Impact of Micronutrients and Sea Weed Sap on Nutrient Availability and Leaf Nutrient Concentrations of Mango (Mangifera indica L.) CV. Dashehari in Mollisols of Uttarakhand
Ravina Pawar, A. K. Singh, K. P. Raverkar, Chiranjeev Kumawat, Johnson Lakra
Current Journal of Applied Science and Technology · pp. 1–10 · Published 27 Sep 2019
10.9734/cjast/2019/v37i530305Abstract
An investigation was undertaken to study the effect of micronutrients and sea weed sap on nutrient availability and leaf nutrient concentrations of mango cv. Dashehari in the year 2014-2015. The experiment was conducted in a randomized block design with three replications and ten treatments consisting of various concentrations and combinations of micronutrients, sea weed sap along with recommended dose of fertilizers in sub-tropical region of GBPUA&T, Pantnagar, Uttarakhand, India. The highest available soil nitrogen, phosphorus, potassium (195.51, 74.30 & 218.79 kg ha-1), B, Zn, Fe, Cu and Mn (1.41, 0.85, 16.78, 3.21 and 25.50 ppm) after harvest were observed with the application of RDF + IIHR Mango Special @ 5 g/l (2 sprays at two months before flowering and marble stage). RDF + IIHR Mango Special also increased the nitrogen, phosphorus, potassium (1.88, 0.99, 0.83 %); B, Zn, Fe, Cu and Mn (18.17, 69.29, 199.49, 48.89 and 84.40 ppm) in leaves of mango cv. Dashehari. Foliar application of sea weed sap @ 10% (2 sprays at panicle emergence and marble stage) + RDF + ZnSO4 @ 200 g + CuSO4 @ 100 g + Boric acid @ 100 g (soil application) per plant in basin after harvest, also resulted in enhanced status of nutrients in plants and soil over various treatments followed to RDF + IIHR Mango Special @ 5 g/l foliar application.
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