Influence Of Nitrogen Fertilization Research Articles

Influence of variety and nitrogen fertilizer on productivity and trait association of malting barley

Poor soil fertility is a major constraint to crop productivity in the highlands of Ethiopia. This study was conducted to evaluate the effects of nitrogen (N) fertilization, variety and growing season on grain yield and yield related traits, and determine relationships among agronomic traits of malting barley. The treatments studied were five N levels (0, 23, 46, 69 and 92 kg ha−1) and two malting barley varieties (Miscal-21 and Holker) over three growing seasons (2012, 2013 and 2014) at Bekoji, south eastern Ethiopia. The results revealed that as N rates increased, grain yield, number of tillers and spikes per square meter, biomass yield at harvest, days to physiological maturity, spike length and number of kernels per spike increased, but harvest index decreased. Grain yield, harvest index, number of tillers and spikes per square meter, spike length and biomass yield at harvest were greater in Miscal-21, whilst days to maturity and number of kernels per spike were greater in Holker. Grain yield, harvest index, number of tillers and spikes per square meter, spike length, biomass yield at harvest and days to maturity were significantly affected by seasonal conditions, but spike length and kernels per spike were not affected. Grain yield was positively influenced by the number of tillers per square meter, biomass yield at harvest, spikes per square meter, spike length, kernels per spike and harvest index. However, the number of tillers per square meter followed by biomass yield and spikes per square meter largely determined grain yield. The results of the current study suggest that genetic improvement of those yield related traits is the likely basis of increasing grain yield in barley.

Influence of Nitrogen Fertilization on the Yields and Grain Quality of Winter Wheat under Different Environmental Conditions

Influence of Nitrogen Fertilization on the Yields and Grain Quality of Winter Wheat under Different Environmental Conditions

Influence of Nitrogen Fertilization, Its Time of Application and Intra -Row Spacing on Growth Performance of Extra Early Maize in the Sudan Savanna, Nigeria

A field experiment was conducted during the 2016 and 2017 dry seasons at Institute for Agricultural Research Farm Kadawa and Zobe Irrigation Fields at to study the influence of intra-row spacing, nitrogen fertilizer and time of its application on the performance of extra early maize. The treatments tested consisted of factorial combinations of three levels of nitrogen (0, 60, and 120 kg/ha), three intra row spacing (15 cm, 25 cm, and 35 cm) and three different times of fertilizer application (at planting+4WAS, 2WAS+4WAS and 2WAS+4WAS+6WAS). The treatments were laid in a split-plot design in four replications with the combination of nitrogen levels and its times of application assigned to the main plot, while intra row spacing assigned to sub-plot. The results of the investigation showed that 25 cm and 35 cm intra row spacing produced the tallest plants, higher number of leaves per plant and number of grains per row at Dutsinma. At Kadawa most of the parameters showed no significant effect on intra row spacing. Nitrogen fertilizer at 120 kg/ha resulted in higher values of growth parameters at both locations. Time of fertilizer application affected growth performance such as plant height, number of leaves per plant and number of days to tasseling and silking at both locations.

English

Corn is a crop of high productive potential, but to achieve this, it is essential to apply production technologies, especially fertilizers with a high level of nitrogen. The objective of this work was to evaluate the influence of nitrogen fertilizer in different phenological stages on corn production. The experiment was installed in the experimental plot of the Facultad de Ciencias Agrarias, Universidad Nacional de Concepción, Concepción Department, Paraguay. The experimental design was randomized blocks, with 5 treatments and 4 repetitions. The treatments consisted of the application of nitrogenous fertilizer in the phenological stages V0, V3, V5, V7 and V9. Number of leaves on and below the spike, number of seed lines per spike, plant height, spike height and yield were evaluated. The obtained data was subjected to the analysis of variance by Fisher's test at 5%, when significant differences was detected, it was proceeded to compare the means obtained by the effect of the treatments using the Tukey test at 5% of significance. The results indicate that the application of nitrogen in different phenological stages of corn cultivation influenced the height of the plant, height of insertion of the spike and yield; not so, for: number of leaves above and below the spike and number of seed lines per spike. It is concluded that the application of nitrogen in different phenological stages of corn, has influence on productive characteristics of the crop. It was recommended that  it should be done in phenological stage V5, to achieve maximum efficiency. Key words: Zea mays L., phenological stages, nitrogen, fertilization. &nbsp

The long-term effect of legumes as forecrops on the productivity of rotation (winter rape-winter wheat-winter wheat) with nitrogen fertilization

A field experiment was carried out in the years 2012–2018 in Poland in a split-plot design. The aim of the study was to determine the long-term effect of legumes as forecrops on the productivity of rotation with nitrogen fertilization. The rotation included: legumes + spring barley (SB), winter rape (WR), winter wheat (WW) and winter wheat. The study was conducted as a two-factorial field experiment with four replications. The present study showed that legumes as forecrops increased the yield of all after-harvest crops in rotation. Yielding of these crops also depended on nitrogen fertilization and position in the rotation. After comparison of the influence of nitrogen fertilization on yield of cereals, it was observed that the effect of this factor was greater for WW cultivated in the fourth year of rotation than for WW cultivated in the third year of rotation. In relation with control, each dose of nitrogen fertilization caused a significant increase of WR and cereals yield, but the dose of 180 kg N/ha did not increase yield significantly in comparison to the dose of 120 kg N/ha. There was also negative agronomic N-efficiency observed between doses of 120–180 kg N/ha, which means that it is not necessary to use 180 kg N/ha, especially if there are legumes in crop rotation.

NITROGENATED FERTILIZATION FAVORS VEGETATIVE RESCUE AND PROPAGATION OF Ilex paraguariensis

The vegetative growth of plants depends on the nutritional conditions of the soil, mainly in relation to the N element. This element favours the formation of cytokines and auxins, essential hormones for sprouting and rooting, respectively. The objective of this study was to evaluate the influence of nitrogen fertilization of Ilex paraguariensis mother trees on epicormic sprouts emission and rooting of its cuttings. Five treatments of fertilization were applied on the mother trees: control; 250 g of urea (N); 250 g of NPK (5-20-10); 500 g of NPK, and; 250 g of NPK with 30 g of micronutrients. Two evaluations (at 240 and 480 days) were carried out for: trees with sprouts emission (%), average sprouts number and their average length (cm). Sprouts were collected at both vegetative evaluations after the application of the experiment (August 2016) and sectioned into cuttings. Cuttings variables were evaluated: survival (%); rooting (%), callus formation (%) and average root number. The best response to epicormic sprouts emission was obtained with 250 g of NPK at 480 days for trees with sprouts (>75%), sprouts number (4.4) and sprouts length (9.9), but considerable results were also obtained at 240 days with urea. For cuttings, the best results were also obtained from sprouts obtained at 480 days for most treatments (>80% survival and rooting). Nitrogen fertilization is essential for a successful vegetative rescue and propagation by cuttings of I. paraguariensis, and longer periods may be able to boost these results.

Influence of edaphic conditions and nitrogen fertilizers on cadmium and zinc phytoextraction efficiency of Noccaea caerulescens

The success of cadmium phytoextraction operations with Noccaea caerulescens varies by a factor of 70 between sites of trials. However, soil factors driving the efficiency of cadmium (Cd) and zinc (Zn) phytoextraction are still poorly understood, as are the effects of nitrogen fertilizers. We studied biomass production and Cd and Zn uptake by two contrasting populations of N. caerulescens, Ganges (metallicolous) and Wilwerwiltz (non-metallicolous) grown in pots on a range of 24 field contaminated soils for 20 weeks. The addition of KNO3 and NH4NO3 fertilizers was also tested. Using model averaging of multiple regression models, we show that the major drivers of N. caerulescens growth are physical soil factors such as organic matter and soil bulk density while trace metal accumulation mainly relies on soil Cd and Zn exchangeable concentrations. We confirm the negative effect of soil copper (Cu) on growth, even at exchangeable concentrations below 30 mg kg−1, and therefore on uptake efficiency, while increasing soil lead (Pb) content was related to increased biomass probably due to a protective effect against soil pathogens. Finally, there is a small positive effect of nitrogen fertilization on biomass production only in soils with low initial nitrogen content (under 25 μg g−1 NO3−), while above this value, the positive impact of initial nitrogen content is offset by lower shoot Cd and Zn concentrations. Our data bring substantial information regarding the physico-chemical properties to ensure N. caerulescens growth: a soil bulk density under 1.05 kg/dm3, organic matter above 7% and pH under 7.5. We show that phytoextraction efficiency is maximal for moderate soil contamination in Cd (2–10 mg kg−1) and Zn (300–1000 mg kg−1).

Diurnal ingestive behaviour of steers grazing Alexander grass with various levels of nitrogen and feed supplements

Given the increasing availability of new cultivars with high yield potential, the use of annual tropical forages to improve cattle production systems is increasing and therefore warrants more research. The objective of this study was to quantify the influence of feed supplementation and nitrogen fertilization on the diurnal ingestive behaviour of crossbred steers (zebu x taurine), maintained on a pasture of Alexander grass ( Urochloa plantaginea ). The treatments included the application of nitrogen fertilizer at 100 kg/ha; at 100 kg/ha + supplemented feed of wheat bran (0.5% of bodyweight); and at 200 kg/ha. The study used a completely randomized design with three replications. The paddock size was 0.7 ha. Data were analysed by fitting mixed models. The times spent resting, ruminating and consuming water were not different among treatments. However, time spent grazing significantly differed. On average, steers given supplemented feed spent less time grazing (297 min/day) than steers without the supplemented feed (345 min/day). Steers in the pasture with supplementation showed a significantly greater number of daytime bites (2029 bites) than steers in the 200 kg nitrogen treatment (1715 bites). Supplementation reduced grazing time without altering other behaviour variables. The number of daily bites was lower on the pasture with the higher nitrogen level. Keywords: Feeding time, grazing, idle, nitrogen fertilization, rumination

Influence of Slow Release Nitrogen Fertilizer on Soil Enzymes, Yield and Nutrient Uptake of Maize Grown on Inceptisol

Influence of Slow Release Nitrogen Fertilizer on Soil Enzymes, Yield and Nutrient Uptake of Maize Grown on Inceptisol

Genotype and Nitrogen Fertilization Influence on the Grain Protein Content in Some Barley Varieties and Lines

Grain protein content (GPC) is the main quality trait of barley (Hordeum vulgare L.) because this parameter is a decisive component of seed quality for malt industry. Reaching the level of protein concentration required by the raw industry is very difficult, due to the negative correlation with the yield level. Seventeen winter barley genotypes (varieties and breeding lines), created at NARDI Fundulea during 2003-2017, known as having different grain protein contents, were tested with and without nitrogen fertilization in yield trials at NARDI Fundulea in 2014, 2015 and 2016. Weather conditions during the testing period was reflected by the variation of average yield of the trial from 3861 to 7722 kg/ha (unfertilized) and 4748 kg/ha to 9492 kg/ha (fertilized) and of the average grain protein content from 9.6% to 14.8% (unfertilized) and 10.3% to 15.4% (fertilized). Correlation between grain protein content and yield was significantly negative under unfertilized condition in two years (2014 and 2016) and under nitrogen fertilization in 2016 only. The genotypes with higher GPC in the grains and low yield under nitrogen fertilization are not adequate for use in breeding for improved protein content. Positive and negative deviations from the regression of grain protein content on grain yield were found, several varieties and lines combining high yields and high grain protein content and few varieties and lines combining high yields and low grain protein content. Differences between protein contents with and without nitrogen fertilization were smaller in some varieties and new lines and also presented negative deviations. The information obtained in this study might be useful in breeding new varieties combining low grain protein content and high grain yield.

The effects of N fertilization on soybean (Glycine max L. Merrill) yield and quality under different drought stress levels

As a result to continuous exploitation in agriculture, soil nutrients decrease, and one way of re-fertilizing is by mineral fertilization. However, applying mineral fertilizers should be controlled and pre-evaluated in terms of quantity to be added, as the excessive amounts could negatively affect both plants and soil. Fertilization is very important under abiotic stress conditions, like drought stress which has negative effects on both quantity (yield) and quality (seed content) of crops, especially drought-sensitive crops such as soybean; it is a very important legume with high content of both protein and oil. In order to study the influence of both nitrogen fertilization and drought stress on the yield and the seed quality of two soybean cultivars, an experiment was conducted in Debrecen, Hungary in 2017. Three N fertilization rates; 0, 35 and 105 kg ha-1 were applied under three irrigation regimes; severe drought (SD), moderate drought (MD) and no drought (ND). The results showed drought stress to negatively affect the yield of both cultivars by different extents; it also manipulated both protein and oil concentrations. (N) fertilization could enhance the yield of (MD) and (ND), but not (SD) treatment when applied in a relatively-low rate, whereas it negatively affected the yield when high rate was applied to (ND) treatment. The protein concentration increased as the (N) fertilization rate increased, whereas the oil concentration was not affected by (N) fertilization, but rather by drought. It was concluded that the high-rate application of nitrogen is not always recommended for soybean, especially when water is available for plants. (N) fertilization has a noticeable effect on the protein but not on the oil concentration. Further studies on the best N rate when drought stress is applied at certain growth-stage will help to better understand the combined effects of both traits on soybean yield and quality.

The Effect of Genotype, Climatic Conditions and Nitrogen Fertilization on Yield and Grain Protein Content of Spring Wheat (Triticum aestivum L.)

Cultivation of spring wheat varieties has expanded into areas with abundant winters where winter wheat is not suitable. Due to lack of research in Romania regarding the influence of different factors on hard red spring wheat, the present study aimed at a better understanding of the influence of genotype, climatic conditions and nitrogen fertilization on the spring wheat yield and quality, and to analyse the correlations between grain yield and grain protein content. Experiences were conducted from 2015 to 2018 on two levels of N fertilization (50 and 100 kg ha-1) at Agricultural Research and Development Station Turda. Biological material consisted of 19 genotypes, four of local origin and fifteen of foreign origin, from three different varieties (ferrugineum, lutescens, erythrospermum). The results indicate that the three experimental years were more important in the interactions with the genotypes than was the N fertilization, for both yield and protein content. The most productive cultivars with good stability were ‘Feeling’ and ‘SG 5-01’, and the most valuable varieties regarding the protein content were ‘Pădureni’, ‘Corso’ and ‘GK Tavasz’. A high dose of N assured a high yield and good quality for all cultivars. Although negative correlations were found between production and protein content in HRSW, there were found cultivars that show positive regressions of protein content, such as ‘Pădureni’, ‘Feeling’ and ‘Lona’.

Influence of nitrogen fertilization on formation of productivity elements of facultative triticale when late autumn sowing in the conditions of the Right-Bank Forest-Steppe

Purpose. To establish peculiarities of organogenesis and productivity of facultative triticale under late autumn sowing terms depending on nitrate fertilizations. Methods. The study was carried out in 2016–2018 in stationary field experiment at the farm “Rasavske” (Kaharlyk district of Kyiv region). The influence of autumn sowing terms and nitrate fertilizing on plant productivity elements of the facultative triticale variety Pidzymok kharkivskyi was studied by conventional methods. To evaluate biological features of development of facultative triticale depending on the factors studied the plants on initial stages of organogenesis were taken and microscopic analysis of their apical сones was conducted. Results. In spring 2017, plants of facultative triticale Pidzymok kharkivskyi of the 2nd sowing term were on the I organogenesis stage only, because the emergence has revealed itself under snow during winter. In 2017, 2018 in the II, III and IV organogenesis stages in variants with nitrogen fertilizing there was a tendency to decrease the necessary sum of active temperatures as compared to the control. During the years of the research, the III organogenesis stage continued 7–10 days, but plants formed more spikelet primordia of the ear in year with early spring restoration of the vegetation than on late restoration. Nitrogen fertilization significantly contributed to increase spikelet number per spike of the main stem, especially in the variants of the first sowing term (October, 15). Grain number per spikelet has less correlation with spikelet number per spike thus indicating unused potential of ear. Duration of forming all organs of ear was 27–32 days in the year with early spring restoration of the vegetation (2017) and 19–24 days in the year with late restoration (2018). Conclusions. Late sowing terms and conditions prior to overwintering did not significant effect on facultative triticale overwintering, but its performance was limited by weather factors during the second half vegetation. The weather conditions of the initial periods of vegetation and nitrogen fertilization influenced on spikelet number per spike, and the realization of ear potential (grain number) was 64–75 % of number of fertile flowers in the less favorable 2017 and 75.0–92.4 % in the more favorable 2018.

Influence of Nitrogen Fertilizer on Nitrate Contents of Plants: A Prospective Aspect of Nitrate Poisoning in Dairy Animals

Influence of Nitrogen Fertilizer on Nitrate Contents of Plants: A Prospective Aspect of Nitrate Poisoning in Dairy Animals

Вплив азотних добрив на продуктивність і якість біомаси деяких сортів енергетичної верби в умовах Західного Полісся України

These are the results of research on the influence of nitrogen fertilizers on biomass productivity and biomass qualitative indices of willow energy plantations under conditions of the southern part of Western Polissya, Ukraine. The object of this study were energy plantations of three willow cultivars of Swedish breeding: 'Tora', 'Tordis' and 'Inger', for which the soil ammonium nitrate was added to in the amount of 100, 200, 300, 400 kg / ha . after cutting the bushes; controlled without fertilizers. It is established that fertilizers affect the productivity of the investigated willow cultivars significantly. The yield control of dry biomass of three-year willow energy plantations were Tora 39.8 t / ha, Inger 21.6 t / ha, and Tordis 26.9 t / ha . In terms of fertilization, this indicator of the variety 'Tora' increased with amplifying fertilizer dose to 6.9; 6.2; 4,1 and 1,6 t / ha respectively, in 'Inger' - to 5,9; 6.7; 3.3 and 1.2 t / ha respectively, in 'Tordis' - by 4.6; 4.1; 2.5 and 1.4 t / ha respectively. The three-year willow biomass contains from 1.1 to 1.5% of total nitrogen, from 1.65 to 1.90% of phosphorus and from 1.9 to 2.4% of potassium. Its ash content is 1.2% for Tora and Inger cultivars, and 0.6% for Tordis without applying fertilizers. The index increases with amplifying doses of fertilizers to 2.9% for the Tora, up to 4.0% for 'Inger' and up to 4.1% for 'Tordis'. The biomass calorific value of all cultivars varies insignificantly, from 17.9 to 18.4 MJ / kg in different fertilizer variants. Thus, there is a clear decrease tendency of this index while fertilizer doses are increasing, which is associated with a rise in biomass ash content. The energy output from 1 hectare is quite closely correlated with the fertilization dose for all investigated clones: when the dose is increasing, the energy output is amplified. The most efficient energy output of willow plantation in the three-year crop of biomass is contained in the 'Tora' tree stands - from 729 to 1056 GJ / ha, while this index varies from 395 to 691 GJ / ha for the Inger cultivar, and from 496 to 704 GJ / ha for the Tordis, depending on the fertilizer options. In the interest of increasing productivity of energy plantations in the region of research, it is advisable to apply a dose of 200 kg / ha of ammonium nitrate. Keywords: willow, energy plantation, cultivars 'Tora', 'Tordis' and 'Inger', productivity, ash content, NPK content, biomass calorific value

Influence of Nitrogen Fertilization on Herbicide Selectivity in Rice

ABSTRACT: Chemical weed control and nitrogen fertilization are common practices in irrigated rice crops. Nitrogen is an essential element for growth and development of plants and may influence herbicide selectivity. In this study, herbicide selectivity was evaluated according to nitrogen application time in irrigated rice crops. The experiment was conducted in the field in a split-plot design with four replications. Treatments were arranged in a factorial scheme: factor A consisted of different nitrogen application times (without nitrogen, all nitrogen applied before flooding, half of the nitrogen rate applied before flooding and the other half after flooding, all nitrogen applied after flooding); factor B consisted of the application of the herbicides quinclorac, bentazon, bispyribac-sodium and carfentrazone-ethyl. Nitrogen application increased plant height and dry matter accumulation in rice plants, while nitrogen application before flooding and split N applications were favorable to the crop. The herbicide bispyribac-sodium causes the greatest injury and the greatest reduction in rice plant height, followed by bentazon and carfentrazone-ethyl, while the lowest injury and the highest grain yield were caused by the application of quinclorac.

Influence of long-term nitrogen fertilization on crop and soil micronutrients in a no-till maize cropping system

Sustaining or increasing micronutrient concentrations in food and feed is essential for human and animal health, yet little research has quantified the relative importance of nitrogen (N) fertilization on maize micronutrient concentrations. Nitrogen fertilization could dilute some micronutrients while increasing others (i.e., biofortification). Nitrogen fertilization also influences the amount of residue returned to the soil, potentially altering soil organic carbon (SOC) and micronutrients. While changes in soil micronutrients under long-term production are sometimes attributed to export via harvest or import via fertilization, available micronutrients are also influenced by soil organic matter — changes in SOC could impact available micronutrients. Our objectives were to (1) examine the long-term effects (14 years) of different N rates (0, 68, 120,173, 232 kg ha−1) on the concentration ([]), uptake, and cycling of N and micronutrients (Fe, Zn, Cu, Mn) in no-till continuous maize and (2) assess whether nutrient removal via grain harvest, or residue return have resulted in depletion or accumulation of SOC and available and total micronutrients. Results showed a positive impact of fertilization on stover [N], [Cu] and [Mn], and increased grain [N] and [Fe]. However, fertilization decreased [Zn] in all plant fractions, indicating that maize [Zn] is susceptible to yield dilution. Total and available soil micronutrients were not impacted by fertilization, despite widely differing rates of nutrient harvest and return. Available Cu and Mn followed changes in SOC, which declined in all depths except the surface 0–7.5 cm. Available Zn increased in the surface 0–7.5 cm, with slight increases in deeper depths. Available micronutrients appear to be closely regulated by SOC in this system. These findings give additional insights into how N fertilization impacts maize micronutrient concentrations, and suggest that SOC contributes to micronutrient availability, underscoring the role of SOC in sustaining long-term soil fertility.

The influence of topdressing nitrogen on Azospirillum spp. inoculation in maize crops through meta-analysis

ABSTRACT The Azospirillum is considered one of the most studied plant growth promoter genus. These bacteria are capable of promoting plant growth through several factors. However, the effect of Azospirillum spp. associated to nitrogen fertilization on maize grain yield has brought about controversial results. Thus, the objective of this study was to verify the influence of topdressing nitrogen on the effect of Azospirillum spp. inoculation on maize crops through meta-analysis. Data were collected from articles published in scientific journals, obtained from the Web of Science®, Scopus® and Google Scholar® databases. The bibliographic review included only articles with direct comparisons between maize yield in the presence and absence of Azospirillum spp. under field conditions in Brazil. The meta-analysis of the random effects was carried out using all entries. Subgroup and meta-regression analysis were realized to verify the influence of nitrogen fertilization on the explanation of the possible heterogeneity among effect measures. Maize inoculation with Azospirillum spp. showed an average yield increase of 651.58 kg·ha-1, considering all trials, and of 1034.28 kg·ha-1 considering only the trials without topdressing nitrogen. There was no significant increase in grain yield when inoculation with bacteria from the Azospirillum genus was realized together with nitrogen fertilization, indicating that such technologies are non-additive.

The Influence of Nitrogen Fertilization and Fungicides Treatments on Yield and Quality Obtained from Various Premium Wheat Varieties

Abstract This study analyzes the results obtained during the agricultural year 2015-2016 on the PHD thesis research field and was carried out on a series of 6 wheat varieties (Triticum aestivum L.), of which 5 Premium wheat varieties and one Class A variety. The purpose of this research is to stimulate the expansion of Premium wheat varieties surfaces in Romania. Due to the superior quality of the grains (protein> 14.5%) their use in bakery, will reduce the use of synthesis enhancers. The location of the experimental field was carried out in Draganesti-Vlasca area, at SCDA Teleorman. The aim was to establish optimal technology to maximize the quantity and quality of the yield. Given the crop rotation after peas, the behavior of the wheat varieties was observed on different nitrogen doses. There were applied 3 fertilization fractions with nitrogen (N1-N3) and 3 treatments with fungicides (V1-V3). Determinations of the main foliar and spike diseases were made. The correlation between fertilizer and fungicide treatments showed the differences between yield potential and disease tolerance of the analyzed varieties.

Influence of Agricultural Management on Phytochemicals of Colored Corn Genotypes ( Zea mays L.). Part 1: Nitrogen Fertilization.

In this study, the influence of nitrogen (N) fertilization (170 versus 300 kg of N/ha) on the content of bioactive compounds of whole-meal flour of 10 different colored corn genotypes was investigated. Considerable differences in antioxidant capacity and phytochemical concentrations were observed among genotypes. Higher N fertilization rates significantly ( p < 0.05) increased the content of both total cell-wall-bound phenolics and xanthophylls (lutein and zeaxanthin). Nevertheless, the main phenolic acids (ferulic, p-coumaric, and sinapic acids) as well as the antioxidant capacity and content of β-cryptoxanthin, β-carotene, and total anthocyanins did not show significant differences as far as the N fertilization rate is concerned. For corn cultivation, the application of high N fertilization rates, generally carried out to obtain higher grain yields, could positively influence the content of some bioactives particularly in years characterized by high rainfall levels responsible for N leaching from the soil.