Growth and yield of porang in agroforestry system with pruning and organic fertilizer treatment

¹ Department of Agrotechnology, Faculty of Agriculture, Universitas Sebelas Maret, Surakarta, 57126, Indonesia
² Department of Agribusiness, Vocational School, Sebelas Maret University, Surakarta, 57126, Indonesia

^* Corresponding author: mariatheresia@staff.uns.ac.id

Abstract

Temperature increases due to climate change reduce agricultural production, so adaptation through agroforestry cultivation systems is needed. This study aims to examine the effect of pruning and organic fertilizer on the growth and yield of porang in an agroforestry system. The research used a Randomized Block Design with a split plot pattern with two factors, namely pruning as the main plot and the type of organic fertilizer as a subplot. Pruning treatment with two levels: no pruning and 25% pruning. Organic fertilizer treatment with four levels: chemical fertilizer NPK (40-60-45) kg.ha^-1, organic fertilizer corncob, organic fertilizer Indigofera tinscotoria extraction waste, and organic fertilizer goat manure at a dose of 20 t.ha-1. The treatment was repeated three time. There was an interaction between pruning treatment and fertilizer type on the growth and yield of porang. The combination of no pruning and organic fertilizer from Indigofera tinctoria extraction waste resulted in the highest growth and yield, with tuber weight reaching 74.06 g. Organic Indigofera tinctoria fertilizer can increase the growth and productivity of porang in sengon agroforestry systems.