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Assessing impacts of projected climate on pigeonpea crop at Gulbarga

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Relation http://oar.icrisat.org/10548/
 
Title Assessing impacts of projected climate on pigeonpea crop at Gulbarga
 
Creator Rao, A V R K
Wani, S P
Srinivas, K
Singh, P
Bairagi, S D
Ramadevi, O
 
Subject Karnataka
Pigeonpea
Climate Change
 
Description Pigeonpea [Cajanus cajan(L.) Millsp] is an important semi-arid legume crop in India. In Karnataka, pigeonpea
is largely grown in the northern parts of the state especially in Gulbarga, which is called “Pulse Bowl of
Karnataka”. Climate change is one of the major challenges being faced by agriculture in the Semi-Arid Tropics
(SAT) of the country. Pigeonpea productivity in Gulbarga is affected by large variations in rainfall amount and
distribution, increased temperatures, depleting soil productivity and disturbing water balance. Based on daily
weather data of 41 years (1969-2009), productivity and water use of pigeonpea under eleven climate scenarios
are assessed using the pigeonpea model in Agricultural Production Systems Simulator (APSIM). Simulations
are done with automatic sowing based on rainfall and soil moisture availability during the sowing window (15
Jun to 20 Aug) and following recommended crop management practices. Simulations show that increase in
temperature by 2°C could reduce pigeonpea yields by about 16%. Rainfall decrease of 10% from present
coupled with 2°C increase in temperature could reduce yields further by 4%, making the total reduction to be
at 20%. Crop duration was shortened by about 10 days and water use reduced by 25 mm with increase in
temperature. Increased rainfall scenarios have considerably reduced the adverse effects of higher temperature.
Breeding of varieties tolerant to higher temperature and adoption of better water management (both in-situ
and ex-situ) practices achieved through integrated watershed approach could play a major role in sustaining
pigeonpea productivity under future climate scenarios.
 
Publisher Association of Agrometeorologists
 
Date 2013-12
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/10548/1/Kesava_Wani_Climate_Change_Pigeonpea_APSIM_Model.pdf
Rao, A V R K and Wani, S P and Srinivas, K and Singh, P and Bairagi, S D and Ramadevi, O (2013) Assessing impacts of projected climate on pigeonpea crop at Gulbarga. Journal of Agrometeorology, 15. pp. 32-37. ISSN 0972-1665