Effect of partial soil wetting on transpiration, vegetative growth and root system of young orange trees

Vellame, Lucas Melo; Júnior, Eusímio Felisbino Fraga; Coelho, Rubens Duarte

doi:10.1590/0103-9016-2013-0360

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…The percentage of the expected transpiration and soil matric potential were correlated through a segmented regression analysis, minimizing the root mean square error (RMSE) between the observed and the calculated transpiration percentages (Vellame et al, 2015), thus defining the soil matric potential from which there is a linear reduction in the expected transpiration. The values observed and estimated by the segmented regressions were correlated by linear regression and the Mayer et al test (1994).…”

Section: Ptrmentioning

confidence: 99%

Transpiration of young cocoa trees under soil water restriction

Fraga

Vellame

Oliveira

et al. 2021

Sci. agric. (Piracicaba, Braz.)

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Cocoa plantations in Brazil have been expanding beyond the borders of traditional regions by implementing a strategy based on irrigation and the establishment of crops exposed to full sunlight. The quantification of transpiration is essential to the establishment and management of crops, and is the main factor in the determination of water demand. This study had as its objective the estimating of transpiration of young cocoa trees as a function of reference evapotranspiration (ETo) and soil matric potential (Ψw). Two experiments were conducted, one in a greenhouse and the other in the field, using clones and seminal plants. Soil water content, plant transpiration and reference evapotranspiration were monitored. Cocoa trees were subjected to soil moisture reduction and their transpiration decreased linearly both in the field and in the greenhouse, due to decreases in the soil matric potential beyond a critical point. In the greenhouse average transpiration could be linearly estimated as a function of ETo when Ψw was higher than-24.89 kP. Drying soil conditions resulted in a reduction in transpiration by approximately a 2 % per unit decrease in Ψw. Under field conditions; clonal plant transpiration decreased linearly beyond the critical matric potential of-65.02 kPa, while in seminal plants this reduction occurred beyond-79.48 kPa. Clonal plants were more sensitive to soil water variations with average transpiration lower than that of seminal cocoa tree plants.

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Section: Ptrmentioning

confidence: 99%

Transpiration of young cocoa trees under soil water restriction

Fraga

Vellame

Oliveira

et al. 2021

Sci. agric. (Piracicaba, Braz.)

Self Cite

View full text Add to dashboard Cite

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Application of fertilizers and root enhancers by two irrigation systems on ‘BRS imperial’ pineapple

et al. 2022

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The objective of this work was to evaluate two irrigation systems, by drip and diffuser microjets, two types of fertigation, by spraying at the base of the plant and in the soil, and two types of root enhancers in the development and production of the pineapple ‘BRS Imperial’. The drip system promoted greater root development than the diffuser microjet system. Much of the root system was concentrated in the stalk and soil up to 0.1 m depth, where the drip system promoted a higher relative percentage of root growth in the stalk compared to the microjet. The root enhancers promoted greater root growth in the stalk than in the soil. The use of the root enhancers based on humic and fulvic acids was not significant, while the use of the root enhancers based on phosphoric acid and amines was significant for root growth only in the microjet system. Application of fertilizers by spraying at the base of the plant promoted root growth and increased yield compared to the use of fertigation. The drip system showed higher efficiency of crop and irrigation water productivity for ‘BRS Imperial’ pineapple.

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Effect of partial soil wetting on transpiration, vegetative growth and root system of young orange trees

Cited by 2 publications

References 23 publications

Transpiration of young cocoa trees under soil water restriction

Transpiration of young cocoa trees under soil water restriction

Application of fertilizers and root enhancers by two irrigation systems on ‘BRS imperial’ pineapple

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