Manganese, zinc and boron deficiency in mango.
Agarwala S. C., Nautiyal B. D., Chatterjee C., Sharma C. P.
Author Affiliation: Department of Botany, Lucknow University, Lucknow, India.
Scientia Horticulturae 35 : 99-107
Abstract : Two-year-old saplings of mango cv. Dashehari veneer grafted on Deshi rootstocks were grown in washed sand and supplied with a complete nutrient solution or with solutions deficient in Mn, Zn and B. Two deficiency levels were examined in each case. The visible symptoms of Zn deficiency appeared first, and those of B and Mn appeared later. In both Zn and Mn deficiency, the young and middle leaves were affected but the symptoms were distinct from each other. The symptoms of B deficiency were first visible on the young leaves, then the apical growing point died and subsequently a large number of the secondary buds died. The concentrations of Mn, Zn and B were reduced in the leaves of deficient plants and decreased with increasing severity of the symptoms. After 124 weeks, leaf Mn, Zn and B concentrations were 3.8, 7.0 and 20 µg/g DM in acutely deficient plants. In comparable leaves from plants given complete nutrition, Mn, Zn and B were 22, 28 and 100 µg/g DM, respectively.