Effect of humic, fulvic acid and calcium foliar application on growth and yield of tomato plants

摘要

This study was laid out to determine the effect of humic, fulvic acid and calcium foliar application on growth, yield and fruits quality of tomato plants. A field experimental in completely randomized block design with three replications was conducted at the Agricultural Experimental Station, Faculty of Agriculture, Ca iro University, Giza, Egypt. The tomato transplants, 'H9663' cultivar, were grown on clay soil during the 2013 and 2014 seasons. The individual and combination applications of humic acid (0.4 %), fulvic acid (4%) and chelated calcium (0.25 %) solutions wer e applied as foliar sprays on tomato plants at four times (after two, four, six and eight weeks from transplanting). Growth and nutrients content (N, P, K and Ca) of tomato plants as well as yield and fruits quality were investigated in treated and untreat ed plants. Results indicated that all foliar applications of humic, fulvic acid and calcium , either individual or in combinations, increased vegetative growth, yield and fruit quality. On the other hand, these treatments decreased the incidence of blossom end rot in tomato fruits. Foliar application of humic acid plus fulvic acid plus calcium gave the maximum values in the investigated properties. In conclusion, application of humic, fulvic acid and calcium as foliar application improved the plant growth, yield and fruits quality of tomato.