Yield and nutritional efficiency of corn in response to rates and splits of nitrogen fertilization

Amado, Telmo Jorge Carneiro; Villalba, Enrique Oswin Hahn; Bortolotto, Rafael Pivotto; Nora, Douglas Dalla; Bragagnolo, Jardes; León, Enrique Asterio Benítez

doi:10.1590/0034-737x201764040003

Cited by 9 publications

(5 citation statements)

References 19 publications

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“…The low PE indicates that accumulation of nutrients (input) was higher than the grain yield (output). Amado et al, (2017) observed PEN was higher when N application rates were low and it decreased as N levels increased, similar to our findings. The researchers recorded PEN value of 40 kg kg -1 from the application of N@180 kg ha -1 , which is comparable to our report, which obtained PEN value of 43.4 kg kg -1 at the same rate of nitrogen application.…”

Section: Physiological Efficiencysupporting

confidence: 92%

Nutrient Use Efficiency Indices in Maize Hybrid as A Function of Various Rates of NPK in Mid Hills of Nepal

Rawal¹,

Pande

Shrestha

et al. 2021

Turkish JAF Sci.Tech.

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Field experiments were conducted to evaluate yield and nutrient use efficiency in maize in response to various rates of nitrogen (N), phosphorus (P) and potassium (K) in silty clay loam soil of Khumaltar, Nepal during 2019 and 2020. Three factorial randomized complete block designs with 27 treatment combinations were used in experiments, which were repeated three times. Three factors were N levels (150, 180, 210 N kg ha-1), P levels (40, 60, 80 P2O5 kg ha-1), and K levels (40, 60, 80 K2O kg ha-1). The results recommend to revise fertilizer dose since N210 kg ha-1 and K2O 80 kg/ha were optimum for increased maize production with grain yields of 10.95 t ha-1 and 10.54 t ha-1, respectively. Partial factor productivity, partial nutrient budget, internal efficiency, physiological efﬁciency, recovery efficiency, and agronomic efﬁciency of NPK for hybrid maize were mostly influenced by nutrient levels. Application of higher rate of P and K fertilizer improved maize N efficiencies, and case was valid for P and K efficiencies. Maize was more responsive to N and K fertilizer and lower rate of P application limited efficient use of applied N and K. To increase overall NUE, we recommend to revise dose of fertilizer for hybrid maize under mid hill condition of Nepal.

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Section: Physiological Efficiencysupporting

confidence: 92%

Nutrient Use Efficiency Indices in Maize Hybrid as A Function of Various Rates of NPK in Mid Hills of Nepal

Rawal¹,

Pande

Shrestha

et al. 2021

Turkish JAF Sci.Tech.

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“…Já os autores Grohs, Mundstock & Poletto (2009), Motomiya (2009) e Machado (2015) afirmam que há correlação entre o NDVI e fatores como: mofo-branco, no artigo publicado por Machado (2015), potencial produtivo de trigo e cevada no trabalho de Grohs, Mundstock & Poletto (2009), e a deficiência de N em algodoeiros, em resultado da pesquisa de Motomiya (2009). No caso específico do milho e sua relação com o nutriente N, o NDVI é comumente utilizado, e o sensor GreenSeeker tem especial relevância no assunto, sendo utilizado em trabalhos como o de Amado et al (2017), que avaliaram no seu trabalho a resposta da produtividade do milho e eficiência de aplicação de N no sul paraguaiano, onde os mesmos observaram o acréscimo do valor de NDVI após a aplicação do N do estágio V8 para V12 da planta, e no trabalho de Walsh (2015) que citou em seu trabalho a experiência de produtores que fizeram uso do sensor GreenSeeker para melhor manejar a aplicação de N em Idaho nos Estados Unidos.…”

Section: Resultsunclassified

Approaching of GOPRO camera embedded on UAV to calculate NDVI for corn’s crop

et al. 2020

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Nitrogen (N) is a macronutrient used in large quantities in modern agriculture, due to a quantity required by plants. In the corn crop, it mainly acts on grain filling and affects protein content. One of the causes of the inefficiency of the use of nitrogen fertilizers in the corn crop is the difficulty in estimating in a timely manner the need of nitrogen fertilization through soil and / or plant analyzes. Looking for feasibility of the recommendation process of nitrogen fertilization in real time, researches has been developed aiming to detect nitrogen deficiency using remote sensing. In this paper the objective was to evaluate the feasibility of the use of the Normalized Difference Vegetation Index (NDVI), calculated by means of multispectral image processing obtained with the GOPRO’s camera and the Micasense’s Seqouia camera, embedded in UAV’s, to recommend the application of nitrogen fertilizers to the corn crop. According to results obtained with this paper, it was possible to conclude that the determination of NDVI by means of aerial images is compatible with the determination of the index using active optical sensor (GreenSeeker).

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“…Maize crop responses to N fertilizer application are variable and depend on several factors, such as the management system adopted (conventional, no-tillage, and crop rotation), the previous crop, the use of hybrids, the region (climate, soil, and altitude) and the planting season. The literature shows different results, with the highest maize yields obtained under N rates of 20 to 90 kg ha -1 (Simão et al, 2021), 60 to 120 kg ha -1 (Amado et al, 2017), 0 to 180 kg ha -1 (Ahmad et al, 2020) or even 250 kg ha -1 (Lyra et al, 2014) applied as topdressing.…”

Section: Introductionmentioning

confidence: 98%

Nitrogen management in second-crop maize in Southwestern Goiás

et al. 2023

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Nitrogen (N) fertilizer management is a key factor in the success of maize crops. The objective of this work was to evaluate the response of second-crop maize to N applied exclusively as topdressing or at planting + topdressing. Five experiments were conducted in areas in southwestern Goiás in 2019 and 2020 to evaluate N application rates of 0 and 30 kg ha-1 at planting, combined with five N rates applied as topdressing at the maize V3 stage over a total of 0, 75, 150, 225, and 300 kg ha-1. Dry matter production in the V6 or V9 stage and yield parameters at harvest were evaluated. N application did not affect the number of grain rows per ear but increased the number of grains per row and, particularly, grain weight. The crop responded positively to increases in the total N rate in 4 of the 5 experiments: in 1 of these experiments, N fertilizer application at planting contributed to an increase in the efficiency of topdressing fertilization, resulting in a higher maize yield with a lower total N rate; in the other 3, a positive maize response to N occurred when total N was applied as topdressing at V3. However, the highest mean maize grain yield (8,233 kg ha-1) was found in the trial that showed no response to N fertilizer application - probably due to the better chemical fertility conditions of the area combined with an adequate distribution of rainfall, considering the multiple factors involved in N application recommendations.

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Yield and nutritional efficiency of corn in response to rates and splits of nitrogen fertilization

Cited by 9 publications

References 19 publications

Nutrient Use Efficiency Indices in Maize Hybrid as A Function of Various Rates of NPK in Mid Hills of Nepal

Nutrient Use Efficiency Indices in Maize Hybrid as A Function of Various Rates of NPK in Mid Hills of Nepal

Approaching of GOPRO camera embedded on UAV to calculate NDVI for corn’s crop

Nitrogen management in second-crop maize in Southwestern Goiás

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