Relationships between N, P, and K in corn biomass for assessing the carryover effects of winter pasture to corn

Maccari, Marcieli; Assmann, Tangriani Simioni; Bernardon, Angela; Soares, André Brugnara; Franzluebbers, Alan J.; Bortolli, Marcos de; Bortolli, Betania Brum de; Glienke, Carine Lisete

doi:10.1016/j.eja.2021.126317

Cited by 4 publications

(4 citation statements)

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“…Providing the quantification relationship among fertilization and crop growth index, Maccari et al (2021) [7] analysed the relationship between N, P, and K in corn biomass as a function of N application, both under pasture (e.g., 0 and 200 kg N ha -1 , black oat) and under grain crop (e.g., 0, 100, 200 and 300 kg N ha -1 , corn) and found a positive relationship between N:P and N:K concentration as a function of increasing N dose under pasture crop. This relationship can eventually be used to diagnose K deficiencies in the case of systems that cover nutrient anticipation.…”

Section: Discussionmentioning

confidence: 99%

“…In subtropical areas of Brazil, contrary to temperate regions, two or more succeeding crops can be grown in a given year [7]. Therefore, the concept of fertilization systems becomes relevant, with fertilization not being restricted to the nutrient requirements of one crop only (e.g., corn, soybean, cotton) but focusing on the production system as a whole, in which all crops are involved.…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen and potassium fertilization strategies in integrated systems in different black oat management on corn crop

Soares¹,

Assmann²,

Missio³

et al. 2023

Sci. Plena

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This study aimed to evaluate levels of potassium and nitrogen fertilizer inversion in the black oat crop on corn crop yields. The experimental design was a randomized block design with subdivided plots with three repetitions. The treatments were four nitrogen fertilization strategies, four potassium fertilization strategies, and two oat crop managements (forage and cover crop). The strategies involved winter (oats) and summer (corn) application, respectively, with the following combinations of nitrogen (200-0; 150-50; 50-150; 0-200 kg N ha-1) and potassium (80-0; 60-20; 20-60; 0-80 kg K ha-1). We evaluated the morphological aspects, grain productivity, chlorophyll contents, and light interception of oats for forage production and ground cover, and for corn the yield components and productivity. Oats managed as forage showed higher forage mass production but lower values of residual biomass, canopy height, extended tiller length, lodging index, radiation interception, and oat chlorophyll A and total. Light interception in the oat crop was higher when nitrogen was applied in the pasture. For the corn crop, nitrogen applied partially on black oat and the remaining on corn row crop increases stalk diameter. Fertilization strategies showed no significant effect on both crops in the system, indicating that it is possible to reverse or apply the entire amount of N and K predicted for the two crops in winter.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nitrogen and potassium fertilization strategies in integrated systems in different black oat management on corn crop

Soares¹,

Assmann²,

Missio³

et al. 2023

Sci. Plena

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“…Throughout the succession of crops, the bigger amount of biomass cycling by urine and feces must have benefited grain production, and small differences in soil physics, which are not always statistically perceptible, may have promoted grain yield to some degree. According to Maccari et al (2021) in subtropical areas of Brazil, unlike temperate areas, two or more successive crops can be grown in the same year and nutrients applied in one season can be transported to the next season continuously. These authors verified that the transport of nitrogen (N) from a pasture fertilized with N can be considered a viable strategy to reduce N application in maize without harming crop productivity and soil fertility.…”

Section: Dimensionmentioning

confidence: 99%

Economic viability in the integrated crop-livestock system with nitrogen fertilization system and sward canopy heights

Elejalde

Soares

Lima

et al. 2023

Front. Sustain. Food Syst.

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Integrated crop-livestock systems (ICLS) are complex production strategies whose main components are soil, plant, and animal. Several studies addressed the interaction among them and conclude on the technical feasibility of these systems, but few studies assess their economic feasibility. The objective of this work was to analyze the economic feasibility of an ICLS, in which nitrogen was applied on the crop phase or onto the pasture phase, combined with two grazing intensities. The study was carried out on a private farm in the municipality of Abelardo Luz—SC, between October 2012 and April 2018. The experimental design was randomized blocks with three replications. The treatments were arranged in a 2x2 factorial scheme, with two sward heights (high and low) and two times of N-fertilization application, or on the cool-season pasture tillering phase either onto cash crop (200 kg of N ha−1 in a single dose). Crop implementation and maintenance costs were surveyed, followed by crop and livestock production calculations, zootechnical indices, and the revenue of each phase (pasture or grain crop) for the entire system. The cash flow analysis was carried out, generating economic indicators of the three dimensions of the expanded multi-index methodology (MMA) for the system and the treatments. In this study, pasture management with low sward canopy height provided the highest net gains per hectare and per hectare/year, regardless of the nitrogen application time. The use of the ICLS is economically viable, regardless of grazing intensities and nitrogen application times.

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“…The urea cocrystal and urea + potassium humate treatments resulted in higher silage yields than urea treatments, especially with high N rates of 200 kg ha 1 . The fresh and dry silage yields increased with the modified urea treatments due to the higher N uptake [52] (Table 8). Additionally, in response to using urea + potassium humate and urea cocrystal, there were increases in the corn grain yields by 16.88, 34.75, 24.69, and 40.28%, respectively, compared to the control.…”

Section: Nitrogen Uptake and Use Efficiencymentioning

confidence: 99%

Influence of Modified Urea Compounds to Improve Nitrogen Use Efficiency under Corn Growth System

et al. 2022

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Adopting new practices is an imperative need to increase the efficiency of nitrogen use (NUE), especially in selecting appropriate N-fertilizer sources and application doses. Regretfully, conventional urea’s ability to supply nitrogen to soils is quickly lost as a result of volatilization, leaching, and denitrification. Thus, this study’s main aim was to use various modified urea compounds with different doses and investigate their effect on mineral nitrogen release in the soil to improve nitrogen uptake and its use efficiency under the corn growth system. The field trial was conducted in a randomized complete block design (RCBD) by 28 experimental plots. Seven treatments including a control (C), urea (U100 and U200), urea + potassium humate (UPH100 and UPH200), and urea cocrystal (UC100 and UC200) with four replicates were used. The results reported that the treatments significantly (p < 0.05) affected grain yields. The urea treatments (U100 = 100 kg N ha−1, U200 = 200 kg N ha−1) increased the grain yields by 7.16% and 30.53%, respectively, compared to the control (C), while the urea + potassium humate treatments (UPH100 = 100 kg N ha−1, UPH200 = 200 kg N ha−1) and urea cocrystal treatments (UC100 = 100 kg N ha−1, UC200 =200 kg N ha−1) provided a 30.51, 50.47, 39.23, and 56.63% increase in grain yields, respectively, compared to the control. The treatments had significant (p ≤ 0.05) effects on the fresh leaves and stems yield and the dry matter, fresh cob, and dry cob yields. Moreover, the use of modified urea as urea + potassium humate and urea cocrystal at high rates of 200 kg N ha−1 showed highly significant (p < 001) effects on the uptake in grain, stems, and total nitrogen uptake by corn compared to the control and urea alone. This study highlighted that modified urea fertilizers such as urea + potassium humate and urea cocrystal were better than conventional urea to improve corn yield productivity and N use efficiency.

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Relationships between N, P, and K in corn biomass for assessing the carryover effects of winter pasture to corn

Cited by 4 publications

References 37 publications

Nitrogen and potassium fertilization strategies in integrated systems in different black oat management on corn crop

Nitrogen and potassium fertilization strategies in integrated systems in different black oat management on corn crop

Economic viability in the integrated crop-livestock system with nitrogen fertilization system and sward canopy heights

Influence of Modified Urea Compounds to Improve Nitrogen Use Efficiency under Corn Growth System

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