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Estimation of evapotranspiration and crop co-efficient of carrot (Daucus carota) forwater management using weighing lysimeter

Indian Agricultural Research Journals

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Title Estimation of evapotranspiration and crop co-efficient of carrot (Daucus carota) forwater management using weighing lysimeter
 
Creator SAHOO, D C
MADHU, M
KHOLA, OP S
 
Subject Carrot; Crop co-efficient; Evapotranspiration; Lysimeter
 
Description ABSTRACT An experiment was carried out during 2006 and 2007 to find out the crop evapotranspiration (ETc) rate of carrot (Daucus carota) using weighing type lysimeter at Udhagamandalam. Reference crop evapotranspiration (ET0) for the growing period was worked out by FAO Penman–Monteith (FAO 56–PM) equation using daily meteorological data. This ET0 along with observed ETc from lysimeter was used to determine the crop co-efficient (Kc) at 3 stages, namely growing stage, mid-stage and late-stage based on the rate of crop evapo-transpiration and crop co-efficient. The average crop co-efficient values for 3 stages were found to be 0.70, 1.1 and 0.77; and those of crop evapo-tranpiration were 2.62, 3.53 and 3.01 mm/day; all in respective order. Due to climatic advantage, the crop is grown three times during the year (first season-from second week of April to end of August, second season-from mid August to end of December, third season from mid December to mid-April) with weekly average water requirement of 22.0 mm. From the analysis of average weekly rainfall for 48 years (1960–2007) and water requirement of the crop, supplemental irrigation of 7.3 m3/ha/day for the first three to four weeks in the first season and 26.5 m3/ha/day during the third season are required to avoid the risk of crop failure, whereas in the second season, the available rainfall serves the crop water requirement.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor icar
 
Date 2011-01-04
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/2544
 
Source The Indian Journal of Agricultural Sciences; Vol 79, No 12 (2009)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/2544/671
 
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