Open AccessManganese adsorption, availability, and uptake in citrus under microsprinkler irrigation
Author(s) -
Uthman Q. O.,
Kadyampakeni D. M.,
NkediKizza P.
Publication year - 2020
Publication title -
agrosystems, geosciences and environment
Language(s) - English
Resource type - Journals
ISSN - 2639-6696
DOI - 10.1002/agg2.20061
Subject(s) - manganese , soil water , sorption , irrigation , agronomy , environmental science , human fertilization , chemistry , adsorption , horticulture , soil science , biology , organic chemistry
Manganese deficiencies have been observed in shallow soils with high water tables and in well‐drained sandy soils of Florida. This study investigated Mn leaf uptake in citrus trees on a Florida sandy soil through modified Mn fertilization methods and rates. Tree rows were supplied with three N rates and Mn at single and double the recommended rates (recommended rate: 10.08 kg ha −1 ) using foliar and soil application methods. The double foliar application rate increased leaf Mn by 20% over the single application rate. The leaf concentration of Mn was within the optimum concentration, according to the IFAS guidelines for optimal leaf Mn concentration, for summer 2018 and winter 2019. The Mn sorption coefficient was 22 times higher at the 0‐ to 15‐cm depth compared with the 15‐ to 60‐cm soil depths. Thus, Mn would be retained in the top 0‐ to 15‐cm soil depth. An increase in the foliar application improved Mn concentration in leaves, whereas soil application limited Mn availability in the root zone for plant uptake.