Determination of Water Potential on Mango Trees by Pressure Chamber

Castro, Mariana Tôrres de; Reinhardt, D. H. R. C.; Lêdo, Carlos Alberto da Silva

doi:10.17660/actahortic.2004.645.53

Cited by 8 publications

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“…The averages stem water potential (Ψ stem ) of plants of the eight treatments, during phases I, II and III of fruit growth, compared by the Tukey test at 5% probability, are shown in Table 4. It is observed that the values found for all treatments in this study ranged between -0.90 and -1.74 MPa, while the values found by CASTRO NETO et al (2004) ranged between -0.30 and -1.70 MPa for the soil water potential ranging between -0.20 and -1.60 MPa. Considering that the soil water potential, at 0.30 m deep, in the present study, ranged from 0 to -0.064 MPa (Figure 5), there is a disagreement of those, given the considerable difference between the values of soil water potential in both cases.…”

Section: Results E Discussionmentioning

confidence: 45%

“…Considering that the soil water potential, at 0.30 m deep, in the present study, ranged from 0 to -0.064 MPa (Figure 5), there is a disagreement of those, given the considerable difference between the values of soil water potential in both cases. This can be attributed to the time of determination of stem water potential, which in this study occurred between 13 and 14 hours, whereas in the study conducted by CASTRO NETO et al (2004) it occurred at 8 o'clock in the morning. In the first case, despite the high soil water potential, the reduced values of stem water potential are associated with the maximum degree of dehydration achieved by the plant on a given day, which is called minimum leaf potential (Ψmin), and usually occurs shortly after the midday sun.…”

Section: Results E Discussionmentioning

confidence: 64%

“…For this, three branches were removed from each treatment of the irrigated area by microsprinkling. The branches had between 5 and 10 leafs, had always between 4 and 6 mm in diameter, middle aged, were always taken in the position of the crown exposed to sunlight, between 1.5 and 1.8 meters above the ground, according to the procedure followed by CASTRO NETO et al (2004).…”

Section: Methodsmentioning

confidence: 99%

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Regulated deficit irrigation and tommy atkins mango orchard productivity under microsprinkling in brazilian semi arid

et al. 2011

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ABSTRACT:This study aimed to test controlled levels of water deficiency in soil in mango trees, under microsprinkling irrigation, in semi-arid conditions, and to evaluate its effect in the productivity and fruits quality. The deficits were applied in the phases I, II and III of growth of the fruit, during the productive cycles of the mango tree in 2006 and 2007. The experiment in both cases was arranged in an entirely random design with 10 treatments and 3 repetitions, in the year I, and with 8 treatments and 3 repetitions in the year II. The values of soil water potential, of the treatments submitted to regulated deficit irrigation (RDI), were placed in the range of 0 to -0.011 MPa, showing that the soil humidity varied between the saturation and the field capacity, not characterizing deficit water condition. The average values of stem water potential (Ψ stem ) varied between -0.90 and -1.74 MPa, evidencing significant effect (p <0.05) just for T1 (without irrigation), T7 and T8 (RDI with 30% of the ETc in the phases II and III, respectively). Through the variance analysis, significant differences were not verified among productivity, number of fruits per plant and size of the fruit, in none of the experiments, what indicates the possibility of reduction of the water use in the irrigation of the mango tree without significant losses of productivity and fruit quality.KEYWORDS: mango, irrigation management, water use optimization. IRRIGAÇÃO COM DÉFICIT REGULADO E PRODUTIVIDADE DE MANGUEIRA TOMMY ATKINS, SOB MICROASPERSÃO, NO SEMIÁRIDORESUMO: Este trabalho teve o objetivo de testar níveis controlados de deficiência de água no solo em mangueira irrigada por microaspersão, no semi-árido, e avaliar seu efeito na produtividade e qualidade dos frutos. Os déficits foram aplicados nas fases I, II e III de crescimento do fruto, durante os ciclos produtivos da cultura da mangueira, nos anos de 2006 e 2007. O delineamento experimental, em ambos os casos, foi o inteiramente casualizado, com dez tratamentos e três repetições, no ano I, e com oito tratamentos e três repetições, no ano II. Os valores de potencial de água no solo, dos tratamentos submetidos à irrigação com déficit regulado (RDI), situaram-se na faixa de 0 a -0,011 MPa mostrando que a umidade do solo variou entre a saturação e a capacidade de campo, não caracterizando condição de déficit hídrico. Os valores médios de potencial hídrico do ramo (Ψ stem ) variaram entre -0,90 e -1,74 MPa, mostrando efeito significativo apenas para T1 (sem irrigação), T7 e T8 (RDI com 30% da ETc nas fases II e III, respectivamente). Por meio da análise de variância, não foram constatadas diferenças significativas entre produtividade, número de frutos por planta e tamanho do fruto, em nenhum dos experimentos, o que indica a possibilidade de redução do uso de água na irrigação da cultura sem perdas significativas de produtividade e qualidade do fruto.

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Section: Results E Discussionmentioning

confidence: 45%

Section: Results E Discussionmentioning

confidence: 64%

Section: Methodsmentioning

confidence: 99%

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Regulated deficit irrigation and tommy atkins mango orchard productivity under microsprinkling in brazilian semi arid

et al. 2011

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“…Thus, water stress reduces the growth rate of different plant organs, disturbs the plantwater relationship, and reduces water use efficiency. Cotrim et al (2011) determined Ψ stem values at midday ranging between − 0.90 and − 1.74 MPa for non-stressed and water-stressed trees, respectively, while Castro et al (2004) recorded leaf petiole values between − 0.30 and − 1.70 MPa and Lima (2004) determined Ψ leaf within a greater range from -0.30 to − 1.73 MPa. Pavel et al (2003) reported that Ψ stem values for non-stressed mango trees fluctuated between − 0.4 and − 0.6 MPa over the season in a subtropical climate, and the stress responses to water deficits were detected first by Ψ stem , followed by g S , indicating that they are more sensitive stress indicators than A N .…”

Section: Bhriguvanshi Et Al (2015)mentioning

confidence: 97%

Deficit irrigation strategies for subtropical mango farming. A review

Zuazo

García-Tejero

Rodríguez

et al. 2021

Agron. Sustain. Dev.

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Mango (Mangifera indica L.) is broadly grown in tropical regions and can also be cultivated in irrigated subtropical semi-arid areas; however, water shortages are a serious problem in the latter region. Among biotic and abiotic factors, water supply is one of the most crucial elements that determine productivity. The allocation of water will be an ever-increasing source of pressure because of vast agricultural demands under changing climatic conditions. Although the mango is considered to be tolerant to drought, water stress during growing cycle can reduce productivity. Here, we review the recent progress in evaluating and augmenting mango water productivity. Developments in physiological and agronomic understanding that have led to a boost in water productivity are presented. In addition, this review deals with deficit irrigation strategies to elucidate the effects on mango yield, water use efficiency, and the response of physiological indicators to water stress. Our main findings were as follows: (1) Under a changing climate, traditional irrigation based on water balance will not be sustainable in the medium/long term; (2) deficit irrigation strategies applied to mango can save irrigation water by up to 40% and improve water use efficiency by up to 30%; and (3) there is valuable potential for further improvement owing to advanced knowledge in terms of the physiological response of mango to water stress, and there are good prospects within the current approaches if they are associated with specific environmental physiology. We concluded that under current medium-/long-term perspectives regarding available water resources, particularly in arid and semi-arid regions, there is an urgent demand for adaptive and water-saving strategies. Thus, it will be vital to redesign irrigation schemes in areas where water is scarce to adjust deficit irrigation strategies not only to save water, enhance water use efficiency, and maintain yield, but also to produce fruits with improved quality.

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“…As amostras foram retiradas em três ramos de cada tratamento da área irrigada por gotejamento. Os ramos continham entre 5 e 10 folhas, apresentavam sempre entre 4 e 6 mm de diâmetro, com idade intermediária, retirados sempre em posição da copa exposta ao sol, entre 1,5 e 1,8 metros do solo, conforme procedimento realizado por Castro Neto et al (2004).…”

Section: Methodsunclassified

Irrigação Com Déficit Controlado E Produtividade De Mangueira ‘Tommy Atkins’ Sob Gotejamento

Cotrim

Coelho

Silva

et al. 2017

RBAI

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RESUMOObjetivou-se com este trabalho avaliar diferentes níveis de déficit hídrico controlado no solo em mangueira 'Tommy Atkins' irrigada por gotejamento no semiárido e seu efeito na produtividade, eficiência de uso da água e no potencial hídrico do ramo. Os déficits foram aplicados durante as fases de desenvolvimento do fruto. O delineamento experimental foi inteiramente casualizado com 10 tratamentos e cinco repetições, no ciclo 1, e com 8 tratamentos e 4 repetições no ciclo 2 de avaliação. Os valores de potencial de água no solo, nos tratamentos submetidos à irrigação com déficit controlado (RDI), situaram na faixa de 0 a -0,010 MPa, mostrando que a umidade do solo variou entre a saturação e a capacidade de campo, enquanto os valores médios de potencial hídrico no ramo (Ψstem) variaram entre -0,83 e -1,62 MPa, sendo os menores valores nos ramos das plantas não irrigadas e nas plantas com RDI de 30% da ETc nas fases II e III. A produtividade, número de frutos por planta e tamanho do fruto não diferiram entre os tratamentos, o que possibilita redução do uso de água na irrigação da cultura sem perdas significativas de produtividade e qualidade do fruto.Palavras-Chaves: estratégias de irrigação, manejo de irrigação, eficiência de uso da água. REGULATED DEFICIT IRRIGATION AND 'TOMMY ATKINS' MANGO CROP PRODUCTIVITY UNDER DRIP ABSTRACTThe objective of this work was to evaluate different levels of controlled soil water deficit in 'Tommy Atkins' mango crop irrigated by drip irrigation in the semiarid region and its effect on yield, water use efficiency and water potential in the shoot. Deficits were applied during the development stages of the fruit. The experimental design was completely randomized with 10 treatments and five replications in first cycle and with 8 treatments and 4 replications in second

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Determination of Water Potential on Mango Trees by Pressure Chamber

Cited by 8 publications

References 0 publications

Regulated deficit irrigation and tommy atkins mango orchard productivity under microsprinkling in brazilian semi arid

Regulated deficit irrigation and tommy atkins mango orchard productivity under microsprinkling in brazilian semi arid

Deficit irrigation strategies for subtropical mango farming. A review

Irrigação Com Déficit Controlado E Produtividade De Mangueira ‘Tommy Atkins’ Sob Gotejamento

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