Soil-Water Dynamics, Evapotranspiration, and Crop Coefficients of Cover-Crop Mixtures in Seed Maize Cover-Crop Rotation Fields. II: Grass-Reference and Alfalfa-Reference Single (Normal) and Basal Crop Coefficients
Publication: Journal of Irrigation and Drainage Engineering
Volume 143, Issue 9
Abstract
Cover crops have been gaining attraction in agriculture as rotational crops because of their potential benefits in various soil characteristics and soil-water functions. The knowledge about cover-crop water use in terms of examining the water availability for the next field crop is very important for developing and implementing sustainable agricultural management strategies. Crop coefficients for estimating water use for cover crops are among one of the least available coefficients of any cropping systems. In this study single (normal) and basal grass-reference ( and ) and alfalfa-reference ( and ) crop coefficients were developed as a function of cumulative growing degree days (CGDD) for (1) cover-crop mixes (CC) only, (2) seed maize cover-crop rotation (SCCC), (3) seed maize residue without cover crop (SC), and (4) bare soil. The research was conducted for three cover-crop growing seasons (2012–2013, 2013–2014, and 2014–2015) on three center pivot–irrigated seed maize cover-crop rotation fields (F1, F2, and F3) near Beaver Crossing, Nebraska. Single and basal crop coefficients were developed from the data and estimated grass-reference and alfalfa-reference evapotranspiration ( and ). The and values exhibited interannual variability for the same months and treatments between the years. The and varied from 0.0 to 1.8 and 0.0 to 1.2, respectively, in the 2012–2013 season; from 0.0 to 2.3 and 0.0 to 1.7, respectively, in the 2013–2014 season; and from 0.0 to 2.3 and 0.0 to 1.7 in the 2014–2015 cover-crop growing season. On average, the cover crop and values fluctuated between 0.0 to 1.6 and 0.0 to 1.5, respectively. In general, depending on the treatment, maximum and values occurred at CGDD between approximately 980 and 1,300°C (end of October), which then gradually decreased in the winter months. Minimum values usually occurred at CGDD of approximately 200°C. The and curves presented in this study are among first cover crop values and can be used to estimate cover crop for particular cover-crop mixtures that are similar to those used in this research and grown under climatic conditions similar to the research area.
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Acknowledgments
This project was funded and supported by the USDA-NRCS, National Conservation Innovation Grants Program under project number 69-3A75-12-207. As the project principal investigator, Dr. Suat Irmak expresses his appreciation to the USDA-NRCS for collaboration and for providing financial support for this project. Dr. Irmak also expresses his appreciation to David Cast and Doug Cast in Beaver Crossing, NE for allowing these extensive projects to happen in their production fields and for their excellent collaboration. Dr. Irmak also thanks Kari E. Skaggs for her contributions in field data collection. This study is based on work that is supported by the National Institute of Food and Agriculture, USDA, Dr. Irmak’s hatch project, under project number NEB-21-155.
References
ASCE-EWRI (Environmental and Water Resources Institute). (2005). “The ASCE standardized reference evapotranspiration equation.”, Standardization of Reference Evapotranspiration Task Committee, Reston, VA.
Bodner, G., Loiskandl, W., and Kaul, H. (2007). “Cover crop evapotranspiration under semi-arid conditions using FAO dual crop coefficient method with water stress compensation.” Agric. Water Manage., 93(3), 85–98.
Dabney, S., Delgado, J., and Reeves, D. (2001). “Using winter cover crops to improve soil and water quality.” Commun. Soil Sci. Plant Anal., 32(7–8), 1221–1250.
Doorenbos, J., and Pruitt, W. O. (1977). “Crop water requirements.”, Food and Agriculture Organization of the United Nations, Rome.
FAO (Food and Agricultural Organization of the United Nations). (1998). “Guidelines for computing crop water requirements.”, Rome.
Frye, W. W., Varco, J. J., Blevins, R. L., Smith, M. S., and Corak, S. J. (1988). “Role of annual legume cover crops in efficient use of water and nitrogen.” Cropping strategies for efficient use of water and nitrogen, W. L. Hargrove, ed., American Society of Agronomy, Madison, WI, 129–154.
Hay, C. H., and Irmak, S. (2009). “Actual and reference evaporative losses and surface coefficients of a maize field during nongrowing (dormant) periods.” J. Irrig. Drain. Eng., 313–322.
Hunsaker, D. (1999). “Basal crop coefficients and water use for early maturity cotton.” Trans. ASAE, 42(4), 927–936.
Irmak, S. (2010). “Nebraska water and energy flux measurement, modeling, and research network (NEBFLUX).” Trans. ASABE, 53(4), 1097–1115.
Irmak, S. (2015a). “Interannual variation in long-term center pivot–irrigated maize evapotranspiration and various water productivity response indices. I: Grain yield, actual and basal evapotranspiration, irrigation-yield production functions, evapotranspiration-yield production functions, and yield response factors.” J. Irrig. Drain. Eng., 04014068.
Irmak, S. (2015b). “Interannual variation in long-term center pivot–irrigated maize evapotranspiration and various water productivity response indices. II: Irrigation water use efficiency, crop WUE, evapotranspiration WUE, irrigation-evapotranspiration use efficiency, and precipitation use efficiency.” J. Irrig. Drain. Eng., 04014069.
Irmak, S., Allen, R. G., and Whitty, E. B. (2003). “Daily grass and alfalfa-reference evapotranspiration estimates and alfalfa-to-grass evapotranspiration ratios in Florida.” J. Irrig. Drain. Eng., 360–370.
Irmak, S., Kabenge, I., Rudnick, D., Knezevic, S., Woodward, D., and Moravek, M. (2013). “Evapotranspiration crop coefficients for mixed riparian plant community and transpiration crop coefficients for phragmites, cottonwood and peach-leaf willow in the Platte River Basin, Nebraska-USA.” J. Hydrol., 481, 177–190.
Irmak, S., Kabenge, I., Skaggs, K., and Mutiibwa, D. (2012). “Trend and magnitude of changes in climate variables and reference evapotranspiration over 116-year period in the Platte River Basin, central Nebraska-USA.” J. Hydrol., 420, 228–244.
Islam, N., Wallender, W. W., Mitchell, J., Wicks, S., and Howitt, R. E. (2006). “A comprehensive experimental study with mathematical modeling to investigate the affects of cropping practices on water balance variables.” Agric. Water Manage., 82(1), 129–147.
Jones, H. G. (1992). Plants and microclimate: A quantitative approach to environmental plant physiology, Cambridge University Press, Cambridge, U.K.
McMaster, G. S., and Wilhelm, W. (1997). “Growing degree-days: One equation, two interpretations.” Agric. Forest Meteorol., 87(4), 291–300.
Monteith J. L. (1965). “Evaporation and the environment.” Proc., XIXth Symp. on Society for Experimental Biology: The State and Movement of Water in Living Organisms, Cambridge University Press, Cambridge, U.K., 205–234.
Payero, J. O., and Irmak, S. (2013). “Daily energy fluxes, evapotranspiration and crop coefficient of soybean.” Agric. Water Manage., 129, 31–43.
Qi, Z., Helmers, M. J., and Kaleita, A. L. (2011). “Soil water dynamics under various agricultural land covers on a subsurface drained field in north-central Iowa, USA.” Agric. Water Manage., 98(4), 665–674.
Sharma, V., Irmak, S., Sharma, V., Djaman, K., and Odhiambo, L. (2017). “Soil-water dynamics, evapotranspiration, and crop coefficients of cover-crop mixtures in seed maize cover-crop rotation fields. I: Soil-water dynamics and evapotranspiration.” J. Irrig. Drain. Eng., 04017032.
Smith, M. S., Frye, W. W., and Varco, J. J. (1987). “Legume winter cover crops.” Advances in soil science, Springer, New York, 95–139.
Steele, D., Sajid, A., and Prunty, L. (1996). “New corn evapotranspiration crop curves for southeastern North Dakota.” Trans. ASAE, 39(3), 931–936.
Unger, P. W., and Vigil, M. F. (1998). “Cover crop effects on soil water relationships.” J. Soil Water Cons., 53(3), 200–207.
USDA-NASS (National Agricultural Statistics Service). (2012). Census of agriculture: Farm and ranch irrigation survey, Washington, DC.
USDA-NRCS (Natural Resources Conservation Service). (1985). “National engineering handbook: Section 4.” Hydrology, Soil Conservation Service, USDA, Washington, DC.
Wagger, M. G., and Mengel, D. B. (1988). “The role of nonleguminous cover crops in the efficient use of water and nitrogen.” Cropping strategies for efficient use of water and nitrogen, W. L. Hargrove, ed., American Society of Agronomy, Madison, WI, 115–127.
Wright, J. L. (1982). “New evapotranspiration crop coefficients.” Proc. Am. Soc. Civil Eng. J. Irrig. Drain. Div., 108(IR2), 57–74.
Yang, S., Logan, J., and Coffey, D. L. (1995). “Mathematical formulae for calculating the base temperature for growing degree days.” Agric. Forest Meteorol., 74(1), 61–74.
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©2017 American Society of Civil Engineers.
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Received: Jul 13, 2016
Accepted: Mar 21, 2017
Published online: Jun 24, 2017
Published in print: Sep 1, 2017
Discussion open until: Nov 24, 2017
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