Sweet orange trees grafted on selected rootstocks fertilized with nitrogen, phosphorus and potassium

Quaggio, J. A.; Mattos, Dirceu; Cantarella, Heitor; Stuchi, Eduardo Sanches; Sempionato, O. R.

doi:10.1590/s0100-204x2004000100008

Cited by 18 publications

(8 citation statements)

References 8 publications

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“…Reese and Koo [8,9] observed that yield of Hamlin, Pineapple and Valencia sweet oranges on Rough lemon rootstock were maximized at a N rate of 202 kg·ha -1 . In the present study, Pêra was grafted on Cleopatra mandarin while Valencia was grafted on Rangpur lime rootstock, therefore the greater response to N fertilization could be related to the differential nutrient demand of rootstock varieties, as recently reported [22,23]. Mattos Jr. [22] demonstrated that N response of sweet orange trees on Cleopatra was significantly greater than those on Rangpur lime.…”

Section: Nitrogen Effectssupporting

confidence: 57%

“…Four-to sixmonth-old spring flush leaves were sampled from fruiting terminals and analyzed for total nutrient concentrations, according to Bataglia et al [21]. 23 = constant for the P × K interaction. If, for example, one nutrient did not significantly affect the dependent variable, it was held constant so that the model could be simplified as a response function for two nutrients.…”

Section: Methodsmentioning

confidence: 99%

“…drought-resistant and more efficient at using nutrients than the former [23,24]. Probably the rootstock plays a more major role in determining the response of citrus trees to N fertilization than orange cultivars.…”

Section: Ja Quaggio Et Almentioning

confidence: 99%

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Fruit yield and quality of sweet oranges affected by nitrogen, phosphorus and potassium fertilization in tropical soils

Quaggio

Mattos

Cantarella

2006

Fruits

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Fruit yield and quality of sweet oranges affected by nitrogen, phosphorus and potassium fertilization in tropical soils.Abstract --Introduction. The objective of the present paper was to evaluate the effects of N, P and K, and their interactions, on fruit yield and quality of two sweet orange varieties, Valencia and Pêra, grown on tropical soils in the State of São Paulo, Brazil, over four seasons. Materials and methods. Two experiments were set up in a fractional factorial design of the ½ (4 × 4 × 4) type, with four rates of N [(30, 100, 170 and 240) . Pour cette même variable, la réponse à la fertilisation de ces deux cultivars avec P et K a dépendu de la disponibilité en éléments nutritifs de sol. Le calibre des fruits de Valencia a été nettement affecté par des doses de K supérieures à 225 kg·ha -1 . Le rendement en solides solubles par boîte de fruits (40,8 kg) a diminué en même temps que la teneur en K des feuilles variait de (10 à 12) g·kg -1 . Conclusion. Les analyses de sols et de feuilles ont un rôle déterminant sur la définition du rendement et de la qualité des agrumes. Les programmes nutritionnels optimaux peuvent varier selon que la récolte est destinée à l'industrie du jus ou au marché du fruit frais.Brésil / Citrus sinensis / besoin nutritionnel / fertilisation / dose d'application / rendement / qualité / fruits

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Section: Nitrogen Effectssupporting

confidence: 57%

Section: Methodsmentioning

confidence: 99%

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Fruit yield and quality of sweet oranges affected by nitrogen, phosphorus and potassium fertilization in tropical soils

Quaggio

Mattos

Cantarella

2006

Fruits

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“…Also, given the relationship between canopy volume and citrus yield (QUAGGIO et al, 2004), the potential of ultrasonic sensors to measure tree canopies and produce yield maps is verified . Okamoto and Lee (2009) used an innovative method for detailed survey of citrus yield.…”

Section: Yield Mapping Soil Fertility and Tree Introductionmentioning

confidence: 99%

Yield mapping, soil fertility and tree gaps in an orange orchard

Molin

Colaço²,

Carlos³

et al. 2012

Rev. Bras. Frutic.

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ABSTRACT-The current high competition on Citrus industry demands from growers new management technologies for superior efficiency and sustainability. In this context, precision agriculture (PA) has developed techniques based on yield mapping and management systems that recognize field spatial variability, which contribute to increase profitability of commercial crops. Because spatial variability is often not perceived the orange orchards are still managed as uniform and adoption of PA technology on citrus farms is low. Thus, the objective of the present study was to characterize the spatial variability of three factors: fruit yield, soil fertility and occurrence of plant gaps caused by either citrus blight or huanglongbing (HLB) in a commercial Valencia orchard in Brotas, São Paulo State, Brazil. Data from volume, geographic coordinates and representative area of the bags used on harvest were recorded to generate yield points that were then interpolated to produce the yield map. Soil chemical characteristics were studied by analyzing samples collected along planting rows and inter-rows in 24 points distributed in the field. A map of density of tree gaps was produced by georeferencing individual gaps and later by counting the number of gaps within 500 m² cells. Data were submitted to statistical and geostatistical analyses. A t test was used to compare means of soil chemical characteristics between sampling regions. High variation on yield and density of tree gaps was observed from the maps. It was also demonstrated overlapping regions of high density of plant absence and low fruit yield. Soil fertility varied depending on the sampling region in the orchard. The spatial variability found on yield, soil fertility and on disease occurrence demonstrated the importance to adopt site specific nutrient management and disease control as tools to guarantee efficiency of fruit production. Index terms: Precision agriculture, spatial variability, citrus blight, huanglongbing (HLB). MAPEAMENTO DA PRODUTIVIDADE, FERTILIDADE DO SOLO E FALHAS DE PLANTAS EM POMAR DE LARANJEIRASRESUMO -A atual competitividade existente no setor citrícola demanda dos produtores novas estratégias de manejo para aumento de eficiência e sustentabilidade. Nesse sentido, a agricultura de precisão (AP) tem desenvolvido técnicas baseadas no mapeamento de produtividade e sistemas de manejos que reconheçam a variabilidade espacial existente no campo, o que contribui para aumentar a lucratividade de pomares comerciais. Como a variabilidade espacial normalmente não é visualizada, os pomares ainda são manejados como uniformes, e a adoção das tecnologias de AP nas fazendas citrícolas é baixa. Dessa forma, o objetivo do trabalho foi carcaterizar a variabilidade espacial de três fatores: produtividade de frutos, fertilidade do solo e ocorrência de falhas de plantas causadas pelo declínio dos citros e pelo (HLB), em um talhão comercial de citros em Brotas-SP. Dados de volume, coordenadas geográficas e área de representação dos sacolões utilizados na colheita fora...

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“…Esses resultados são semelhantes ao observado por Quaggio et al (2004) De maneira geral, notou-se na Figura 13 que as maiores probabilidades de germinação e viabilidade dos grãos de pólen estão associadas às plantas de "x11" enxertadas sobre "Cravo", em todas as épocas de poda (Anexo F). Na estimativa da viabilidade dos grãos de pólen, considerável presença de grãos viáveis foi observada na época de poda de inverno, com valores de 92% e 90% de polens viáveis em plantas "x11" enxertadas em "Cravo" e "Swingle".…”

Section: Comprimento Dos Ramos Novos E Número De Folhas/ramounclassified

Caracterização fenotípica e avaliação da expressão de genes envolvidos na indução e no florescimento da laranjeira 'x11'

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Sweet orange trees grafted on selected rootstocks fertilized with nitrogen, phosphorus and potassium

Cited by 18 publications

References 8 publications

Fruit yield and quality of sweet oranges affected by nitrogen, phosphorus and potassium fertilization in tropical soils

Fruit yield and quality of sweet oranges affected by nitrogen, phosphorus and potassium fertilization in tropical soils

Yield mapping, soil fertility and tree gaps in an orange orchard

Caracterização fenotípica e avaliação da expressão de genes envolvidos na indução e no florescimento da laranjeira 'x11'

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