PERTANIKA JOURNAL OF TROPICAL AGRICULTURAL SCIENCE

Pigeon pea (Cajanus cajan) seeds are widely consumed as a staple food in numerous countries, with leaves recognized for various medicinal values, particularly in flavonoid production. Therefore, this study aimed to investigate leaf flavonoid production in pigeon peas through recurrent harvesting at different heights and the application of cow manure rate. The experiment was carried out in a Split Plot Design, with the main plot consisting of three levels of cow manure at 0, 15, and 30 tons/ha, while the subplots comprised no pruning, 100 and 125 cm above the ground. The findings indicated no observed interaction between cow manure and pruning concerning the variables studied. Recurrent harvesting with 30 tons of cow manure/ha produced a total leaf flavonoid of 2228.3 mg quercetin equivalent (QUE)/100 g leaf dry weight. It showed that 30 tons of cow manure/ha needed to be reapplied for three consecutive harvests since the value declined from the second to the third harvesting. Pruning at different heights above ground produced no significant differences in total leaf flavonoid per plant, with a range of 841.10–1,539.00 mg QUE/100 g leaf dry weight.

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