tillering, respectively. However, denitrification losses ranged from 1.2 to 3.9 and from 0.5 to 2.4 kg N ha (1 for fertilization at sowing and tillering, respectively. Leaching losses for fertilization at sowing are a consequence of water excess early in the growing season and would be the main N loss factor. Therefore, N application at tillering is an appropriate strategy to improve NUE in the south-eastern wheat belt of the Pampas.

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confidence: 99%

Time of nitrogen application affects nitrogen use efficiency of wheat in the humid pampas of Argentina

Barbieri¹,

Rozas²,

Echeverría³

2008

Can. J. Plant Sci.

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“…6.3); a result commonly demonstrated in field experiments (Garabet et al, 1998;Li et al, 2004). The inter-annual variation of wheat yield was larger in the treatment 100 kg N ha -1 compared to 50 kg N ha -1 (Fig.…”

Section: Nitrogen and Water Interaction In Wheatsupporting

confidence: 70%

Simulation of nitrogen release from organic materials in the soybean/wheat cropping systems on Vertisols in central India

Mohanty¹

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The soybean (Glycine max L.)-wheat (Triticum aestivum, L.) cropping system is the dominant cropping system on Vertisols of Madhya Pradesh in central India, but the yield of soybean has been decreased significantly over recent years due to biotic and abiotic factors. The yield of wheat following soybean in this region is also governed by the availability of irrigation water. So managing this cropping system in terms of nutrient and water in Vertisols is important for soybean and wheat production. The proposed research work was undertaken to analyze N release from different organic materials like rice (Oryza sativa, L.) and wheat straw, green manure (like Gliricidia) and farmyard manure (FYM), modeling N release using APSIM (Agricultural Production System Simulator). The APSIM model has been calibrated for first time for Indian FYM, and also tested for the soybeanwheat cropping system permitting prediction of N release from organic amendments varying in C/N ratios and biochemical properties.A laboratory incubation experiment was carried out for 98 days at 30º C under aerobic conditions to study the effects of rice and wheat straw applied at 5 and 10 g kg -1 to a Vertisol soil in the presence or absence of additional N (as urea). The study showed an interactive effect between the rate of application of the residues and additional mineral N.Without additional N, the mineral N in soil was completely immobilised within two weeks, irrespective of the rate of application; initial net immobilisation was limited by the availability of N and was independent of residue rate. When additional N was supplied, initial net immobilisation was dependent on the rate of application of the residue.We used the APSIM SoilN module to simulate N mineralisation from high C/N ratio crop residues, and compared the predictions with the observed data from our incubation study and other published data sets. Model performance was generally satisfactory with a modelling efficiency of 0.82. The major discrepancy between the modelled and the observed data was a tendency for the model to underestimate the initial rate of immobilisation. iii the model based on the FYM composition. Water soluble C and N components were used to specify the conceptual pool FPOOL1 and the measured lignin content to specify the C content of FPOOL3. Using these values and an iterative approach to identifying an Application of

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“…Whitfield and Smith (1992) reported a higher NUE under irrigation than under rainfed conditions. Garabet et al (1998) also found that NUE is increased by higher rainfall and irrigation.…”

Section: Nitrogen Recoverymentioning

confidence: 82%

Nitrogen fertilization and row spacing effects on Digitaria eriantha

Gargano¹,

Adúriz²,

Busso³

2004

REM

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Crude protein (CP, %), yield of protein dry matter (YPDM, kg ha'), nitrogen use efficiency (NUE, kg dry matter kg' N) and nitrogen recovery (NR, %) were evaluated in Digitaria eriantha after exposing this species to various field-treatments during 1998 -1999 and 1999 -2000 in Bahía Blanca (38° 48'S, 62° 13'W), Argentina. Treatments included (1) 3 N fertilization rates (0, 50 or 100 kg ha-'), (2) 2 row spacings (30 or 50 cm), and (3) 2 methods of fertilizer application (either split at the beginning of spring and summer or applied at once in early spring). Plants were cut leaving 5 cm stubble whenever they reached 26-28 cm. Studied parameters were determined on forage harvested in spring, summer or total annual. Crude protein increased (P < 0.05) as N fertilization increased in both seasons. Total annual CP averaged 9.7, 12.0 and 14.0 %, respectively for the 0, 50 and 100 kg ha' fertilization rates, respectively. Crude protein was greater (P < 0.05) on forage which received split rather than bulk N fertilization, and mean values were 13.2 and 11.7 %, respectively. Forage sown at different row spacings had a similar (P > 0.05) CP concentration. In general, YPDM responded positively (P < 0.05) to N fertilization and to a split application of N fertilizer. Although differences were not always significant, there was an inverse relationship between N fertilization rate and NUE and NR. Nitrogen use efficiency was 34.5 and 24.8 kg dry matter kg' N (P < 0.05), and NR was 98 and 79% (P < 0.05) when N fertilization rates were 50 and 100 kg ha', respectively. There was a positive (P < 0.05) relationship between rainfall and NUE or NR. Nitrogen fertilization in D. eriantha should be split with a N fertilization rate close to 50 kg ha', and using 30 rather than 50 cm row spacing.Key Words: N rate and timing, crude protein, N use efficiency, N recovery, semiarid Argentina, perennial grasses Research coming from semiarid environments regarding the effects of N fertilization on forage quality of Digitaria eriantha is scarce. Nitrogen fertilization with 100, 200 or 400 kg ha' did increase crude protein (CP) in this species (Grunow and Rabie 1985). Some studies in Argentina also showed that CP increased in D. eriantha after application of 100 or 127 kg ha' N Terenti 1997, Veneciano et al. 1998). Increases in N or CP percentages as N fertilization rates increase in perennial grasses are common (George et al. 1972, Hanson et al. 1978, Eck et al. 1981, Madakadze et al. 1999).Research was funded by the Universidad Nacional del Sur Manuscript accepted 2 Feb. 2004. ResumenSe efectuaron análisis en el forraje cosechado en un experimento realizado en Bahía Blanca (Argentina) durante los ciclos 1998 -99 y 1999 -00. El ensayo fue en bloques al azar con tres repeticiones. Los tratamientos fueron: 1) dosis de nitrógeno (N): 0, 50 y 100 kg/ha, 2) distancia entre surcos: 30 y 50 cm y 3) sistemas de fertilización: dividida (en mitades al inicio de primavera y de verano) y total (al inicio de primavera). Se efectuaron cortes con fre...

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Nitrogen and water effects on wheat yield in a Mediterranean-type climate. II. Fertilizer-use efficiency with labelled nitrogen

Cited by 59 publications

References 24 publications

Time of nitrogen application affects nitrogen use efficiency of wheat in the humid pampas of Argentina

Time of nitrogen application affects nitrogen use efficiency of wheat in the humid pampas of Argentina

Simulation of nitrogen release from organic materials in the soybean/wheat cropping systems on Vertisols in central India

Nitrogen fertilization and row spacing effects on Digitaria eriantha

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