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ET where a deficit irrigation system is being considered and
<br />shallow water table conditions exist.
<br />SUMMARY AND CONCLUSIONS
<br />Data from several studies conducted across the Great Plains and
<br />Intermountain West tithe United States were examined to evalu-
<br />ate the biomass yield response of irrigated alfalfa to ET and to deter-
<br />mine how that response is affected by deficit irrigation strategies
<br />(Daigger et al., 1970; Bauder et al., 1978; Recta and Hanks, 1980;
<br />Sammis, 1981; Carter and Sheaffer, 1983; Undersander, 1987;
<br />Wright, 1988, Bogler and Matches, 1990; Smeal et al., 1991). Only
<br />studies that accounted for water from all sources, includingsoil
<br />water, were reviewed to elucidate management practices that can
<br />improve WUE in deficit irrigated alfalfa. The results of these stud-
<br />ies revealed apositive, linear response of alfalfa biomass yield to ET
<br />and suggested several management techniques that could improve
<br />that relationship. Total seasonal ET of alfalfa ranged from 18 cm
<br />under dryland to 152 cm under full irrigation with an average total
<br />seasonal ET of 88 cm. The irrigation strategy used to reduce ET in
<br />most reported studies was deficit irrigation, with a reduced amount
<br />of irrigation water applied throughout the entire crop growing sea-
<br />son. A relative water production function accounted for most of the
<br />environmental and climate variability among studies and showed
<br />that when managing irrigation to reduce ET, yield declines from its
<br />local maximum 25% faster than ET.
<br />For environmental conditions in the Great Plains and Inter-
<br />mountain West, alfalfa WUE is greatest during the first harvest
<br />interval when plants are using carbohydrates stored in roots, solar
<br />irradiance is high, and temperatures are relatively low. Thus, partial
<br />season irrigation is a potential management approach to saving
<br />irrigation water that combines full irrigation during the earliest
<br />growth cycle with no irrigation during subsequent growth cycles.
<br />Irrigation termination during hot, dry summers can be detrimen-
<br />tal to alfalfa stands in arid environments and sandy soils (Ottman
<br />et al., 1996), but evidence suggests minimal stand loss in semiarid
<br />environments with finer soil textures (Hansen and Putnam,
<br />2000). Partial season irrigation may improve total seasonal WUE
<br />for alfalfa compared to deficit irrigation and may be a better
<br />approach for conservation of agricultural water compaired to
<br />deficit irrigation or conversion to dryland production.
<br />REFERENCES
<br />Bauder, J.W.,A. Bauer,J.M. Ramierez, and D.K. Cassel 1978.Alfalfawacer use andproduo
<br />don on dryland and irrigated sandy loam. Agron.J. 70:95-99.
<br />Benz, L.C., E J. Doering, and G.A. Rachman. 1984. Water-cable contribution to alfalfa
<br />evapotranspiration and yields in sandy soil. Trans. ASAE 27:1307 -1312.
<br />Bogler,T.P., andA.G. Matches. 1990. Water use efficiency and yield ofsainfoin and alfalfa.
<br />Crop Sci. 30:143 -148.
<br />Brown, RH., R.B. Pearce, D. D. Wol£ and R.E. Blaser. 1972. Energy accumulation and ud-
<br />lizacion. p.143 -166. In C.H. Hanson **Alfalfa science and technology. Monogr.
<br />15. ASA, Madison, WI.
<br />Caner, P.R., and C.C. Shcaffet 1983. Alfalfa response co soil ware: deficits. L Growth, for-
<br />age quality, yield, andwareruse efficiency. Crop Sol 23:669 -675.
<br />Colorado Warer Conservation Board. 2004a. Statewide Water Supply Initiative Update
<br />on statewide ureter supply initiative- Arkansas basin. Colorado Dep, of Natural
<br />• Resources, Denver.
<br />Colorado Water Conservation Bard. 20046. Statewide Warer Supply Initiative Update
<br />on statewide water supply initiative -South Platte basin. Colorado Dep. of Natural
<br />Resources, Denver.
<br />Daigger, L.A., LS.Aathelm, and C.L. Ashburn. 1970. Consumptive use ofwaterbyalfalfa
<br />in western Nebraska Agron. J. 62.507 -508.
<br />Dardanelli,J., and DJ. Collin. 2002. Worercableconeribudons to alfalfa water use in dif-
<br />ferent environments of the Argentine pampas. Agriscientia 19:11 -18.
<br />Delaney; RH., A.K Dobrenz, and H.T. Poole. 1974. Seasonal variation in photosynthesis,
<br />respiration, and growth components of non - dormant alfalfa (Mee&s,go saliva L.).
<br />Crop Sci. 14:58 -61.
<br />Dugan, J.T., and J.B. Sharpe. 1996. Water -level changes in the High Plains aquifer, prede-
<br />velopment to 1994. Available at http:// wacer.usgs .gov /wid/FS_215.95/FS_215 -95.
<br />html (modified 4 Mar.1996; accessed 21 Apr. 2008; verified 1 Sept. 2010). USGS,
<br />Lincoln,NE.
<br />Grimes, D.W., P.L. Wiley, and W.R. Shaky. 1992. Alfalfa yield and plant water relations
<br />with variable irrigation. Crop Sci. 32:1381 -1387.
<br />Hanson, B., and D. Putnam. 2000. Can alfalfa be produced with less water ?p. 43 -54. In
<br />Proc. ofthe30thCalifomiaAlfalfaand29thNatiomdA lfalfaSymp..LasVegas.NV.
<br />11 -12 Da. 2000. Dep. ofAgron. and Range Sci. Exc, Univ. of California, Davis.
<br />Hanson, AA, D.K. Barnes, and RR. Hill. 1988. Alfalfa and alfalfa improvement
<br />Monogr.29. SSSA, CSSA. and ASA, Madison. WI.
<br />Harrendorf, MJ., D.W. Evans, and R.N. Pcaden. 1990. Canopy tcmperarure and stoma -
<br />tal conductance of warerstressed dormant and nondormant alfalfa types. Agron. J.
<br />82:873 -877.
<br />Holt, D.A., M.M. Schreiber, R.M. Pears, RJ. Bula, and G.E. Miles. 1975. Environmental
<br />physiology, modeling, and simulation of alfalfa growth. I. Conceptual development
<br />ofSIMED. Res. Bull. Purdue Univ. Agric. Exp. Stn., West Lafayette, IN.
<br />Jung. G.A., and K.L. Larson. 1972. Cold, drought and heat tolerance. p.185- 209. C.H.
<br />Hanson (ed.)Alfalfa science andtechnology. ASA Monogr. 15. ASA, Madison, WL
<br />Kruse, E.G., D.F. Champion, D.L. Cuevas, RL Yoder, and D. Young.1993. Crop water use
<br />from shallow, saline water tables. Trans. ASAE 36:697 -707.
<br />Leavitt J.R.C, A.K. Dobrenz, andJ.E. Stone. 1979. Physiological and morphological char-
<br />acteristics oflarge and small leaflet alfalfagenorypes. Agron. J.71:529 -532.
<br />MacAdam, J.W and A.L. Barra. 2007. Irrigation and water management p. 379 -394. In
<br />R.F Barnes et al. (ed.) Forages. The science of grassland agriculture. Vol. II. 6th ed.
<br />Iowa Stare Press, Ames.
<br />McGuire, V.L. 2004. Waterdevel changes in the High Plains Aquifer, predevelopment to
<br />2002,1980 to 2002, and 2001 to 2002. USGS Fact Sheet 2004 -3026. U.S. Dep. of.
<br />the Interior. Washington, DC.
<br />National Agricultural Statistics Service. 2007. Hay alfalfa (dry): National sraeisda. Avail-
<br />able ar harp: / /www.nass.usda.gov (modified 3 Apr. 2008, accessed 28 Apr. 2008;
<br />verified 1 Sept. 2010) USDA, Washingron, DC.
<br />Nelson, CJ., and D. Smith. 1968. Growth ofbirdsfoot trefoil and alfalfa. II. Morphological
<br />devdopmentand dry matter distribution Crop Sci. 8:21-25.
<br />Otrman, M J.B.R. Tithes, and R.L. Roth. 1996.Alfulfa yield andstandresponseto irriga-
<br />doncermination in an arid environment. Agron. J. 88:44-48.
<br />Peterson, H.B.1972. Water relationships and irrigation. p. 469- 480.Irs C.H. Hanson (eel.)
<br />Alfalfa science and technology. Monogr. 15. ASA, CSSA, and SSSA, Madison, WI.
<br />Putnam, D., S. Odaff, B. Hanson, and H. Carlson. 2005. Controlled deficit irrigation of
<br />alfalfa in differing environments. In Abstracts. 2005 Inc Annual Meet., Salt Lake
<br />Ciry, UT. 6 -10 Nov 2005. ASA. CSSA, and SSSA,Madison, WI.
<br />Recta, A., and kJ. Hanks. 1980. Corn and alfalfa producrion as influenced bylimired irri-
<br />gation.Irrig. Sci. 1:135-147.
<br />Robinson, G.D., and M.A. Massengale. 1968. Effca ofharvest management and temper:
<br />tune on forage yield, root carbohydrates, plant density and leaf area relationships in
<br />alfalfa. Crop Sci. 8:147-151.
<br />Sammis, T.W. 1981. Yield of alfalfa and cotton as influenced by irrigation. Agron. J.
<br />73'323-329.
<br />Schneeldorh, J., and A. Andales.2009. Seasonal water needs and opportunities for limited
<br />irrigation for Colorado crops. Available ar hap://www.crocolostareeduipubs/
<br />crops /04718.html (accessed 6 May 2008; verified 1 Sept.. 2010) Colorado State Univ.
<br />Coop. Exc., Fort. Collins.
<br />Selirio, I.S., and D.M. Brown 1979. Soil moisture-based simulation of forage yield. Agric.
<br />Mereorol.22:99 -114.
<br />Smeal, D., C.E. Kallsen, and TIC. Sammis. 1991: Alfalfa yidd as related to transpiration,
<br />growth, and environment. Irrig. Sci. 12:79 -86.
<br />Smith, D.1960. The establishment and management ofallalfa.Bull.542. WisconsinAgric.
<br />Exp, Scn, Madison.
<br />Smith, D.1962. Carbohydrate root reserves in alfalfa, rod. clover, and birdsfoot trefoil under
<br />several management schedules. Crop ScL 2.75 -78.
<br />Smith, D. 1972. Cutting schedules and maintaining pure stands. p. 481 -496. In C.H.
<br />Hanson (ed.) Alfalfa science and technology: ASA Monogr.15. ASA, Madison, W I.
<br />Smith, S.E. 1993. Salinity and the production of alfalfa (AIedicago :anal L.). p. 431 -448.
<br />In M. Pessaralcli (ed.) Handbook of crop stress. Vol. 1. Marcel Dekker, New York
<br />City, NY.
<br />Smnberry, C.0.1955.Irrigation practices for the producdon ofalfalfa.p.435-443
<br />book ofagriculmre. USDA, Washington, DC.
<br />Thomas, M.D., and G.R. Hill. 1949. Photosynthesis under field conditions. p. 19-52. In
<br />J. Franck and W.E. Loomis (ed.) Photosynthesis in plants. Iowa Stare Coll. Press,
<br />Ames.
<br />Undersander,DJ,1987. Alfalfa ( MedicagoxuiveL .) growthresponserowarerandtempera-
<br />cure. brig. Sci. 8:23 -33.
<br />Wright, J.L. 1988. Daily and seasonal evapotranspiration and yield of irrigated alfalfa in
<br />southern Idaho. Agron. J. 80:662 -669.
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