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ISHS Acta Horticulturae 735: I International Guava Symposium

CROP WATER REQUIREMENT OF GUAVA (PSIDIUM GUAJAVA L.) CV. KG/KAJI UNDER DRIP IRRIGATION AND PLASTIC MULCH

Authors:   B.K. Singh, K.N. Tiwari, S.K. Chourasia, S. Mandal
Keywords:   Psidium guajava, ring basin, evapotranspiration, economic analysis, benefit cost ratio
Abstract:
An experiment was conducted to estimate the water requirement of guava grown in lateritic soil, sub humid, sub tropical region under drip irrigation and plastic mulch condition. Actual evapotranspiration for guava was estimated by using Penman Monteith method (FAO 56). Yearly average water requirement of guava was estimated to be 206 mm after subtracting the effective rainfall. Irrigation was supplied to each plant using two emitters (online) of 4 L h-1 capacity. The analysis of data revealed 164 per cent greater yield in case of drip (VD) as compared to that of ring basin irrigation (VRB). The plastic mulch had significant influence on crop yield with all the levels of drip and ring basin methods of irrigations. The treatment VDM showed highest (47.2 t ha-1) yield followed by VD alone (37.7 t ha-1). The lowest yield (14.9 t ha-1) was observed in ring basin (VRB) irrigation method. Total annual income, benefit-cost ratio, net profit mm-1 of water used and water use efficiency was estimated and all these economic analysis parameters found to be highest for the treatment VDM. Total annual income from one hectare was found to be highest (INR 2,00,400) in case of treatment VDM followed by the treatment VD (INR 1, 52,700) and lowest for the treatment VRB (INR 57900). Treatment VDM resulted highest benefit-cost ratio (4.7) followed by the treatment VD (6.73) and least in the treatment VRB (2.16). The net profit from mm-1 of water used was found highest for the treatment VDM (INR 800.7) followed by the treatment 0.6 VDM (INR 617.2) and minimum in VRB (INR 164.5).
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