Spacio-Temporal Fertigation Effects on Growth, Yield and Nutrient Use Efficiency of Elephant Foot Yam ( Amorphophallus paeoniifolius )

摘要

A field experiment was conducted for two consecutive years during 2013-14 and 2014-15 at theRegional Centre of ICAR-Central Tuber Crops Research Institute, Bhubaneswar, Odisha, India. The experimentwas laid out in split plot design with fertigation interval (2, 3 and 4 days) in the main plots and in sub plots therecommended fertilizer (Soluble fertilizer N- P2O5-K2O 120-60-120 kg ha ) was split into 30, 40 and 50 doses and1applied through drip irrigation. A Check [furrow irrigation where P2O5 60 kg ha was applied as basal and N-1K2O 120-120 kg ha were applied at 1 (40%), 2 (30%) and 3 (30%) month after planting (MAP) to soil] and1 st nd rdcontrol (no fertilizer) treatments were also included. All the treatments had three replications. The resultsrevealed that the plant height, canopy spread and pseudostem girth at 3rd and 5th MAP were the maximum intreatments which received maximum fertigation during that period. Corm yield increased with increase infertigation interval from 3 to 4 days along with fertilizers application in 40 to 50 split doses. However, the cropdid not respond to fertigation beyond 180 days after planting (DAP). The corm yield had significant positivecorrelation with N, P and K uptake. The fertigation at 4 days interval with application of recommended fertilizerssplit into 40 doses and fertigation at 3 days interval with application of recommended fertilizers into 50 dosesresulted in the maximum corm yield, nutrient (N, P and K) uptake and use efficiency (agronomic efficiency,recovery efficiency and partial factor productivity) in elephant foot yam.