ASSESSMENT OF CLIMATE CHANGE IMPACT ON RAIN WATER PRODUCTIVITY IN SEMI-ARID ALFISOL THROUGH AQUACROP MODEL IN MAIZE (Zea mays L.)

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dc.contributor.advisorDr. B. S. Polisgowdar, Dr. K. Srinivas Reddy, Dr. M S Ayyanagowdar
dc.contributor.authorBARIKARA UMESHA
dc.date.accessioned2020-01-11T06:01:57Z
dc.date.available2020-01-11T06:01:57Z
dc.date.issued2015-06-30
dc.description.abstractThe rainwater harvesting in the semi arid regions enhance the livelihoods of rainfed farmers by mitigating the dry spells under changing climate. The present study was laid out in a split-split plot statistical design with three replications. There were five main irrigation treatments viz., I0, I1, I2, I3, I4, two sub treatments viz., M0 (no mulching), M1 (mulching @ 5 t ha-1 with glyricidia) and two sub-sub treatments viz., NF (normal fertilizer) and HF (high fertilizer) to study the effect of supplemental irrigation and crop management practices on maize grain yield and water productivity in semi arid alfisols of Telangana state. The results of the present study showed that, the highest average grain yield of 3.19 t ha-1 was recorded in I4 and lowest was in I0 (1.78 t ha-1). The highest average water productivity (10.65 kg ha-1 mm-1) was recorded in I4 followed and the lowest was in I0 (7.60 kg ha-1 mm-1). The developed crop water production functions indicated that, the grain yield was increased with increase in depth of supplemental irrigation. The AquaCrop model was calibrated for simulation of grain yield, biomass and water productivity for all treatment levels and the prediction error statistics were 0.94 < E < 0.95 %, 0.06 <RMSE< 0.12 t ha-1 and 0.59 <MAE< 0.82 t ha−1. During the validation, model performed well with model efficiency of 91, 90 and 73 % for grain yield, biomass and water productivity respectively and is within the acceptable limits. Under the changing rainfall and air temperature, the maize grain yield in rainfall in rainfed condition can be sustained by application of supplemental irrigation of 50 mm with expected increase by 75, 80 and 85 per cent in time scenarios of 2020, 2050 and 2090 as compare to kharif 2013 in Rangareddy district of Telangana state.en_US
dc.identifier.citation250en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810140202
dc.keywordsRainfed, Aquacrop, Supplemental Irrigation, Maize, Climate change.en_US
dc.language.isoenen_US
dc.pages205en_US
dc.publisherUNIVERSITY OF AGRICULTURAL SCIENCES, RAICHURen_US
dc.research.problemASSESSMENT OF CLIMATE CHANGE IMPACT ON RAIN WATER PRODUCTIVITY IN SEMI-ARID ALFISOL THROUGH AQUACROP MODEL IN MAIZE (Zea mays L.)en_US
dc.subSoil and Water Engineeringen_US
dc.subjectnullen_US
dc.themeASSESSMENT OF CLIMATE CHANGE IMPACT ON RAIN WATER PRODUCTIVITY IN SEMI-ARID ALFISOL THROUGH AQUACROP MODEL IN MAIZE (Zea mays L.)en_US
dc.these.typePh.Den_US
dc.titleASSESSMENT OF CLIMATE CHANGE IMPACT ON RAIN WATER PRODUCTIVITY IN SEMI-ARID ALFISOL THROUGH AQUACROP MODEL IN MAIZE (Zea mays L.)en_US
dc.typeThesisen_US
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