Growth models and nutriente uptake curve of tomato BRS 1509 subjected to irrigation pulses

Carvalho, Diego Bexiga Moreira de; Souza, Angela Vacarro de; Neto, Francisco José Domingues; Iglesias, L.; Nogueira, Bianca Bueno; Zanetti, Willian Aparecido Leoti; Filho, Luís Roberto Almeida Gabriel; Putti, Fernando Ferrari

doi:10.1080/01904167.2020.1766067

Cited by 3 publications

(4 citation statements)

References 17 publications

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“…Although the differences between these 28-day cumulative release rates are not very large, the cumulative release rate curves of the cylindrical samples show an obvious S shape, which is preferable for the compatibility with the metabolic needs of plants. 39,40 The granular coated sample and water are separated only by a film of the coating material.…”

Section: Resultsmentioning

confidence: 99%

“…The calculated cumulative soil leaching rates for these samples are shown in Figure , and the cumulative dissolution rates of the U-21 phr, U-21 phr I, and U-21 phr II samples are 86.49, 79.97, and 81.68%, respectively. Although the differences between these 28-day cumulative release rates are not very large, the cumulative release rate curves of the cylindrical samples show an obvious S shape, which is preferable for the compatibility with the metabolic needs of plants. , The granular coated sample and water are separated only by a film of the coating material.…”

Section: Results and Discussionmentioning

confidence: 99%

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Low-Temperature Flowable Poly(lactic acid)/Polycaprolactone Blends for the Solvent-Free Preparation of Slow-Released Urea Fertilizer in a Thermal Shear Field

Xia

Zhang

Yang

et al. 2020

Ind. Eng. Chem. Res.

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This work reports a convenient and large-scale method for the preparation of slow-release urea by melt coating with modified poly(lactic acid) (PLA)/polycaprolactone blends at low temperatures. The simple process is environmentally friendly and solvent-free, which can realize the industrial production of coated fertilizers. After being modified by ferric chloride, the crystallinity and molecular weight of poly(lactic acid) (PLA) are greatly reduced and the melt fluidity of PLA is improved. The lowest melting flowable temperatures of the PLA-modified blend was decreased to 115 °C, enabling the melt coating of urea particles using a mechanical stirrer. Because of the good compatibility of PLA with urea, a complete coating layer was formed on the surface of the urea particles by simple mixing at 120 °C, and the change of coating content has a great impact on the release effect. For the slow-release urea melt-coated with 18 phr of the blend, the time of the maximum release rate was delayed significantly and the cumulative release rate was 80.63% after 28 days in soil column leaching. When the coated granular slow-release urea was hot-pressed into a large cylinder, the slow-release effect was further enhanced. Simultaneously, with the massive use of PLA, its waste disposal becomes especially important, preparation of slow-release urea by melt-coating in this environmentally friendly manner needs to adjust the molecular weight and crystallinity of PLA, and its performance requirements are low. The work in this paper may provide a new approach for the recycling and reuse of waste PLA.

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Section: Resultsmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Low-Temperature Flowable Poly(lactic acid)/Polycaprolactone Blends for the Solvent-Free Preparation of Slow-Released Urea Fertilizer in a Thermal Shear Field

Xia

Zhang

Yang

et al. 2020

Ind. Eng. Chem. Res.

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show abstract

“…Table 1 presents the fertilizers used and their respective amounts for the fertigation rates, applied throughout the experiment. Two periods of fertigation were adopted, the first being the plant development phase and the second when the first fruits appeared, and the fertilization was carried out according to [16,17]. Total soluble solids were determined using a direct measurement employing an Optech RMT model refractometer.…”

Section: Irrigation Managementmentioning

confidence: 99%

“…The levels of P, K, Ca, S, Mg, B, Cu, Fe, Mn, Mo, Ni and Zn were determined using an ICP-MS equipment. The total N content was determined by sulfuric digestion and by default a Kjeldhal distillation method, described elsewhere [17].…”

Section: Nutritional Analysismentioning

confidence: 99%

Productive and Physico-Chemical Parameters of Tomato Fruits Submitted to Fertigation Doses with Water Treated with Very Low-Frequency Electromagnetic Resonance Fields

Putti

Nogueira

Souza

et al. 2022

Plants

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It is known that poorly performed fertigation directly impacts on tomato production and biometric components. In addition, consumers are also affected by interrelated characteristics that interfere with the acceptability of the fruit, such as the physicochemical parameters and nutrients in the fruit. Thus, eco-friendly technologies, such as irrigation with ultra-low frequency electromagnetic treated-water, which attenuates the inadequate management of fertigation, are essential to improve marketable fruit yields. Thus, the objective of the present work was to investigate the impact of treated water with very low-frequency electromagnetic resonance fields in physical, chemical and nutritional parameters at different nutrient solution strengths in tomato fruits. In this study, experiments were carried out in randomized blocks and five doses of fertigation were used (1.5; 2.5; 4.0; 5.5; and 7.0 dS m−1), employing two types of water: electromagnetically treated and untreated. It can be seen that the fertigation affected some parameters, mainly the number of fruits with blossom-end rot, fruit size, and weight. Variance analysis (ANOVA) was performed with the subsequent use of the Tukey test. In all statistical tests, a confidence level of 95% was considered. The soluble solids content increased by 28% as a function of the fertigation doses. The electromagnetically treated water reduced the number of fruits with blossom-end rot by 35% (p < 0.05). Overall, electromagnetic water improved the physicochemical quality parameters and the nutritional status of tomato fruits. Thus, this study demonstrated that green technology could leverage tomato fruit production and quality.

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Effects of Water Deficit on Growth and Productivity in Tomato Crops Irrigated with Water Treated with Very Low-Frequency Electromagnetic Resonance Fields

Putti,

de Queiroz Barcelos,

Goes

et al. 2023

Plants

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The tomato crop is very sensitive to stress conditions. A water deficit is defined as when precipitation is less than the evapotranspiration (ETc) of the crop in a given period, and in this scenario of climate change, it is identified as responsible for global productivity losses. The use of potential technologies for better irrigation management, such as electromagnetically treated water, remains controversial. Thus, the objective of the present work was to investigate the effects of very low-frequency electromagnetic resonance field treatment on water for tomato crops submitted to different irrigation rates. For this, an experiment was carried out under controlled conditions with different types of water: electromagnetically treated water (WTVLF) and untreated water (UNW), as well as four water replacement rates: 40, 60, 80, and 100% ETc. The electromagnetic treatment of the water was carried out using the commercial equipment AQUA4D®. The experiment was carried out in pots with five replications per treatment. Lower activity of SOD, POD, CAT, and APX enzymes was observed in plants irrigated with water treated with very low-frequency electromagnetic resonance fields (WTVLF), indicating less oxidative stress caused by water deficit. Water deficit reduced chlorophyll content, but the effects were less harmful with WTVLF water. The water deficit resulted in less accumulation of dry matter and less productivity in a linear relationship. However, plants irrigated with WTVLF showed increments of about 20% in dry matter accumulation and 20% in fruit production concerning plants irrigated with untreated water, independent of the irrigation rates. We can conclude that irrigation with WTVLF can be a solution to reduce the damage caused by water deficits and increase the productivity of tomato crops.

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Growth models and nutriente uptake curve of tomato BRS 1509 subjected to irrigation pulses

Cited by 3 publications

References 17 publications

Low-Temperature Flowable Poly(lactic acid)/Polycaprolactone Blends for the Solvent-Free Preparation of Slow-Released Urea Fertilizer in a Thermal Shear Field

Low-Temperature Flowable Poly(lactic acid)/Polycaprolactone Blends for the Solvent-Free Preparation of Slow-Released Urea Fertilizer in a Thermal Shear Field

Productive and Physico-Chemical Parameters of Tomato Fruits Submitted to Fertigation Doses with Water Treated with Very Low-Frequency Electromagnetic Resonance Fields

Effects of Water Deficit on Growth and Productivity in Tomato Crops Irrigated with Water Treated with Very Low-Frequency Electromagnetic Resonance Fields

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