Monitoring and evaluation of need for nitrogen fertilizer topdressing for maize leaf chlorophyll readings and the relationship with grain yield

Silva, Maria Anita Gonçalves da; Muniz, Antônio Saraiva; Mannigel, Anny Rosi; Porto, Simone Maria Altoé; Marchetti, Marlene Estevão; Nolla, Antônio; Grannemann, Ivan

doi:10.1590/s1516-89132011000400004

Cited by 8 publications

(8 citation statements)

References 37 publications

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“…The application of 120 kg N ha -1 resulted in an increase of 22% and 15% in the chlorophyll levels compared to the not fertilized treatment with N, respectively, for the spring-summer and summer-fall seasons ( Figure 3A). Similarly, Silva et al (2011) reported that the N fertilizer topdressing resulted in an increase in the chlorophyll level of two maize cultivars. Maia et al (2013) applied 160 kg N ha -1 in topdressing and, also verified chlorophyll levels 13% higher in common bean cv.…”

Section: Inoculation Treatmentmentioning

confidence: 91%

Can co-inoculation of Rhizobium tropici and Azospirillum brasilense increase common bean nodulation and grain yield?

Steiner

Ferreira

Zuffo

2019

SCA

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O uso de rizobactérias promotoras de crescimento de planta (RPCP) associado a inoculação de rizóbio pode otimizar a fixação biológica de nitrogênio (FBN), diminuindo o uso de fertilizantes nitrogenados e aumentando o crescimento da planta e o rendimento da cultura do feijão. Um estudo foi conduzido para investigar a eficácia da coinoculação de Rhizobium tropici e Azospirillum brasilense e da adubação nitrogenada em cobertura na nodulação, no crescimento e no rendimento de grãos do feijoeiro (Phaseolus vulgaris L.) cultivado em solo arenoso da região do Cerrado brasileiro, durante duas safras de produção (“safra das águas” e “safra da seca”). O delineamento experimental foi o de blocos casualizados em esquema de parcelas subdivididas, com quatro repetições. As parcelas constituíram de quatro tratamento de inoculação das sementes: controle (não inoculado); inoculação com Rhizobium tropici; inoculação com Azospirillum brasilense; e, coinoculação com R. tropici e A. brasilense; e as subparcelas por cinco doses de N em cobertura (0, 30, 60, 90 e 120 kg ha-1). A inoculação das sementes com Rhizobium tropici isoladamente ou combinado com Azospirillum brasilense melhorou a nodulação das raízes e o rendimento de grãos do feijoeiro comum quando a cultura foi cultivada durante a “safra da seca”. Portanto, a resposta positiva da inoculação das sementes com Rhizobium e Azospirillum no rendimento de grãos depende das condições ambientais durante a safra de produção, especialmente da menor taxa de precipitação pluvial por estimular a nodulação das raízes. A inoculação com A. brasilense isoladamente não foi uma prática agronômica eficiente para ser utilizada no cultivo do feijoeiro nas condições brasileiras, resultando em rendimento de grãos equivalente às plantas do tratamento não inoculado nas duas safras de produção. O aumento das doses de adubação nitrogenada em cobertura inibe a formação e o crescimento dos nódulos radiculares do feijoeiro. A dose de adubação nitrogenada em cobertura ótima para o cultivo do feijoeiro em solos arenosos da região do Cerrado brasileiro pode variar entre 80 e 90 kg ha-1 de N.

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Section: Inoculation Treatmentmentioning

confidence: 91%

Can co-inoculation of Rhizobium tropici and Azospirillum brasilense increase common bean nodulation and grain yield?

Steiner

Ferreira

Zuffo

2019

SCA

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“…The GNDVI has been shown to be sensitive to plant chlorophyll concentrations, 89,90 which has been found to be directly related to end-of-season grain yields. 91,92 Previous studies have found that spectral data taken at flowering have produced the highest correlations with sorghum final grain yield, 45,73 which is why we chose to determine clusters with spectral data from this growth stage. Despite a trend of historical yield improvement for the hybrids used in this study, 93 hybrids in this study were not selected specifically for yield differences.…”

Section: Discussionmentioning

confidence: 99%

High-resolution unmanned aircraft systems imagery for stay-green characterization in grain sorghum (Sorghum bicolor L.)

Barnhart

Demarco

Prasad

et al. 2021

J. Appl. Rem. Sens.

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Grain sorghum (Sorghum bicolor [L]. Moench) is a crucial crop to the world's semiarid regions, as it can produce grain and biomass yields in precipitation-limited environments. Many genotypes have a characterized form of drought resistance known as the stay-green (SG) trait, enabling sorghum plants to resist postflowering drought stress that can severely reduce yields. Breeding for SG sorghum lines is considered vital for sorghum breeders around the world, but selecting for SG traits currently relies on methods that are labor-intensive and timeconsuming. Using unmanned aerial systems capable of capturing high-resolution imagery offers a solution for reducing the time and energy required to select for these traits. A field study was conducted in Manhattan, Kansas, where 20 Pioneer ® sorghum hybrids were planted in a randomized complete block design with three replications per hybrid. Imagery was collected with a DJI ® Matrice 200™ equipped with a MicaSense ® RedEdge-MX™ multispectral camera. Flight altitude was 30 m, and flights were collected under clear, sunny skies within AE2.5 h of solar noon. Ground-measured data included visual senescence ratings, fresh and dry plant biomass, leaf area index, and final grain yield. After correlation and regression analysis, results indicated significant relationships with the near-infrared spectral band with fresh and dry plant biomass samples, the green normalized difference vegetation index scores at flowering were the most related to final grain yield, and the visible atmospherically resistant index was the most related to visual senescence scores. Significant spectral band/vegetative indices were clustered into groups, and significant differences were found between various traits. We have developed a methodology for SG sorghum growers to collect, process, and extract data for more efficient identification of traits of interest. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 International License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…These results implied that, after enriched N at R1 growth stage, the shoot biomass increased more than that of root biomass. While at R1 growth stage, soybean demanded a plentiful nutritions and better canopy for photosynthesis, substance accumulation and material transportation 4,9,34 , the increased shoot biomass benefited for reproductive growth. Among three N treatments, the root/shoot rate of high yield cultivar was always lower than that of common yield cultivar, which implied that high yield cultivar have a strong root systems.…”

Section: Discussionmentioning

confidence: 99%

“…The N application affected the carbon metabolism and dry mass accumulation complicatly 8,30–33 . N application at flowering stage influenced the reproductive growth and grain yield significantly 4,9,34 . It have been proved that applying N at R1 stage significantly increased the grain yield of two soybean cultivars with different yield potentials 35 .…”

Section: Introductionmentioning

confidence: 97%

“…Nitrogen is an essential element for soybean ( Glycine max L.) 1–4 . Nitrogen is critical for high grain yield 2,4,5 , by improving the leaf area, biomass 4 , grain-filling rate 6 , and translocation of stem non-structural carbohydrates 7 . The time of N application is one of the determinant factor to maximize the grain yield, which influenced the number of flowers 2,8 .…”

Section: Introductionmentioning

confidence: 99%

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Rapid Effect of Nitrogen Supply for Soybean at the Beginning Flowering Stage on Biomass and Sucrose Metabolism

Zhou

Yao

Zhao

et al. 2019

Sci Rep

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Nitrogen application at the beginning flowering stage (R1 stage) increased the soybean grain yield, however, the rapid effect of enriched nitrogen at R1 growth stage on soybean dry matter accumulation and sugar metabolism is still unclear. Continuous high nitrogen (CHN), Continuous low nitrogen (CLN), Enriched nitrogen supply at R1 stage (ENS) treatments were applied on two soybean cultivars (Liaodou11, Liaodou14), to investigate the effect of enriched nitrogen on plant biomass accumulation and sucrose metabolism. After 12 h of ENS treatment, the root/shoot rate of both cultivars were lower than that of CLN, but at 24 h it was no significant difference between ENS and CLN. Enriched N at R1 stage, soybean kept a balance of sucrose synthesis and decomposition in leaf by affecting sucrose synthetase (SS) and sucrose phosphate synthase (SPS) activities. Under N limitation condition the plant dry matter accumulation supported root growth priority. Enriched N at R1 stage resulted in the rapid shoot biomass accumulation. In high yield cultivar, the shoot growth was priority to root growth, the common yield cultivar was on the contrary. Our result suggest that enrich N at R1 stage resulted in the accumulation of biomass in shoot rapidly.

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Monitoring and evaluation of need for nitrogen fertilizer topdressing for maize leaf chlorophyll readings and the relationship with grain yield

Abstract: The study was carried out for two years in maize in succession to the wheat using no tillage system in a distroferric Red Latosol (Hapludox)

Cited by 8 publications

References 37 publications

Can co-inoculation of Rhizobium tropici and Azospirillum brasilense increase common bean nodulation and grain yield?

Can co-inoculation of Rhizobium tropici and Azospirillum brasilense increase common bean nodulation and grain yield?

High-resolution unmanned aircraft systems imagery for stay-green characterization in grain sorghum (Sorghum bicolor L.)

Rapid Effect of Nitrogen Supply for Soybean at the Beginning Flowering Stage on Biomass and Sucrose Metabolism

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