Influence of organic nutrients and humic acid on fruit yield and alkaloid content of thuduvalai (solanum trilobatum l.)

An experiment was undertaken to analyze the influence of organic nutrients and humic acid on fruit yield and alkaloid content of Thudhuvalai (Solanum trilobatum L.) in randomized block design replicated thrice with 13 treatments. Four different organic manures such as Farm yard manure @15, 17.5 and 20 t ha-1, vermicompost @ 2.5, 2.75 and 3 t ha-1, Coir pith compost @ 2.5, 2.75 and 3 t ha-1 t ha-1, Poultry manure @ 2.5, 2.75 and 3 t ha-1 along with Humic acid @ 0.1, 0.2, 0.3 per cent as foliar spray were studied under. The fruit yield parameters viz., number of flowers, number of fruits, fruit yield and alkaloid content were registered to be the highest in the treatment with application of Vermicompost (3 t ha-1) + Humic acid @ 0.3 per cent. Among the treatments, Vermicompost (3 t ha-1) along in addition with humic acid @ 0.3 per cent were found to be the best in increasing the fruit yield and alkaloid content in Thudhuvalai.