Lysimeter based crop coefficients for estimation of crop evapotranspiration of black gram (Vigna Mungo L.) in sub-humid region
Abstract
Black gram is dominant pulse crop of the region. ?Crop coefficient is an important parameter, which needs to be determined for accurate estimates of the crop water requirement. ?Crop coefficient, the ratio of potential crop evapotranspiration to reference evapotranspiration, is an important parameter in irrigation planning and management. ?However, this information is not available for many important crops in the study region. ?A study was undertaken to develop crop coefficients for black gram crop, and a comparison is made of single and dual crop coefficient approaches to estimate actual crop evapotranspiration under the climatic conditions of Udaipur, India. ?Crop coefficient was developed from daily measured black gram evapotranspiration (ETBG) data by electronic weighing lysimeter and reference evapotranspiration calculated using standard Penman-Monteith method. ?The measured values of crop coefficient for the crop were 0.48, 1.18 and 0.33 during initial, mid-season and late-season stages. ?The evaluation of different approaches showed that daily ETBG estimate based on dual crop coefficient method have been found best (SE=0.40, r=0.96).? Furthermore, a quadratic curve (second-order polynomial) method were fitted well (SE=0.47, r=0.94) to predict crop coefficient values as function of days after sowing (DAS).? These locally developed and evaluated values can be used for proper irrigation planning in water scarcity area of Udaipur and other areas with similar agro-ecological conditions.
Keywords: lysimeter, evapotranspiration, crop coefficient, electronic weighing lysimeter, reference evapotranspiration, black gram (Vigna Mungo L.), irrigation
DOI: 10.3965/j.issn.1934-6344.2011.04.050-058
?
Citation: Pankaj K Pandey, Vanita Pandey. ?Lysimeter based crop coefficients for estimation of crop evapotranspiration of black gram (Vigna Mungo L.) in sub-humid region. ?Int J Agric & Biol Eng, 2011; 4(4): 50Keywords
References
Doorenbos J, Pruitt W O. Guidelines for predicting crop water requirement: FAO irrigation and drainage paper No. 24, FAO, Rome, Italy. 1977; p. 156.
Wright J L. New evapotranspiration crop coefficients: Journal of Irrigation and drainage Engineering, 1982; 108(1): 57-74.
Pruitt W O. Development of crop coefficients using lysimeters: Lysimeters for evapotranspiration and environmental measurement. (Ed. Allen R.G., T.A. Howell, W.O. Pruitt, L.A. Walter and M.E. Jensen) ASCE, New York, 1992; pp 182-200.
Tarantino E. Grass reference measurement in Italy: Lysimeters for evapotranspiration rates and environmental measurements (Ed.Allen, R.G., T.A. Howell, W.O.Pruitt, I.A. Walter and M.E. Jensen) ASCE, New York, 1992; p. 200-209.
Tyagi N K, Sharma D K, Luthra S K. Determination of crop coefficients of rice and sunflower. Agriculture Water Management, 2000; 45: 41-54.
Allen R G, Pereira L S, Raes D, Smith M. Crop evapotranspiration, Guideline for computing crop water requirement: FAO irrigation and drainage paper 56. FAO Rome, Italy. 1998; p. 300.
Kashyap P S, Panda R K. Evaluation of crop evapotranspiration and development of crop coefficient for potato crop in sub humid region. Agriculture Water Management, 2001; 50(1): 9-25.
Burman R D, Nixon P R, Wright J L, Pruitt W O. Water requirements. In: Design and operation of farm irrigation systems, edited by Jensen, M. E.; 189–232; Transaction of American Society of Agricultural Engineers, St. Joseph, Mich; 1980.
Jensen M (Ed.) Consumptive use of water and irrigation requirements: Rep. Tech.Com. On irrigation water requirements; Irrigation and Drainage Division, American Society of Civil Engineers; 1974; p.227 .
Pruitt W, Lourence F J, von Oettingen S. Water use by crops as affected by climate and plant factors. Californian
Agriculture, 1972; 26(10): 10–14.
Doorenbos J, Kassam A H. Yield response to water: FAO Irrigation and Drainage Paper No. 33. FAO, Rome, Italy; 1979.
Allen R G. Using the FAO-56 Dual crop coefficient method over an irrigated region as part of an evapotranspiration intercomparison study: J. of Hydrol, 2000; 229: 27-41.
Allen R G, Walter I A, Elliot R, Howell T, Itenfisu D, Jensen M. The ASCE standardized reference evapotranspiration equation. American Society of Civil Engineers. Reston, Virginia 2005.
Ritchie J T. Model for predicting evaporation from a crop with incomplete cover. Water Resour. Res., 1972; 8: 1204–1213.
Daamen C C, Simmonds L P, Wallace J S, Laryea K K, Siva Kumar M V K. Use of microlysimeters to measure evaporation from sandy soils.: Agric. For. Meteorol, 1993; 65: 159-173.
Wallace J S, Holwill C J. Soil evaporation from Tiger-Bush in Niger: J. Hydrol., 1997; 188-189: 426-442.
Sepaskhah A R, Andam M. Crop coefficient of sesame in semi-arid region of Iran. Agricultural Water Management, 2001; 49(1): 51-63.
Copyright (c)