Comparative evaluation of selected types of Piper longum (Linn.) in coconut plantations

Abstract

Comparative evaluation of five selected types of piper longum (Linn.) namely Cheematippali, Panniyur, Mala, Pattambi and Kaanjur was carried out in the Department of Agricultural Botany, College of Horticulture, Vellanikkara during the year 1990-92 with the objective to select the best type of piper longum in order to recommend for large scale cultivation after evaluating economic characters and active principles. Experiment was laid out in Randomised Block Design with five replications. Observations were recorded for twenty three vegetative characters, nine productive characters and total alkaloidal content in dried spikes of piper longum for all the five types. The study revealed that the five types of piper longum differed for eleven vegetative characters namely length of the longest stem, number of vegetative branches per stem, length of leaf, width of leaf, legth of petiole, spread of the plant, internodal length of main stem, number of spike bearing branches per stem and angle of insertion of spike bearing branch and for three productive characters namely number of spikes per spike bearing branch, yield of green spike and yield of dry spike at one or all of the stages for which observations were recoeded. Of the above characters for which the five types differed significantly eight characters showing high and significant correlation with yield were chosen for carrying out studies on intercorrelation among yield components and path analysis. Correlation studies and path analysis revealed that angle of insertion of spike bearing branch, number of stems per hill, number of spikes per spike bearing branch and number of spike bearing branches per stem and yield green spike were the most important characters influencing dry spike yield. The studies on the total alkaloidal content in dried spikes of piper longum revealed that though Panniyur recorded the maximum alkaloidal content in percentage, with respect to total alkaloidal out put from an unit area of land Cheematippali was found to be superior to Panniyur since dry spike yield per hectare of Cheematippali was significantly superior to Panniyur. Mala recorded the minimum alkaloidal content in the dried spikes. Cheematippali showed constistency superior performance for all the important characters at all the stages and could be recommended for large scale cultivation after multilocational trials. Kaanjur can also be considered as a promising type since only in a very few characters it failed to establish its superiority over Cheematippali. The type Mala was found to be consistently inferior to all other five types of piper longum for all the vegetative and productive characters studied.