Irrigation Scheduling for Young ‘Hamlin’ Orange Trees in Florida

Davies, Frederick S.; Zalman, Glenn

doi:10.17660/actahortic.2000.537.69

Cited by 4 publications

(12 citation statements)

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“…Seasonal rates of growth in trunk diameter were similar to those reported by Davies et al (1996) for young 'Hamlin' orange trees on sour orange rootstock growing in Florida and tended to increase from year 1 to 3 in the field. For example, growth rates for C. volkameriana averaged 44 µm·d -1 in year 1; 78 µm·d -1 in year 2; and 140 µm·d -1 in year 3.…”

Section: Resultssupporting

confidence: 79%

Nitrogen, Rootstocks, and Growth of Young 'Rhode Red' Valencia Orange Trees

Davies¹,

Zalman²

2001

HortSci

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Several studies suggest that optimum N rate and application frequency differ among citrus rootstocks. 'Rhode Red' valencia orange trees [Citrus sinensis (L.) Osb.] on three rootstocks, C. volkameriana Ten. and Pasq., 'Carrizo' citrange [C. sinensis (L.) Osb. x Poncirus trifoliata (L.) Raf.], and 'Swingle' citrumelo [C. paradisi Macf. x P. trifoliata (L.) Raf.], were used to determine if N rate and application frequency should be adjusted, based on rootstock, during the first 3 years in the field. Treatments were arranged in a 3 × × × × × 3 × × × × × 3 (rootstock, N rates, N application frequency, respectively) factorial experiment. Annual N application rates ranged from 68 to 272 g/tree depending on tree age, and N was applied biweekly, weekly or monthly. Application frequency had no effect on trunk diameter or leaf N concentration in any year. Rootstock had a significant effect on growth in all 3 years, with trees on C. volkameriana being largest and having the greatest yields, followed by those on 'Carrizo' and 'Swingle', respectively. Trees on C. volkameriana were larger than those on the other rootstocks because they were larger at planting, grew over a longer period during the year, and often grew at a faster rate. Nitrogen rate had no effect on growth during the first 2 years in the field, but the highest N rate increased yields in year 3 for trees on C. volkameriana and 'Swingle' rootstocks. Interaction between rootstock and N rate was nonsignificant for trunk diameter, but it was significant for yield, suggesting that trees on C. volkameriana responded more to increased N than did those on the other rootstocks.

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Section: Resultssupporting

confidence: 79%

Nitrogen, Rootstocks, and Growth of Young 'Rhode Red' Valencia Orange Trees

Davies¹,

Zalman²

2001

HortSci

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“…This trend continued for the remainder of the season until 2 Dec. There was a highly significant linear increase in trunk diameter during the course of the study for all treatments, although the growth rate approached zero from November to December, as observed previously for young citrus trees in the field (Davies and Zalman, 2000).…”

supporting

confidence: 82%

Fertilization and Growth of Field-grown Citrus Nursery Trees in Florida

Davies¹,

Zalman²

2008

hortte

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The objective of this study was to determine the effects of various levels of nitrogen (N) on growth of ‘Hamlin’ orange (Citrus sinensis) trees on Carrizo citrange (C. sinensis × Poncirus trifoliata) rootstock in a field nursery. Newly budded liners were obtained from commercial nurseries and received from 0 to 3976 kg N per treated hectare annually (8N–0P–6.6K) in 14 applications per season. Tree trunk diameter, height, and dry weight were measured in two separate experiments. Total dry weight and trunk diameter were greatest for trees receiving 794 kg·ha−1 N annually during both seasons. However, annual N rates more than 1589 kg·ha−1 reduced trunk diameters and dry weight compared with the optimum N rate during both seasons. Leaf N concentration and N rate were positively correlated in both seasons, but leaf N concentration was poorly correlated with tree trunk diameter and dry weight. Therefore, very high rates of N fertilization may actually reduce ‘Hamlin’ orange tree growth in field nurseries when growing in an Arredondo fine sand.

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“…MARLER & DAVIES (1990) compararam o crescimento de laranjeiras 'Hamilin' com um ano de idade, mantidas a 20; 45 e 65% de esgotamento da água no solo, e observaram decréscimo do crescimento radicular e de ramos das plantas mantidas a 65%, enquanto os tratamentos com 20 e 45% não determinaram diferenças quanto ao crescimento vegetativo. DAVIES & ZALMAN (2000), estudando o efeito da irrigação em laranjeiras 'Hamilin' jovens na Flórida, verificaram que não houve diferenças no crescimento vegetativo quando as plantas foram mantidas entre 30 e 50% de esgotamento da água do solo. CASTEL & BUJ (1992) observaram redução do diâmetro do tronco e do índice de área foliar quando plantas de tangerineira 'Clementina' foram irrigadas com apenas 40% da evaporação do Tanque Classe A. Esses autores verificaram que o crescimento ótimo para os dois primeiros anos ocorreu com a aplicação semanal de 70% da água evaporada do tanque.…”

Section: Introductionunclassified

Crescimento de plantas jovens de limeira ácida 'Tahiti' sob lâminas de irrigação

et al. 2005

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RESUMO:Este estudo avaliou o efeito de lâminas de irrigação no crescimento vegetativo de limeira ácida 'Tahiti' (Citrus latifolia Tan) sob condições de campo. Os tratamentos consistiram de irrigações por gotejamento baseadas em 100% (T3) e 50% (T2) da evapotranspiração da cultura medida em lisímetro de pesagem e o tratamento sem irrigação (T1). O delineamento experimental foi inteiramente casualizado, com dez repetições. Mediram-se o diâmetro do caule e a altura das plantas mensalmente, ao passo que a área foliar, o volume e a projeção de copa foram determinados após 14 meses do início dos tratamentos. Medidas de assimilação de CO 2 , condutância estomática e potencial da água na folha foram realizadas para verificar o estado fisiológico das plantas em virtude dos tratamentos. Plantas irrigadas submetidas ao T3 apresentaram os maiores valores de área foliar, diâmetro de caule, altura de planta e projeção de copa. Valores intermediários dessas variáveis foram observados em T2, quando comparado ao T3 e ao T1. O menor desenvolvimento das plantas não irrigadas (T1) foi possivelmente causado pelos menores valores de condutância estomática e assimilação de CO 2 . PALAVRAS-CHAVE:Citrus latifolia Tan., manejo da irrigação, estresse hídrico. GROWTH OF YOUNG 'TAHITI' ACID LIME TREES UNDER IRRIGATION LEVELSABSTRACT: This study evaluated the effect of irrigation levels growth of young 'Tahiti' acid lime (Citrus latifolia Tan.) trees under field conditions. Treatments consisted of drip irrigation based on 100% (T3) and 50% (T2) of crop evapotranspiration measured by a weight lysimeter as well as nonirrigated plants (T1). The experiment was carried out in a completely randomized design with 10 replications. The trunk diameter and plant height were measured monthly, whereas the leaf area, the volume and the top of the tree projection were determined 14 months after setting treatments. Measurements of CO 2 assimilation, stomatal conductance and plant water potential were taken to verify the plant physiological status under the applied treatments. Irrigated plants submitted to T3 showed higher leaf area, trunk diameter, plant height and volume of tree projection. Intermediate values of these variables were observed in T2, compared to T3 and T1. The development of nonirrigated plants was probably impaired by low values of stomatal conductance and CO 2 assimilation.

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Irrigation Scheduling for Young ‘Hamlin’ Orange Trees in Florida

Cited by 4 publications

References 0 publications

Nitrogen, Rootstocks, and Growth of Young 'Rhode Red' Valencia Orange Trees

Nitrogen, Rootstocks, and Growth of Young 'Rhode Red' Valencia Orange Trees

Fertilization and Growth of Field-grown Citrus Nursery Trees in Florida

Crescimento de plantas jovens de limeira ácida 'Tahiti' sob lâminas de irrigação

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