Efficiency of nitrogen fertilizer applied at corn sowing in contrasting growing seasons in Paraguay

Amado, Telmo Jorge Carneiro; Villalba, Enrique Oswin Hahn; Bortolotto, Rafael Pivotto; Santi, Antônio Luis; León, Enrique Asterio Benítez; Menefee, Dorothy; Kunz, Junior

doi:10.1590/s0100-06832013000600020

Cited by 8 publications

(7 citation statements)

References 35 publications

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“…In the municipality of Rio Verde, in the state of Goiás, Brazil, Simão et al (2018) found an average yield of 6.7 Mg ha -1 grains with 50 kg ha -1 N applied as topdressing, at the V3 phenological stage, over two years and two sowing times; the starter fertilizer varied from 0 to 50 kg ha -1 N. Studies in the region of Rio Paranaíba, in the state of Minas Gerais, also Brazil, showed that rates between 19 and 150 kg ha -1 N promoted yields of 3.5 to 7.6 Mg ha -1 (Gott et al, 2014;Sichocki et al, 2014). The limited response to N is usually due to the influence of climate, since drought reduces the yield potential and nutrient recovery efficiency of a crop, causing the additional amounts of N fertilizer to have a negligible effect on grain yield (Amado et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen fertilization in off-season corn crop in different Brazilian Cerrado environments

Simão

Resende

Neto

et al. 2020

Pesq. agropec. bras.

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The objective of this work was to assess the grain yield and the economic response of off-season corn (Zea mays) crop subjected to different combinations of starter and topdressing nitrogen fertilization, in the Brazilian Cerrado region. The experiment was carried out in a randomized complete block design in a 3×4 factorial arrangement (0, 45, and 90 kg ha-1 N at sowing and 0, 22.5, 45, and 90 kg ha-1 N in topdressing as urea), in six environments, combining three sites and two sowing times. Grain yield was determined, and the response to total N applied as starter and topdressing was used to obtain a general model of the average trend of the technical and economic return of fertilization. The corn crop response varied according to the environment, and the observed yields were high. The application of N as a starter fertilizer increased corn yield and improved the effect of topdressing fertilization or even made it unnecessary. Fertilization with 90 kg ha-1 N as urea promotes greater yield and economic return and improves N balance in the soybean/off-season corn crop system.

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Section: Introductionmentioning

confidence: 99%

Nitrogen fertilization in off-season corn crop in different Brazilian Cerrado environments

Simão

Resende

Neto

et al. 2020

Pesq. agropec. bras.

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“…The soil of the experimental area probably supplies similar amounts of nitrogen to the plants, regardless of the time of nitrogen fertilization and the manner of splitting applications. Situations of low crop response to nitrogen application indicate that the major factor limiting high yield is not N availability (Amado et al, 2013). The average yields above 7 Mg ha -1 of the control treatment without N support this hypothesis (Table 2).…”

Section: P30f53yhmentioning

confidence: 82%

Timing and Splitting of Nitrogen Side-Dress Fertilization of Early Corn Hybrids for High Grain Yield

Panison

Sangoi

Durli

et al. 2019

Rev. Bras. Ciênc. Solo

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Currently, most nitrogen fertilizer is side-dressed when corn is in the four (V4) to eight (V8) expanded leaf stage. However, recent studies have shown that modern hybrids take up high amounts of nitrogen during grain filling. This indicates that a late nitrogen fertilization, at the time of crop flowering, may be important to optimize corn agronomic performance. This study aimed to evaluate the effect of the timing and splitting of nitrogen side-dress application on the agronomic performance of early corn hybrids in order to achieve high grain yield. The experiment was set in Lages, Santa Catarina, in the South of Brazil, during the 2014/2015 and 2015/2016 growing seasons. A randomized block design arranged in split plots was used. Two hybrids were tested in the main plots: P1680YH (very early) and P30F53YH (early). Six nitrogen side-dress systems were assessed in the split plots: control (without N), full N rate applied at V5, full N rate applied at V10, 1/2 N rate applied at V5 and 1/2 at V10, 1/3 N rate applied at V5, 1/3 at V10 and 1/3 at VT; and the whole N rate applied at VT. The nitrogen rate was 300 kg ha-1 N. Urea was used as the nitrogen source. Total grain yield and yield components, agronomic nitrogen use efficiency, and leaf area were determined. Grain yield ranged from 6,422 to 15,426 kg ha-1 in 2014/2015 and from 9,283 to 14,986 in 2015/2016. Nitrogen sidedress application performed one time at V5 or V10 or split into two or three applications at different growth stages had similar grain yield, number of ears per plant, kernels per ear, and 1,000 grain dry weight. Nitrogen side-dressed entirely at VT led to higher grain yield than the control. However, grain yield and agronomic nitrogen use efficiency were lower in this treatment than in the treatments involving the other growth stages of side-dress nitrogen. The early hybrid was higher yielding than the very early hybrid, regardless of the timing of nitrogen fertilization. Splitting of nitrogen fertilization up to tasseling was not an effective strategy to increase grain yield and agronomic nitrogen use efficiency of the corn hybrids P30F53YH and P1680YH.

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“…Corn (Zea mays L.) and wheat (Triticum aestivum L.) are the second and fifth grain crops most produced in Brazil, respectively (CONAB, 2020). Yield of these crops is highly dependent on the level of technology used and nitrogen (N) plant uptake (Raun et al, 2011) with a complex interaction with soil health (Wingeyer et al, 2015) and regular distribution of rainfall during critical phenological stages (Amado et al, 2013). To reach high yields, corn and wheat need a large amount of N that soils generally are not capable of supplying in terms of time and quantities required (Cassman et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Hairy vetch role to mitigate crop yield gap in different yield environments at field level

Pes

Amado

Gebert

et al. 2022

Sci. agric. (Piracicaba, Braz.)

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The spatial variability of soil organic matter, plant water availability, and soil nitrogen (N) availability are drivers of crop response to mineral N fertilizer. The complex interaction of these factors is responsible for within-field corn and wheat yield variability. The hairy vetch (HV) cover crop is an economic, environmentally friendly, and efficient N source capable of conciliating crop yield and soil health. Nevertheless, the HV effects to mitigate yield gap of management zone (MZ) have not yet been documented. This study evaluated the effects of HV and mineral N fertilization, in single or combined input, on alleviating crop yield gap. The study was carried out in two croplands southern Brazil. The experimental design was a complete randomized block in a split plot having MZ (high, medium, and low yield) and N fertilizer rates.Wheat and corn N uptake and grain yield had a quadratic adjustment with N fertilizer input, but there was a significant MZ effect, where low yield zone (LYZ) was less responsive. Consequently, mineral N fertilization as a single input to mitigate the yield gap in this MZ was not efficient. On the other hand, HV increased corn N uptake and grain yield mainly in LYZ compared to MYZ and HYZ. HV fully mitigated the yield gap between MYZ and HYZ. The combined use of HV and mineral N fertilization rate adjusted according to N legume credit and MZ was an efficient strategy to boost yield, favoring soil health and environmental protection.

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Efficiency of nitrogen fertilizer applied at corn sowing in contrasting growing seasons in Paraguay

Cited by 8 publications

References 35 publications

Nitrogen fertilization in off-season corn crop in different Brazilian Cerrado environments

Nitrogen fertilization in off-season corn crop in different Brazilian Cerrado environments

Timing and Splitting of Nitrogen Side-Dress Fertilization of Early Corn Hybrids for High Grain Yield

Hairy vetch role to mitigate crop yield gap in different yield environments at field level

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