Nitrogen‐use efficiency of young citrus trees as influenced by the timing of fertilizer application

Martínez‐Alcántara, Belén; Quiñones, Ana; Legaz, Francisco; Primo‐Millo, Eduardo

doi:10.1002/jpln.201100223

Cited by 31 publications

(31 citation statements)

References 42 publications

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“…According to these data, average daily uptake rate of N significantly increased as the cycle progressed, reaching its highest value during the fruit growth period (86.6 mg N day -1 ). These results are in line with previous studies which show that citrus trees take up proportionately more N during summer months (Kubota et al, 1976a(Kubota et al, & 1976bLegaz et al, 1995;Martínez-Alcántara et al, 2012).…”

Section: Methodssupporting

confidence: 92%

“…These results corroborate previous findings on the higher NUE when fertilizer was supplied on June (61%; Kubota et al, 1976b) if compared to earlier application on March (25%; Kubota et al, 1976a). In this sense Martínez-Alcántara et al (2012) also obtained higher NUE in summer, when compared to times of the year when trees are not actively growing.…”

Section: Fertilizer N Uptake Efficiency: Seasonal Variationmentioning

confidence: 73%

“…Weinbaum et al (2001) suggested that the sequential excavation of trees coupled with biomass determinations and nutrient analysis is the only method that can reliably indicate the seasonal patterns of tree nutrient uptake. In previous studies N uptake and distribution patterns in young containerized citrus has been evaluated at different stages of the growing season (Legaz et al, 1982;Martínez-Alcántara et al, 2012;Quiñones et al, 2011). In these trees, seasonal variations in N uptake occur, with the uptake appearing to be highest during periods of active shoot growth (Maust & Williamson, 1994;Menino et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal Changes in Nitrate Uptake Efficiency in Young Potted Citrus Trees

Martínez‐Alcántara¹,

Quiñones²,

Primo‐Millo³

et al. 2012

JAS

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Fertilizer isotope labelling ( 15 N) of young Lane Late potted orange trees with differential N rates at three phenological periods (end of flowering, fruit set and fruit growth) was used to determine patterns of N uptake response and N efficiency (NUE) along the growing cycle. In a first experiment trees were fed with a saturating N solution in order to determine seasonal variations in N requirements. The second experiment tested four N rates which were equal to (N 1 ), two (N 2 ), three (N 3 ) and four-fold (N 4 ) the N requirements at each period. Increasing N rate diminished NUE being the decrease more acute at flowering as a consequence of the lower response in N uptake to increased N supply in this period. Theoretical NUE corresponding to a fertilizer rate that fulfills plant requirements in each period was calculated, being highest at the end of fruit set period (72%), which contrasted with the value obtained for flowering (28%), when potential nitrogen leaching reached therefore its maximum (71%).

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Section: Methodssupporting

confidence: 92%

Section: Fertilizer N Uptake Efficiency: Seasonal Variationmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

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Seasonal Changes in Nitrate Uptake Efficiency in Young Potted Citrus Trees

Martínez‐Alcántara¹,

Quiñones²,

Primo‐Millo³

et al. 2012

JAS

Self Cite

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“…With AS and CPN fertilization, fertilizer-N was mainly allocated in aboveground organs, which is in accordance with previous reports (Feigenbaum et al, 1987;Quiñones et al, 2005;Martínez-Alcántara et al, 2012a). The AS+DMPP treatment showed the opposite pattern of greater allocation of N to below ground organs.…”

Section: N Uptake In Plant Tissuessupporting

confidence: 81%

“…Climatic conditions in citrus production zones and traditional cultivation methods favour nitrification of ammonium and, consequently, nitrate-N loss by leaching (Bergström & Brink, 1986). Research conducted in the last years has led to a significant increase in knowledge for improving citrus trees nutrient efficiency where NUE is influenced by N rate (Feigenbaum et al, 1987;Lea-Cox & Syvertsen, 1996;Lea-Cox et al, 2001;Syvertsen & Smith 1996), timing of application (Kubota et al, 1976a & b;Kato & Kubota, 1982;Martínez-Alcántara et al, 2012a;Quiñones et al, 2003Quiñones et al, , 2012, water management (Alva et al, 1998Quiñones et al, 2007), the form of N applied (Cantarella et al, 2003;Mattos et al, 2003), fertilizer splitting (Alva et al, 1998;Morgan et al, 2009;Quiñones et al, 2003), soil type (Martínez et al, 2002;Quiñones et al, 2012) and tree phenological growth stage (Martínez-Alcántara et al, 2012b). A greater synchrony between crop demand and nutrient supply becomes a key factor in NUE improvement.…”

Section: Introductionmentioning

confidence: 99%

Use of Nitrification Inhibitor DMPP to Improve Nitrogen Uptake Efficiency in Citrus Trees

Martínez‐Alcántara¹,

Quiñones²,

Polo³

et al. 2013

JAS

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In citrus orchards, nitrogen uptake efficiency (NUE) is between 40 to 60% where any excess of nitrate is subjected to leaching below the rooting zone. The compound, 3,4-dimethylpyrazole phosphate (DMPP) inhibits the nitrification process in soil thus reducing/delaying nitrate leaching. The objective of this study was to evaluate the performance of DMPP added to ammonium sulphate (AS+DMPP), compared to ammonium sulphate (AS) and calcium-potassium nitrate (CPN), in fertigation of bearing orange trees grown outdoors in drainage lysimeters. Fertilizers were 15 N-labeled to trace N through soil-plant-drainage system. Soil was sampled monthly from April to December and trees were destructively harvested in December. In trees fertilized with AS+DMPP, increased biomass was observed with a more profuse development of root system and higher fruit yield. Fertilizer 15 N uptake significantly increased with DMPP addition. In AS+DMPP amended soils, increased values of NH -15 N and lower NO -N concentrations were recorded from April to June as evidence of the inhibitory effect of DMPP on the nitrification process during this period. In CPN and AS fertilized soils, 15 N losses in drainage solutions represented 9-10% of the fertilizer supplied whereas less than 3% was leached when DMPP was added. At the end of the cycle, highest NUE was recorded in the AS+DMPP treatment (69%), while CPN and AS had lower values (61% and 54%, respectively). Therefore, the use of DMPP enables a more efficient utilization of the fertilizer-N in citrus trees, minimizing the risk of nitrate-N pollution in groundwater. However, DMPP supply should be considered during spring fertilization, since high temperatures of summer months significantly reduced its activity.

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Biological soil crusts enhance moisture and nutrients in the upper rooting zone of sandy soil agroecosystems

Nevins

Strauss

Inglett

2020

J. Plant Nutr. Soil Sci.

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Background: Biological soil crusts (biocrusts) are commonly found in arid ecosystems and are known to have increased carbon (C) and nitrogen (N) concentrations compared to non‐crusted soil. Similar biocrusts were recently identified in Florida, USA sandy soil agroecosystems where they could impact soil biogeochemical cycling, particularly of C and N, in the crop rooting zone.Aims: Therefore, this research assessed the impacts of biocrusts on soil moisture, available and microbial C and N concentrations, and soil stable N isotopic ratios (δ15N) in the upper rooting zone (0–15 cm) below biocrusts compared to nearby control bare soils without biocrusts.Methods: Intact soil cores (0–15 cm) were collected from crusted and non‐crusted (control) locations in three sandy soil, citrus agroecosystems. Soil cores were partitioned into three depths: a surface (0–1 cm), a middle (1–5 cm), and a subsurface depth (5–15 cm), and were analyzed for soil moisture and multiple C and N cycling pools.Results: Biocrust presence and sampling depth (0–1 cm, 1–5 cm, and 5–15 cm) had significant impacts on soil physical, chemical, and biological parameters at the sites. All sites had increased bulk total C and total N, soluble (ammonium, nitrate, dissolved organic N, and salt extractable C), and microbial (microbial biomass C/N) C and N concentrations in the biocrust surface depth compared to the control without biocrusts. Nitrate and total inorganic N (ammonium + nitrate) were enriched below biocrusts (1–5 cm) with one site having 96% and 71% more nitrate and total inorganic N, respectively, under biocrusts compared to controls. This additional plant‐available N was likely provided by the biocrust, as indicated by the δ15N. Further, the soil below biocrusts (1–5 cm) at one agroecosystem had 44% more microbial biomass C and a significantly lower MBC:MBN than soil without biocrusts.Conclusions: Overall, results illustrate these naturally occurring biocrusts have the potential to benefit agroecosystems by enriching soil C and N in the crop rooting zone, indicating the potential for biocrusts to effect overall soil quality and health.

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Nitrogen‐use efficiency of young citrus trees as influenced by the timing of fertilizer application

Cited by 31 publications

References 42 publications

Seasonal Changes in Nitrate Uptake Efficiency in Young Potted Citrus Trees

Seasonal Changes in Nitrate Uptake Efficiency in Young Potted Citrus Trees

Use of Nitrification Inhibitor DMPP to Improve Nitrogen Uptake Efficiency in Citrus Trees

Biological soil crusts enhance moisture and nutrients in the upper rooting zone of sandy soil agroecosystems

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