Estimative of Black Pepper leaf area with basis on the leaf blade linear dimension

Partelli, Fábio Luiz; Vieira, Henrique Duarte; Viana, Alexandre Pío

doi:10.1590/s0103-84782007000500039

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…Apesar do maior número de folhas em relação aos demais genótipos, as folhas de menor tamanho (pequenas e estreitas) são características das plantas de 'Cingapura' (Poltronieri et al, 2005;Serrano et al, 2006). Esta menor área foliar da 'Cingapura' já foi comprovada por Partelli et al (2007) e pode explicar o fato de essas mudas não terem apresentado maior massa de matéria seca da parte aérea, quando comparada com a das demais.…”

Section: Resultsunclassified

Produção de mudas de pimenteira-do-reino em substrato comercial fertilizado com adubo de liberação lenta

Serrano

Marinato

Magiero³

et al. 2012

Rev. Ceres

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Production of black pepper clonal cuttings in commercial substrate with controlled-release fertilizerThe diseases caused by soil pathogens have brought severe losses to black pepper because of plant premature death. Thus, the objective of this work was to evaluate the production of black pepper (Piper nigrum) clonal cuttings in commercial substrate fertilized with five doses of controlled-release fertilizer. It was evaluated three genotypes 'Guajarina', 'Iaçará' and 'Cingapura', cultivated in plastic bags filled up with commercial substrate composed by pinus bark and vermiculite (without soil) fertilized with five doses of controlled-release fertilizer of the formula NPK 15-09-12: 0.0, 2.5, 5.0, 7.5 and 10 kg m . At 120 days after transplanting, the results showed growth differences among genotypes for all parameters, except plant height. The controlled-release fertilizer doses interfered on plants growth, but the interaction genotype x doses was observed only for leaf number, root dry matter and total dry matter. The highest values for total dry matter were recorded for cv. Guajarina, while cv. Cingapura showed the lowest value. The highest values for total dry matter of black pepper cuttings were obtained with the doses 4.4 kg m -3 for 'Guajarina'; 6.4 kg m -3for 'Iaçará' and 5.3 kg m -3 for 'Cingapura'.

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Section: Resultsunclassified

Produção de mudas de pimenteira-do-reino em substrato comercial fertilizado com adubo de liberação lenta

Serrano

Marinato

Magiero³

et al. 2012

Rev. Ceres

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“…In addition, Bianco et al (2007aBianco et al ( ,b, 2008aBianco et al ( ,b, 2009 and Duarte et al (2009) affirmed that this linear model is of more simple and better practical use for leaf area estimation. The relation between observed and predicted values of alfalfa leaf area, tested for validation of the model (Partelli et al 2007), showed high coefficient of correlation (R = 0.96), being also highly significant (P < 0.01) ( Figure 2). This indicates that the selected linear model is adequated to estimate the alfalfa leaf area.…”

Section: Resultsmentioning

confidence: 99%

Determination of alfalfa leaf area by non-destructive method

Bianco¹,

Carvalho²,

Bianco³

2011

Commun. Plant Sci.

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The knowledge of plant leaf area is important to evaluate the vegetal growth. The objective of this research was to determine a mathematical equation to estimate successfully alfalfa (Medicago sativa) leaf area by measuring linear dimensions of the leaf blade of the plant leaflets. The leaves were collected from cultivar 'Crioula' cropped at field conditions in Jaboticabal, SP, Brazil. The leaflets length, width and leaf blade area were determined electronically. Linear, geometric and exponential equations were tested, considering the length and width separately and the length × width relation. The lateral leaflets showed similar dimensions and they were different to the central leaflet. So, it was opted to analyze the lateral leaflets together. All equations described satisfactorily the alfalfa leaf area, but it was opted for the linear equation passing through the origin due to its better practical application, showing high significance and normal distribution of residuals. This equation was validated with coefficient of correlation of 0.96, showing high significance (P < 0.01). The alfalfa leaf area can be estimated by the equation LA = 0,691156 × LWct + 0,3652754 × LWlt, where LWct is the central leaflet length × width and LWlt is the sum of the left and right lateral leaflets length × width.

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“…Measurement of leaf area can be done directly in a destructive or non-destructive manner, and indirect in a non-destructive manner (Partelli et al, 2006(Partelli et al, , 2007Busato et al, 2010;Guimarães et al, 2013). In order to determine the leaf area directly, the leaves are collected from the plant, which characterizes this method as destructive and of high labor.…”

Section: Introductionmentioning

confidence: 99%

Research Article Equations for estimation of the foliar area of Coffea canephora genotypes

Dubberstein¹,

Martins²,

Ferreira³

et al. 2019

Genet. Mol. Res.

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Knowledge of the leaf characteristics of the coffee tree, such as leaf dimensions, is of great importance for management of this crop, since it directly impacts on plant development. We evaluated the genetic diversity of 43 Coffea canephora genotypes and developed and compared mathematical models for estimating the leaf area of distinct genotypes using linear characteristics. Leaves from 2½ year old trees were collected from the upper middle third of the plant and the length of the central vein and maximum width of the leaf were measured; the leaf area was subsequently measured to determine real leaf area (RLA). The variables leaf length (L), leaf width (W), RLA and length x width (LW) were subjected to Pearson correlation analysis and grouped by the Tocher optimization method. All combinations were tested by linear models according to the measured parameters, and for each model R 2 was adjusted and Bayesian information criterion tested. After choosing the variable, equations were defined considering two parameters, which were ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 18 (4): gmr18486 D. Dubberstein et al. 2 subjected to cross-validation by comparing between observed x predicted areas. The 43 genotypes formed three groups according to the Tocher procedure, wherein one group was comprised of 41 genotypes. High Pearson linear correlations were found between LW x RLA (0.99), followed by W x RLA (0.95), and as such, LW best estimated the coffee leaf area; but the variable width can also be adopted, with greater ease of field measurement. The equations designed including both variables were significant at 1% and 0.1% according to the F test, and cross-validation analysis confirmed the adjustment of the equations, with equal or very similar values.

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Estimative of Black Pepper leaf area with basis on the leaf blade linear dimension

Abstract: This research was aimed at establishing regression equations to estimate black pepper (Piper

Cited by 4 publications

References 8 publications

Produção de mudas de pimenteira-do-reino em substrato comercial fertilizado com adubo de liberação lenta

Produção de mudas de pimenteira-do-reino em substrato comercial fertilizado com adubo de liberação lenta

Determination of alfalfa leaf area by non-destructive method

Research Article Equations for estimation of the foliar area of Coffea canephora genotypes

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