Foliar Applications of Acids With and Without Feso4 to Control Iron Chlorosis in Pear

García-Laviña, P.; Álvarez‐Fernández, Ana; Abadı́a, Javier; Abadía, A.

doi:10.17660/actahortic.2002.594.24

Cited by 7 publications

(6 citation statements)

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“…Many practices can increase the Fe concentration of leaves by directly providing Fe through fertilization, increasing the Fe absorption ability of roots or mobilizing Fe in leaves [18,19,25]. We tested six practices and found that only F and FFe increased the Fe concentration of pear leaves (Figure 6A).…”

Section: Discussionmentioning

confidence: 96%

“…However, the efficiency of these strategies is variable and depends on the experimental conditions and plant species [15][16][17]. Foliar sprays of Fe(III)-DTPA and FeSO 4 temporarily increase the Fe level in pear leaves [18]. The application of Fe-EDDHA chelate increases Fe uptake by roots and its distribution to leaves in lemon trees and alleviates the chlorosis [13].…”

Section: Introductionmentioning

confidence: 99%

“…The application of Fe-EDDHA chelate increases Fe uptake by roots and its distribution to leaves in lemon trees and alleviates the chlorosis [13]. Moreover, these chelates are expensive and inevitably increase production costs [18].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Soil Aeration and Fertilization Practices on Alleviating Iron Deficiency Chlorosis in “Huangguan” Pears Grafted onto Quince A in Calcareous Soils

Zhao

Sun

et al. 2021

Horticulturae

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In North China, the high-quality pear cultivar “Huangguan” (Pyrus bretschneideri Rehd. cv), which is grafted onto dwarf quince A (Cydonia oblonga Mill. cv) rootstock and grown in calcareous soil, experiences severe iron (Fe) deficiency; this deficiency greatly constrains tree growth as well as fruit yield and quality. Therefore, we evaluated the effects of six practices for alleviating chlorosis caused by Fe deficiency in “Huangguan” grafted onto quince A (HG-QA). The practices included ridging with landscape fabric mulching as a control, flattening with landscape fabric mulching (FM), ridging without landscape fabric mulching (R), flattening without landscape fabric mulching (F), Fe fertilizer application in soil (SFe), foliar Fe application (FFe), and manure application (M). The results showed that the leaf Fe concentration increased by 356% under FFe, compared to that under the control, but the practice failed to alleviate Fe deficiency chlorosis. In contrast, an increase in leaf Fe concentration and chlorosis alleviation were observed under F. F alleviated chlorosis mainly by increasing the root ferric-chelate reductase activity. These results indicate that Fe uptake and utilization in leaves are independent biochemical processes and soil aeration improvement have positive effect on increasing Fe uptake. M improved both the soil active Fe concentration and leaf Fe utilization. Thus, manure application should be the first choice for alleviating Fe deficiency chlorosis in HG-QA grown in calcareous soils. Combining manure application with other practices that increase Fe uptake would likely be an effective way to address the problem of Fe deficiency chlorosis.

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Effects of Soil Aeration and Fertilization Practices on Alleviating Iron Deficiency Chlorosis in “Huangguan” Pears Grafted onto Quince A in Calcareous Soils

Zhao

Sun

et al. 2021

Horticulturae

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“…Foliar Fe fertilization is a widespread agricultural strategy to control lime-induced iron chlorosis [68,85]. However, variable responses to Fe sprays have often been described, and foliar Fe fertilization cannot yet be considered a reliable strategy to control plant Fe deficiency [86,87]. Soil applications of iron sources have their own limitation.…”

Section: Microbes For Iron Chlorosis Remediationmentioning

confidence: 99%

Microbes for Iron Chlorosis Remediation in Peach

Singh¹

2020

Biostimulants in Plant Science

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Peach [Prunus persica (L.) Batsch] suffers from iron chlorosis when grown in calcareous soils due to low iron availability. Traditionally, soil and foliar application of ferrous sulphate, Fe-EDTA, Fe-EDDHA chelates, etc. is used as a corrective measure of chlorosis. The latter practice is quite effective. However, variable responses have been reported. Therefore, foliar spray cannot yet be considerd as a reliable method to control lime-induced chlorosis. Bioremediation constitutes innovative approaches for chlorosis correction. Iron fixations in calcareous soil, iron uptake by plants, and advance detection techniques and correction strategies in plants for iron chlorosis have been discussed in this chapter. The microbe-mediated correction strategies are identified as eco-friendly.

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“…Reducing the internal pH of Fe-chlorotic leaves with foliar applications of dilute acids such as sulfuric, citric, or ascorbic acid resulted in a decrease in the leaf apoplastic pH which favors reduction of the ferric (Fe 3+ ) to the ferrous (Fe 2+ ) form that is metabolized by the plant. Reducing the apoplastic pH of Fe-chlorotic leaves with foliar applications of these dilute acids, often combined with Fe sulfate (FeSO 4 ), resulted in a re-greening of leaves of some fruit crops including kiwifruit (Tagliavini et al, 1995;Rombolà et al, 2000), orange (Pestana et al, 2001), avocado (Crane et al, 2007b), carambola (Crane et al, 2007a), pear (Álvarez-Fernández et al, 2004;García-Laviña et al, 2002), and peach (Álvarez-Fernández et al, 2006;Tagliavini et al, 2000) growing in calcareous soil. Thus, the potential exists for the use of foliar applications of weak acids in combination with FeSO 4 as a low-cost alternative to applications of very expensive chelated Fe for preventing Fe deficiency in lychee trees growing in calcareous soils.…”

Section: Introductionmentioning

confidence: 99%

RE-GREENING OF LYCHEE (LITCHI CHINENSISSONN.) LEAVES WITH FOLIAR APPLICATIONS OF IRON SULFATE AND WEAK ACIDS

Schaffer

Crane

et al. 2011

Journal of Plant Nutrition

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2 Lychee (Litchi chinensis Sonn. cv. 'Mauritius') trees growing in calcareous soils are prone to iron (Fe) deficiency, typically prevented by soil application of chelated Fe, which is very expensive compared to iron sulfate (FeSO 4 ). Therefore, the effects of foliar applications of weak acids (ascorbic or dilute sulfuric acid), weak acids plus FeSO 4 , or a soil drench of chelated iron (Fe-EDDHA) on leaf chlorophyll index, leaf ferrous iron (Fe 2+ ) and total Fe concentrations, leaf gas exchange and plant dry weight were determined for 2-year-old lychee trees growing in calcareous soil in containers. Treatments were: foliar applications of ascorbic acid in deionized (DI) water plus surfactant, sulfuric acid in DI water plus surfactant, ascorbic acid in DI water plus FeSO 4 plus surfactant, sulfuric acid in DI water plus FeSO 4 plus surfactant, FeSO 4 in DI water plus surfactant, FeSO 4 in DI water with no surfactant, FeSO 4 in well water plus surfactant, sulfuric acid plus FeSO 4 in well water plus surfactant, surfactant in DI water. An additional treatment was chelated iron (Fe-EDDHA) applied to the soil. The organosilicone compound Freeway R was used as the surfactant. Well water was used instead of DI water in two treatments because fertilizers are often mixed with water from a well that typically has a pH much higher than that of DI water. Foliar treatments were applied at 4-week intervals for 24 weeks and chelated iron was applied to the soil at the time of first foliar treatments and 8 and 16 weeks later. There was generally no difference in leaf chlorophyll index among plants receiving chelated iron as a soil drench or foliar treatments containing FeSO 4 plus surfactant with or without organic acid. Foliar applications of acid with no FeSO 4 resulted in a lower leaf chlorophyll index than soil-applied Fe-EDDHA or any of the foliar treatments containing FeSO 4 plus surfactant. Leaf total Fe and Fe 2+ concentrations were generally highest for plants in the soil-applied Fe-EDDHA treatment and all foliar application treatments containing FeSO 4 plus surfactant. Net CO 2 assimilation (A net ), stomatal conductance (g s ), transpiration (Tr) and leaf, stem, root and total plant dry weights were highest for plants treated with soil-applied Fe-EDDHA or foliarly applied FeSO 4 with no surfactant. Further studies indicated that the surfactant Freeway R inhibits leaf gas exchange and plant growth. The results indicate that foliar applications of FeSO 4 are almost as effective as soil applications of chelated Fe for eliminating or preventing Fe deficiency symptoms of lychee trees growing in calcareous soil. While the addition of a surfactant to the foliar spray mixture appears to be necessary for preventing Fe deficiency, care must be taken when selecting a surfactant for foliar applications of FeSO 4 to be sure that there are no negative effects on leaf gas exchange and plant growth.

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Foliar Applications of Acids With and Without Feso4 to Control Iron Chlorosis in Pear

Cited by 7 publications

References 0 publications

Effects of Soil Aeration and Fertilization Practices on Alleviating Iron Deficiency Chlorosis in “Huangguan” Pears Grafted onto Quince A in Calcareous Soils

Effects of Soil Aeration and Fertilization Practices on Alleviating Iron Deficiency Chlorosis in “Huangguan” Pears Grafted onto Quince A in Calcareous Soils

Microbes for Iron Chlorosis Remediation in Peach

RE-GREENING OF LYCHEE (LITCHI CHINENSISSONN.) LEAVES WITH FOLIAR APPLICATIONS OF IRON SULFATE AND WEAK ACIDS

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