Nutrientes na seiva de plantas cítricas fertirrigadas

Souza, Thaís Regina de; Bôas, Roberto Lyra Villas; Quaggio, J. A.; Salomão, Leandro Caixeta

doi:10.1590/s0100-29452012000200022

Cited by 15 publications

(22 citation statements)

References 4 publications

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“…The mechanisms causing variation in wing size and shape in ACP could well reflect differences in nitrate or other nutrients available in different species of Rutaceae. For example, two varieties of sweet orange ‘Hamlin’ and ‘Valencia’ are known to vary in their sap nitrate content (Souza et al, 2012). While no morphometric comparisons based on nitrate content were made in this study, differences in chemotype and fertilization levels of the plant Melaleuca quinquenervia (Cav.)…”

Section: Discussionmentioning

confidence: 99%

Host plant affects morphometric variation ofDiaphorina citri(Hemiptera: Liviidae)

Paris

Allan

Hall

et al. 2016

PeerJ

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The Asian citrus psyllid (ACP), Diaphorina citri Kuwayama, is one of the most serious citrus pests worldwide due to its role as vector of huanglongbing or citrus greening disease. While some optimal plant species for ACP oviposition and development have been identified, little is known of the influence of host plants on ACP size and shape. Our goal was to determine how size and shape of ACP wing and body size varies when development occurs on different host plants in a controlled rearing environment. ACP were reared on six different rutaceous species; Bergera koenigii, Citrus aurantifolia, Citrus macrophylla, Citrus maxima, Citrus taiwanica and Murraya paniculata. Adults were examined for morphometric variation using traditional and geometric analysis based on 12 traits or landmarks. ACP reared on C. taiwanica were consistently smaller than those reared on the other plant species. Wing aspect ratio also differed between C. maxima and C. taiwanica. Significant differences in shape were detected with those reared on M. paniculata having narrower wings than those reared on C. macrophylla. This study provides evidence of wing size and shape differences of ACP based on host plant species which potentially may impact dispersal. Further study is needed to determine if behavioral and physiological differences are associated with the observed phenotypic differences.

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Section: Discussionmentioning

confidence: 99%

Host plant affects morphometric variation ofDiaphorina citri(Hemiptera: Liviidae)

Paris

Allan

Hall

et al. 2016

PeerJ

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“…With the development of new techniques that enable the split application of N (e.g., fertigation), sap analysis may be a promising technique to support fertilizer recommendation throughout the crop cycle. In comparison with other techniques that evaluate leaf pigments and reflectance, sap analysis enables a quantitative examination of N content, and other nutrients can also be analyzed, such as phosphorus (P) and potassium (K) [9] [10]. The sap analysis technique is widely used in horticulture in Europe [12] and in perennial crops, such as citrus, in Brazil [9] [10].…”

Section: Resultsmentioning

confidence: 99%

“…In comparison with other techniques that evaluate leaf pigments and reflectance, sap analysis enables a quantitative examination of N content, and other nutrients can also be analyzed, such as phosphorus (P) and potassium (K) [9] [10]. The sap analysis technique is widely used in horticulture in Europe [12] and in perennial crops, such as citrus, in Brazil [9] [10]. This is the first study to analyze this technique in sugarcane.…”

Section: Resultsmentioning

confidence: 99%

“…In order to obtain the sap extract as described by Cadahía and Lucena [12], and adapted by Souza, Bôas [10], 30 young leaves were sampled per plot in the morning. Leaves were placed in paper bags and transported to the laboratory inside thermal boxes containing ice bags.…”

Section: Methodsmentioning

confidence: 99%

“…The use of sap analysis may be a suitable alternative to evaluate N status within sugarcane crops. The extraction of the liquid from the plant cell tissues, generically called sap extract, and its quantification in terms of nutrients has been successfully adopted for fertilizer management of horticultural and perennial fruit trees, such as citrus trees, in Brazil [9] [10].…”

Section: Introductionmentioning

confidence: 99%

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Evaluating Nitrogen Behavior in Sugarcane after Fertilization Using Leaf and Sap Extract Analyzes

Joris¹,

Souza²,

Montezano³

et al. 2014

AJPS

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Nitrogen (N) fertilization is important for sugarcane crops, for both agronomic and environmental reasons. Better use of N from fertilizer is required for crop management, and in order to achieve it, adequate N nutrition monitoring is necessary. Sap extract analysis is a sensitive technique that has been adopted in other crops to tackle this objective, and can be used for sugarcane. The aim of this study was to evaluate the behavior of N and the response of sugarcane after N fertilization, using sap and leaf tissue analysis. The study was undertaken in two experimental areas in 2012/2013 season, using ratoon cane, following application of 0, 50, 100, and 150 kg•ha −1 of N. The youngest visible leaves were sampled from sugarcane at five time points between 0 and 150 days after fertilization, to evaluate the nitrate, ammonium, and total N content of sap extract, and total N content of leaf tissue. At the first sampling point (30 days after N fertilizer application), mineral N in sap increased as a result of N fertilization in medium-textured soil, and remained high until 120 days after fertilization in clayey soil. The total N content of sap followed a similar behavior. Stalk yield was only observed to increase in sugarcane grown in the clayey soil. Sap analysis proved to be an efficient method for monitoring N status in sugarcane grown in different soil types.

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Nitrogen‐fertilizer forms affect the nitrogen‐use efficiency in fertigated citrus groves

Quaggio¹,

Souza²,

Zambrosi³

et al. 2014

J. Plant Nutr. Soil Sci.

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The fertigated area of the Brazilian citrus industry has grown rapidly during recent years, and an efficient management of nitrogen (N) application at these sites is required for sustainable citrus production. Therefore, a field trial with Valencia orange trees [Citrus sinensis (L.) Osbeck] on Swingle citrumelo rootstock (Citrus paradise Macfad. x Poncirus trifoliata L. Raf.) was conducted for 8 years to evaluate the effects of N rates (80, 160, 240 and 320 kg ha–1 y–1) applied by fertigation, either as ammonium nitrate (AN) or calcium nitrate (CN), on soil solution dynamics, fruit yield, nutritional status, and N‐use efficiency (NUE) of trees. The maximum fruit yield was reached with 240 kg N ha–1 for AN, whereas a linear response and greater fruit yield was observed for N supplied as CN. The NUE was reduced for both N forms with increasing N rates. However, the NUE for CN was 14 to 38% greater than the NUE for AN. The lower fruit yield and NUE for AN compared to CN‐treated trees was associated with the increased acidification of the soil solution with increased AN rates (pH ≤ 4.0). This limited nitrification resulted in a high ammonium (NH$ _4^+ $) concentration in the soil solution and a reduction in the net absorption of cations by the trees, particularly calcium (Ca). Due to the improved ion balance as well as the higher pH of the soil solution (pH ≥ 6.3) and diminished NH$ _4^+ $ availability, gains in both fruit yield and NUE in fertigated citrus groves in tropical soils can be obtained with the use of CN as a source of N.

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Nutrientes na seiva de plantas cítricas fertirrigadas

Cited by 15 publications

References 4 publications

Host plant affects morphometric variation ofDiaphorina citri(Hemiptera: Liviidae)

Host plant affects morphometric variation ofDiaphorina citri(Hemiptera: Liviidae)

Evaluating Nitrogen Behavior in Sugarcane after Fertilization Using Leaf and Sap Extract Analyzes

Nitrogen‐fertilizer forms affect the nitrogen‐use efficiency in fertigated citrus groves

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