Study of the chemical composition of Urochloa brizantha using the SPAD index, neural networks, multiple linear models, principal components and cluster analysis

Simili, Flávia Fernanda; Barbosa, Karolaynny Rhayana Silva; Augusto, Jeferson Garcia; Menegatto, Leonardo Sartori; Mendonça, Gabriela Geraldi; Bonacim, Pedro Mielli; Gimenes, Flávia Maria de Andrade; Savegnago, Rodrigo Pelicioni

doi:10.1016/j.anifeedsci.2019.114307

Cited by 5 publications

(3 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, the negative correlation of CP with GFY in current study needs further assessment by including a greater number of genotypes as compared to limited (10) genotypes in current study. In present study, unlike the negative correlation by [40] in Urochloa brizantha, we found the positive and signi cant association of SPAD with the lignin content. This is the rst report for the potential use of SPAD as proxy trait to select for cultivars with better digestibility, however, further con rmation using the biochemical data from large number of genotypes can be helpful to validate the ndings.…”

Section: Relationship Between Traitscontrasting

confidence: 95%

Morpho-physiological traits and SSR markers-based analysis of relationships and genetic diversity among fodder maize landraces in India

et al. 2023

View full text Add to dashboard Cite

Background: Maize is an excellent fodder crop due to its high biomass, better palatability, succulency, and nutrition. Studies on morpho-physiological and biochemical characterization of fodder maize are limited. The present study aimed to explore the genetic variation in fodder maize landraces for various morphophysiological traits and estimation of genetic relationship and population structure.Methods and Results: The study in 47 fodder maize landraces revealed signi cant variation for all morpho-physiological traits except leaf-stem ratio. Plant height, stem girth, leaf-width and number of leaves showed positive correlation with green fodder yield. Morpho-physiological traits-based clustering grouped the landraces into three major clusters, whereas neighbour joining cluster and population structure analysis using 40 SSR markers revealed four and ve major groups, respectively. Most landraces of Northern Himalaya-Kashmir and Ludhiana fall into a single group, whereas rest groups mainly had landraces from North-Eastern Himalaya. A total of 101alleles were generated with mean polymorphic information content value of 0.36 and major allele frequency of 0.68. The pair wise genetic dissimilarity between genotypes ranged from 0.21 and 0.67. Mantel test revealed weak but signi cant correlation between morphological and molecular distance. Biochemical characterisation of superior landraces revealed signi cant variation for neutral detergent ber, acid detergent ber, cellulose and lignin content.Conclusion: Interestingly, signi cant, and positive correlation of SPAD with lignin content can be explored to bypass the costly affair of invitro quality assessment for digestibility parameters. The study identi ed superior landraces and demonstrated the use of molecular markers in genetic diversity assessment and grouping of genotypes for fodder maize improvement.

show abstract

Section: Relationship Between Traitscontrasting

confidence: 95%

Morpho-physiological traits and SSR markers-based analysis of relationships and genetic diversity among fodder maize landraces in India

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Thirty-five days after the emergence of plants, the SPAD index was measured using the portable equipment SPAD502, in the leaves located in the upper third part of each plant. Studies have shown that the SPAD Index is an important predictor of the N contents in leaves (SIMIL et al, 2019) as well as for the chlorophyll contents (BOYDSTON et al, 2018). After that, the plants were removed from the pots and the root nodules were quantified.…”

Section: Experiments Evaluationmentioning

confidence: 99%

Influence of Molybdenum doses in inoculation and mineral fertilization in cowpea beans

et al. 2020

View full text Add to dashboard Cite

In some leguminous plants, associations with nitrogen-fixing microorganisms allow their nutrition with nitrogen (N) from the atmosphere. This process is known as Biological Nitrogen Fixation (BNF), where through nitrogenase enzymes, N2 is converted to an available form. This process can replace in part, or in total, nitrogen fertilizers. Cowpea bean is a legume species that is recognized for its high capacity to carry out BNF. In the last decades, studies have encouraged small farmers from north and northeast Brazil to use inoculants with rhizobia species since the results of researches have demonstrated that inoculation is an interesting strategy to improve cowpea production. Considering the specific function of molybdenum (Mo) in the N assimilation, different doses of Mo were tested in this study in order to find doses that could improve and enhance BNF. Therefore, this study aimed to compare nitrogen fertilization and BNF in the N assimilation by plants with different Mo doses. Inoculation was performed with the strains UFLA 03-84 and INPA 03-11B. Doses of Mo were applied in seeds and each pot contained five seeds. Thirty-five days after germination, the plants were analyzed for shoot dry matter and fresh matter, N contents and accumulation, as well as the Soil-Plant Analysis Development (SPAD) Index and nodulation in inoculated plants. The different doses of Mo and also the nodulation treatments did not show significant differences in the contents of N. Plants with N fertilization had significant higher shoot dry matter and root dry matter production, in addition to higher N foliar contents and N accumulation. Therefore, BNF was not as efficient as nitrogen fertilization in the evaluated experimental conditions using cowpea beans.

show abstract

“…O solo constitui-se em um ecossistema diversificado no qual as raízes de plantas e microrganismos interagem e desempenham papéis importantes na mineralização de nutrientes influenciando na composição química de plantas para consumo humano e animal (Taiz et al, 2017, Simili et al, 2019. No Brasil, os sistemas de produção de carne e leite bovinos dependem quase que exclusivamente de pastagens.…”

Section: Introductionunclassified

Crescimento e nutrição da Urochloa brizantha cv. Marandu inoculada com bactéria promotora de crescimento vegetal e sob diferentes doses de nitrogênio

Pinc

Cione

Neto

et al. 2020

RSD

View full text Add to dashboard Cite

A demanda por produção de quantidades adequadas de biomassa vegetal é um grande desafio da pecuária brasileira que enfrenta grave situação em relação à degradação da maioria das pastagens nativas ou cultivadas, especialmente em solos deficientes em nutrientes biogênicos como o nitrogênio. O objetivo do presente estudo foi avaliar o crescimento e nutrição de Urochloa brizantha em decorrência da inoculação com Azospirillum brasilense associado com adubação nitrogenada. O experimento foi conduzido em casa de vegetação da Universidade Paranaense – UNIPAR, Umuarama – PR. O delineamento experimental foi inteiramente casualizado, constituído por seis tratamentos (testemunha, inoculado sem N, inoculado + 50 e 75 kg ha-1 N, sem inoculação + 50 e 75 kg ha-1 N) e cinco repetições cada. 10 dias após a semeadura efetuou-se o desbaste das plantas em excesso deixando apenas cinco plantas por vaso. 60 dias após a semeadura, as plantas foram coletadas para análise de massa seca, alongamento foliar e teores de nutrientes foliares. A inoculação resultou em um ganho na massa seca da parte aérea, comprimento de parte aérea e número de perfilhos, porém não houve ganho em massa seca da raiz. Pôde-se observar maior concentração de nitrogênio foliar e índice de clorofila nos tratamentos com maiores concentrações de adubação nitrogenada, inoculado ou não. Portanto, conclui-se que a inoculação com A. brasilense associado à adubação nitrogenada se mostrou um excelente aliado no aumento da produção e no desenvolvimento de U. brizantha cv. Marandu.

show abstract

Study of the chemical composition of Urochloa brizantha using the SPAD index, neural networks, multiple linear models, principal components and cluster analysis

Cited by 5 publications

References 29 publications

Morpho-physiological traits and SSR markers-based analysis of relationships and genetic diversity among fodder maize landraces in India

Morpho-physiological traits and SSR markers-based analysis of relationships and genetic diversity among fodder maize landraces in India

Influence of Molybdenum doses in inoculation and mineral fertilization in cowpea beans

Crescimento e nutrição da Urochloa brizantha cv. Marandu inoculada com bactéria promotora de crescimento vegetal e sob diferentes doses de nitrogênio

Contact Info

Product

Resources

About