Integrated Nutrient Management in East Coast Tall Coconut

TL;DRAbstract

A field experiment was conducted during 2006-2009, on 29 years old East Coast Tall (ECT) coconut palms at Coconut Research Station, Veppankulam to explore the possibility of nitrogen substitution through organic manure. It was aimed to substitute 50 per cent of recommended nitrogen through organic manure. There were five treatments viz., T1 - Absolute control, T2 - Recommended NPK (560:320:1200 g/palm/year), T3 - 100% N as Composted Coir Pith (CCP) + balance PK as fertilizer, T4 - 50 % N as CCP + balance NPK as fertilizer and T5 - Neem cake (10 kg) + ash (20 kg), bonemeal (2kg). The experimental results proved that 50 % nitrogen substitution through organic manure (CCP) and remaining 50 % nitrogen through fertilizers (T4) recorded comparable mean annual nut yield (111 and 117 nuts / palm / year, respectively, in 2008 and 2009) and other yield contributing parameters viz., no. of functional leaves, no. of bunches and no. of female flowers, with 100% NPK through fertilizers (T2). However

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