Effects of drip irrigation regimes and basin irrigation on Nagpur mandarin agronomical and physiological performance

Pravukalyan Panigrahi, A.K. Srivastava and A.D. Huchche

Agricultural Water Management, 2012, vol. 104, issue C, 79-88

Abstract: The scarcity of irrigation water is one of the major causes of low productivity and decline of citrus orchards. The present study was planned with a hypothesis that the drip irrigation (DI) could save a substantial amount of water over surface irrigation, besides improving the yield of citrus plants. The experiment was conducted for 3 seasons during 2006–2009, with ‘Nagpur’ mandarin (Citrus reticulata Blanco) plants budded on rough lemon (Citrus Jambhiri Lush) rootstock in central India. The effects of DI and basin irrigation (BI) on soil chemical properties and crop responses were studied. DI was scheduled every-other-day at 40%, 60%, 80% and 100% of the alternate day cumulative evaporation (Ecp) measured in Class-A evaporation pan. DI except irrigation at 40% Ecp proved superior to BI, producing more growth and fruit yield of plants. The higher plant growth was recorded with higher regime of DI. The maximum fruit yield in DI at 80% Ecp, using 29% less irrigation water resulted in 111% improvement in irrigation water productivity under this treatment over BI. The heavier fruits, with lower acidity and higher total soluble solids, were harvested in DI at 80% Ecp compared with BI. The significant variation of soil water content at 0–0.2m depth under DI indicated the confinement of effective root zone of the plants in top 0.2m soil. The maximum rate of net-photosynthesis, stomatal conductance and transpiration in leafs was recorded in DI at 100% Ecp. However, the plants under DI at 80% Ecp exhibited the highest leaf water use efficiency. The maximum salinity build-up with highest decrease in pH was observed in 0–0.2m soil under DI, whereas the salinity development was prominent in 0.4–0.6m soil with an increase in pH under BI. The gain in available macronutrients (N, P and K) and loss of micronutrients (Fe, Mn, Cu and Zn) in soil followed the similar trend of EC. The leaf nutrient (N, P, K, Fe, Mn, Cu and Zn) analysis revealed that DI produced significantly (P<0.05) higher concentration of macronutrients in leafs than that with basin-irrigated plants. However, the effect of irrigation on micronutrients in leafs was statistically insignificant. Overall, these results reveal that the application of optimum quantity of water through DI (80% Ecp) could impose desirable water stress on ‘Nagpur’ mandarin plants, improving their yield and fruit quality, without producing the higher vegetative growth.

Keywords: Citrus; Water management; Soil chemical changes; Leaf nutrient composition; Leaf physiology; Yield parameters (search for similar items in EconPapers)
Date: 2012
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:104:y:2012:i:c:p:79-88

DOI: 10.1016/j.agwat.2011.11.018

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