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Keywords = enhanced nutritional program (ENP)

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10 pages, 928 KiB  
Review
Micronutrients Improve Growth and Development of HLB-Affected Citrus Trees in Florida
by Samuel Kwakye and Davie M. Kadyampakeni
Plants 2023, 12(1), 73; https://doi.org/10.3390/plants12010073 - 23 Dec 2022
Cited by 11 | Viewed by 4161
Abstract
Enhanced nutritional programs (ENPs) have improved citrus trees’ growth and development in the era of Huanglongbing (HLB). Studies conducted with variable rates of manganese (Mn) and Iron (Fe) on young HLB-affected citrus trees showed that applying double the standard recommendation increased growth and [...] Read more.
Enhanced nutritional programs (ENPs) have improved citrus trees’ growth and development in the era of Huanglongbing (HLB). Studies conducted with variable rates of manganese (Mn) and Iron (Fe) on young HLB-affected citrus trees showed that applying double the standard recommendation increased growth and biomass accumulation. Since HLB is believed to cause deficiency symptoms of micronutrients in citrus trees, it is critical to ensure their optimal levels in the leaves. This could be achieved by soil application of either a Mn rate of 8.9 to 11.5 kg ha−1 as MnSO4 (31%) for young HLB-affected ‘Valencia’ (Citrus sinensis (L.) Osbeck) citrus trees or an Fe rate of 9.6 to 11.8 kg ha−1 as Ferrous sulfate heptahydrate (20%) for ‘Bingo’ (Citrus reticulata, Blanco) citrus trees. Maintaining optimal levels of these micronutrients may enable citrus trees to carry out photosynthetic activities to ensure growth and development. It may also help the tree in the regulation of various physiological processes as part of the antioxidant enzyme Mn-superoxidase dismutase (SOD). Micronutrient manipulation through variable rates of fertilizer application to influence nutrient availability is an important mitigating factor for HLB-affected citrus trees and an integral component of citrus production in Florida. Full article
(This article belongs to the Special Issue Nutrient Management for Resilient Crop Production)
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