Effect of drip irrigation and fertigation on yield, water and fertilizer-use efficiency and economics of greater yam (Dioscorea alata) in eastern India
Keywords:
Greater yam, Drip irrigation, Fertigation, Water use efficiency, Eastern IndiaAbstract
An experiment was conducted to see the effect of drip irrigation and fertigation on greater yam (Dioscorea alata L.) during 2020-21, 2021-22 and 2022-23 at the Regional Centre of ICAR-Central Tuber Crops Research Institute, Bhubaneswar, Odisha, in split plot design with drip irrigation levels in main plots (I1-60% CPE, I2-80% CPE and I3-100% CPE) and in sub-plots fertigation levels (F1- N- P2O5-K2O 60-60-60 kg ha-1, F2- N- P2O5-K2O 80-60-80 kg ha-1 and F3- N- P2O5-K2O 100-60-100 kg ha-1). Check: (surface irrigation IW/CPE: 1.0; P2O5 60 kg ha-1 basal application; N-K2O 80-80 kg ha-1 soil application at basal (40%), 30 (30%) and 60 (30%) days after planting) and control: (surface irrigation IW/CPE: 1.0; no fertilizer) also included to compare the treatments. The treatment I3 resulted in higher tuber yield, cost of cultivation, gross return, net return and B:C ratio, however, it was statistically on a par with I2. Among fertigation, treatment F3 resulted in significantly higher tuber yield, cost of cultivation, gross return, net return and B:C ratio. The interaction treatment I3F3 resulted in higher tuber yield, gross and net returns as well as B:C ratio and it was statistically on a par with I2F3 and I3F2. The treatment I2F3 resulted in higher water-use efficiency (WUE) and fertilizer-use efficiency (FUE). Hence, treatment I2F3 can be recommended for optimum tuber yield, higher WUE and FUE and better returns.
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