Response of Olive Trees to Different Boron Application in Izmir and Mugla Province of Turkey

Deliboran, Aişe; Çilgin, İdris; Aydoğdu, Erol; Savran, M. Kerem; Dursun, Özgür; Dursun, Ozgur; PEKCAN, Tülin; Pekcan, Tülin; Turan, Hatice Sevim; Savran, Şule; Nacar, Abdullah Suat; Güngör, Ferişte Öztürk; Yildirim, Ayşen

doi:10.1080/00103624.2022.2046028

Cited by 5 publications

(7 citation statements)

References 31 publications

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“…Fruit ripeness, for instance, may affect several nutritional variables of olive fruits such as oil content, total soluble solids, total polyphenol and antioxidant activity [ 34 ]. In the present study, the olives from treatment B0 had lower dry matter values compared to the other treatments, which is consistent with the results reported by Delıboran et al [ 35 ], who found a decrease in olive dry matter in treatments in which B was not applied.…”

Section: Resultssupporting

confidence: 93%

Olive Yield and Physicochemical Properties of Olives and Oil in Response to Nutrient Application under Rainfed Conditions

Silva

Gonçalves²,

Martins

et al. 2023

Molecules

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The effects of mineral fertilizers on the physicochemical properties of olives and oil under rainfed conditions is scarce. In this three-year study, the results of a nitrogen (N), phosphorus (P), potassium (K) and boron (B) fertilization trial carried out in a young rainfed olive grove and arranged as a nutrient omission trial are reported. The control consisted of the application of N, P, K and B (NPKB) and four other treatments corresponded to the removal of one of them (N0, P0, K0 and B0). Olive yield and several variables associated with the physicochemical properties of olives and oil were evaluated. The NPKB treatment increased olive yield compared to the treatment that did not receive N (N0). Although dependent on the climate conditions of the crop season, the NPKB treatment increased fruit weight and the pulp/pit ratio and its fruits tended to accumulate more oil than K0. However, the phenolics concentrations on fruits and oil tended to be lower. All olive oil samples were classified in the “extra virgin” category and all showed a decrease in its stability between 3 and 15 months of storage, regardless of treatment, especially in N0, P0 and B0 treatments. The results of the sensorial analysis indicate that all the oils fell into the medium fruitiness and greenly-fruity category. Only in P0 and B0 were defects detected, namely muddy sediment. Thus, this study seems to indicate the importance of N application, but also a balanced nutrient application and that further studies are needed, given the difficulty in finding clear trends in the response of measured variables to fertilizer treatments.

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Section: Resultssupporting

confidence: 93%

Olive Yield and Physicochemical Properties of Olives and Oil in Response to Nutrient Application under Rainfed Conditions

Silva

Gonçalves²,

Martins

et al. 2023

Molecules

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“…Even though foliar boron application is often seen as more effective in improving plant nutrition, crop yield, and fruit quality than soil fertilization [30,31], the results did not confirm these observations. Foliar B application, either alone or in combination with soil fertilization, did not result in significant yield augmentation or the superior physiological performance of almond trees in any of the study years.…”

Section: Discussionmentioning

confidence: 79%

Effects of Foliar and Soil Boron Fertilization on Yield, Leaf Physiological Traits and Fruit Attributes in Rainfed Almond Orchards

et al. 2022

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Boron (B) fertilizers are recognized as essential for ensuring yield and fruit quality. However, the importance of soil and foliar B fertilization in almond orchards under rainfed conditions is presently unclear. To address this literature gap, in the present study, the impact of soil and foliar application of B on leaf gas exchange, leaf photosynthetic pigments, yield, and fruit quality in almonds was investigated across three consecutive growing seasons. Boron fertilizer was applied to the soil at four rates (0, 1, 2, and 3 kg ha−1) in the presence or absence of foliar application (0.36 g L−1) of the same micronutrient. Borax pentahydrate was used as the B source. When compared to foliar B fertilization, the soil application of B positively affected the gas exchange parameters, mainly the net CO2 assimilation rate, stomatal conductance, and transpiration rate (percentage of gain between 15% and 80%), but did not influence the chlorophyll content. The almond yield and fruit characteristics were also enhanced (about 25–72%) in response to lower soil B fertilization rates. In the 3 kg ha−1 dose, B had an adverse effect on the yield and resulted in lighter fruits. On the other hand, foliar B fertilization did not benefit any of the evaluated parameters. Overall, these results suggest that, under the studied conditions, almond orchards do not respond to higher B rates in soil or foliar B fertilization.

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“…İzmir has Mediterranean climate characteristics. The average annual air temperature and precipitation values recorded in the province are 17.5 °C and 713.8 mm, respectively (Delıboran et al, 2022 ).…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, the province is a significant agricultural center. According to the number of olive trees, the Aegean region has the largest share of the country (75%) and the province of İzmir accounts for 23% of this share (Delıboran et al, 2022 ). Some olive orchards in the province are irrigated with groundwater, while others are irrigated with the Gediz River, which is heavily polluted by domestic and industrial wastewater discharges.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of ecological and health risks of trace elements in soils of olive orchards and apportionment of their sources using the APCS-MLR receptor model

Deliboran,

Varol,

Aytop

2024

Environ Geochem Health

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Abstractİzmir, Turkey’s third most populous city, is in an important position in terms of both agriculture and industry. The province, which contributes 9.3% to the country’s industrial production, also has an important potential in terms of olive cultivation. However, until now, no research has been undertaken to analyze the content of trace elements (TEs) in the soil of olive orchards in İzmir. This study was carried out to determine the pollution level and ecological risks of TEs in the olive orchards soils of İzmir province, to reveal their potential sources and to evaluate their health risks. Among the TEs, the average content of only Ni (37.9 mg/kg) exceeded the world soil average content (29 mg/kg), while the average content of only Cd (0.176 mg/kg) exceeded the upper continental crust content (0.09 mg/kg). Enrichment factor revealed that there was significant enrichment for Cd in 73.6%, Ni in 11.6% and Cr in 5.4% of olive orchards, respectively, due to polluted irrigation water and agrochemicals. Similarly, ecological risk factor indicated that there were moderate and considerable ecological risks for Cd in 48.8% and 23.3% of olive orchards, respectively. Absolute principal component scores-multiple linear regression (APCS-MLR) model showed that Ni and Cr in the study area are affected by agricultural sources, Al, Co, Cu, Fe, Mn, Pb and Zn originate from lithogenic sources, and Cd originates from mixed sources. Based on health risk evaluation methods, non-carcinogenic and carcinogenic effects would not be expected for residents. This study provides significant knowledge for evaluating soil TE pollution in olive orchards and serves a model for source apportionment and human health risk evaluation of TEs in other agricultural regions.

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Response of Olive Trees to Different Boron Application in Izmir and Mugla Province of Turkey

Cited by 5 publications

References 31 publications

Olive Yield and Physicochemical Properties of Olives and Oil in Response to Nutrient Application under Rainfed Conditions

Olive Yield and Physicochemical Properties of Olives and Oil in Response to Nutrient Application under Rainfed Conditions

Effects of Foliar and Soil Boron Fertilization on Yield, Leaf Physiological Traits and Fruit Attributes in Rainfed Almond Orchards

Evaluation of ecological and health risks of trace elements in soils of olive orchards and apportionment of their sources using the APCS-MLR receptor model

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