Effect of deficiency of calcium, magnesium and sulphur on the uptake of other nutrients in mango.
Chaudhary S. K., Nauriyal J. P.
Author Affiliation: Department of Horticulture, Punjab Agricultural University, Ludhiana 141?004, India.
: 296-300
Abstract : One-year-old seedlings of mango cv. Dusheri [Dashehari?] were grown in sand culture and fed with (a) complete nutrient solution, and (b) low Ca (10 p.p.m.), (c) low Mg (11 p.p.m.) and (d) low S (4.5 p.p.m.) solutions containing adequate concentrations of other essential nutrients. Leaf samples were taken for analysis when slight and severe deficiency symptoms occurred. Severe Ca deficiency reduced leaf Ca (2.44% to 0.81%) and N (1.88% to 1.26%), but raised levels of K (0.95% to 1.60%) and B (64 to 112 p.p.m.). Severe Mg deficiency reduced leaf Mg (0.32% to 0.10%), but raised levels of K (0.95% to 1.40%) and B (64 to 155 p.p.m.). Severe S deficiency reduced leaf S (0.74% to 0.32%), Ca (2.44% to 1.96%) and Mn (59 to 33 p.p.m.), but increased levels of K (0.95% to 1.06%), B (64 to 135 p.p.m.), Cu (12 to 26 p.p.m.) and Fe (76 to 125 p.p.m.). Changes in leaf concentrations of other elements studied were not significant.