Densidade De Plantas E Adubação Nitrogenada Em Cobertura No Desenvolvimento E Desempenho Produtivo Do Milho

Zucareli, Claudemir; Piazzoli, Denis; Sapucay, Moryb Jorge Lima da Costa; Prando, André Mateus; Júnior, J. A. de Oliveira

doi:10.18512/1980-6477/rbms.v18n2p178-191

Cited by 3 publications

(3 citation statements)

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“…Only the plant population factor had a significant effect (P < 0.05) on all studied variables, except for the plant height characteristic (Table 1). With the increase in the population of 35,000 to 80,000 plants ha -1 the stem diameter linearly decreased (Figure 2a), agreeing with the works of Brachtvogel et al (2012) and Zucareli et al (2019), who also observed a decrease in stem diameter with increasing populations of 30, 45, 60, 75, 90 and 105; 40, 60, 80 and 100 thousand plants ha -1 , respectively. Plants when subjected to high populations due to intraspecific competition, seek growth above the canopy to avoid shading and capture sunlight, thus the photoassimilates are intended to promote accelerated growth, thus reducing other parts of the plant such as the stem diameter (TAIZ, ZEIGER, 2017).…”

Section: Morphophysiological Characterization Of Different Plant Popu...supporting

confidence: 88%

Performance of second crop maize hybrids in different population densities

Ulrich,

Sousa,

Guimarães

et al. 2023

R. Agrogeoambiental

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The cultivation of second crop (safrinha) maize (Zea Mays L.) has progressed in Brazil. The maize plant population recommendation for the second crop is drastically reduced. This work aimed to evaluate the morphophysiological characters of ear and yield components in different populations of plants and maize hybrids. The experiment was cultivated in a no-tillage system in the second crop of the 2019/2020 agricultural year in Unaí-MG and carried out according to a randomized block design in subdivided plots, with the five simple maize hybrids KWS (K9105VIP3, K9960VIP3, K9606VIP3, K9555VIP3 and K8774PRO3) considered as parcels and the four populations (35.000, 50.000, 65.000 and 80.000 plants he-1), considered as subplots. The maize hybrids did not influence (P>0,05) the variables. The populations of 35.000, 65.000 and 80.000 plants he-1 resulted in the highest (P<0,05) number of rows, number of grains per row and ear length. The increase in plant population influenced (P<0,05) positively the grain yields up to the population of plant density of 68.200 plants he-1 with grain yield of 9.302 kg he-1. Population densification, even increasing competition for resources negatively influencing most plant and ear characters, increases grain yield due to the greater amount of ear per area.

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Section: Morphophysiological Characterization Of Different Plant Popu...supporting

confidence: 88%

Performance of second crop maize hybrids in different population densities

Ulrich,

Sousa,

Guimarães

et al. 2023

R. Agrogeoambiental

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“…Nutritional management is important for the corn crop to express its maximum production potential (ZUCARELI et al, 2019). However, in saline environments the ionic interactions that affect the availability, absorption and transport of nutrients are even more complex, mainly due to differences in concentration and ionic composition (higher accumulation of Na + and Cl -), resulting in lower absorption and concentrations of N, P, K, Ca and Mg (SOUSA et al, 2010;IBRAHIM et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Saline Water and Nitrogen Fertilization on Leaf Composition and Yield of Corn

Sousa

Santos

et al. 2022

Rev. Caatinga

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Absence of drainage associated with high evapotranspiration and irregular precipitations contributes to the accumulation of salts in the soil, reducing nutrient absorption and yield. Nutritional management is important for the crop to express its maximum production potential, and nitrogen is the macronutrient most required by the corn crop. The objective of this study was to evaluate yield and leaf contents in corn under different nitrogen fertilization recommendations and salt stress. The experiment was conducted from June to September 2019, at the University of International Integration of Afro-Brazilian Lusophony in Redenção-CE, Brazil. The experimental design used was completely randomized, in a 2 x 3 factorial arrangement, with 6 replicates, with two levels of electrical conductivity (0.3 dS m-1 and 3.0 dS m-1) and three nitrogen fertilization recommendations (0, 50 and 100% of the recommendation). The variables analyzed were unhusked ear weight, husked ear weight, yield and leaf contents of N, P, K, Ca, Mg and Na. Irrigation with saline water (3.0 dS m-1) reduces the unhusked ear weight, husked ear weight and yield. Nitrogen fertilization recommendations of 50% and 100% promoted higher values of unhusked ear weight, husked ear weight and leaf N contents, but reduced leaf P contents. The 50% and 100% recommendations promote higher yield values for the two levels of electrical conductivity studied (0.3 and 3.0 dS m-1). The 50% and 100% recommendations associated with saline water irrigation increased the leaf contents of K, Na, Mg and Ca.

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“…Macronutrients and especially N adequacy in plants are the factors that can make a difference in their production and tackle the problem of food demand when used cautiously [2,3]. N fertilization for maize cultivation can be very crucial to provide a good development and growth of maize plants [4]. Nitrogen uptake efficacy in fully cultivated soils has always been a difficult task in farming because the N flow in an ecosystem can vary from runoff to surface waters to N atmospheric release [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Comparative Evaluation of Mineral and Organo-Mineral Nitrogen Fertilization and the Role of Amino Acids as Plant Growth Promoters in Maize Cultivation

Efthimiadou¹,

Sparangis²,

Leonidakis³

et al. 2022

Agronomy

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The challenge to increase nitrogen uptake efficiency in intensively cultivated soils without runoffs and atmospheric release has been difficult to handle and usually leads to the excess application of mineral fertilizers. In the present study, four combinations of two different N fertilizers and a control were used in maize cultivation to evaluate the use of different types of N fertilization in the case of agronomic and plant physiology characteristics, as well as the quantity and quality characteristics of maize’s yield. The results show that, when the full rate of mineral fertilization with the addition of half rate of organo-mineral fertilizer with amino acids (MF+OMAA/2) was used, maize presented a 16% yield increase in comparison with the control, followed by mineral fertilization (MF) with a 10% increase. Protein content was increased in all treatments by 3–6% compared to the control, with the conventional fertilization and the alternates with lower rates of mineral fertilization not differing significantly. The nitrogen content in the leaves of maize increased in both measurements (11–23% and 19–40% at 70 and 107 days after sowing, respectively) of the different fertilizer treatments compared to the control. The results of this study confirm that the organo-mineral fertilizer containing amino acids can be used as an alternative or additive N fertilization that can decrease the use of conventional mineral fertilizers or can result in improved seed productivity and protein content in maize farms.

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Densidade De Plantas E Adubação Nitrogenada Em Cobertura No Desenvolvimento E Desempenho Produtivo Do Milho

Cited by 3 publications

References 0 publications

Performance of second crop maize hybrids in different population densities

Performance of second crop maize hybrids in different population densities

Saline Water and Nitrogen Fertilization on Leaf Composition and Yield of Corn

Comparative Evaluation of Mineral and Organo-Mineral Nitrogen Fertilization and the Role of Amino Acids as Plant Growth Promoters in Maize Cultivation

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