Sorghum has become ever more prominent on the global energy scene, with studies in the area becoming extremely important. Agricultural production in the semi-arid region of the Brazilian Northeast is intrinsically dependent on rainfall in the region. However, on both inter- and intra-annual scale s , the rainfall regime is quite irregular. The aim of this study was to evaluate the productivity of sorghum grown under a rainfed regime, and the water-use efficiency of crops in the semi-arid region of the northeast of Brazil. The work was carried out in the city of Tabuleiro do Norte in the semi-arid region of the State of Ceará. Mean productivity of the sorghum was 919.42 kg · ha - 1 , with maximum values being recorded for lot 02 (1032 kg · ha - 1 ), lot 03 (1102 kg · ha - 1 ), lot 04 (2143 kg · ha - 1 ) and lot 12 (1367 kg · ha - 1 ). The greatest value for water-use efficiency, 1.13 m 3 · kg - 1 , was found for lot 04, while the smallest value, 4.83 m 3 · kg - 1 was seen in lot 02. It was found that the low productivity of sorghum in a rainfed regime shows that the lack of success in production systems in semi-arid regions is not due to the total amount of rainfall, but rather the spatial and temporal distribution of the rains, as well as the occurrence of hot, dry spells. Furthermore, it can be seen that the best ratio of grain production to water demand shows a strong correlation with the distribution of water throughout the cycle, and not only with the total volume.
Awika, J.M. and Rooney, L.W. (2004) Sorghum Phytochemicals and Their Potential Aspects on Human Health. Phytochemistry, 65, 1199-1221.
Mutisya, J., Sun, C., Rosenquist, S., Baguma, Y. and Jansson, C. (2009) Diurnal Oscillation of SBE Expression in Sorghum Endosperm. Journal of Plant Physiology, 166, 428-434. https://doi.org/10.1016/j.jplph.2008.06.017
Dicko, M.H., Gruppen, H., Traoré, A.S., Castano, G., Menendez, R., Mas R., Voragen, A.J. and Berkel, W. (2006) Sorghum Grain as Human Food in Africa: Relevance of Content of Starch and Amylase Activities. African Journal of Biotechnology, 5, 384-395.
Rooney, L.W. and Awika, J.M. (2005) Overview of Products and Health Benefits of Specialty Sorghums. Cereal Foods World, 50, 109-115.
USDA—United States Department of Agriculture. Foreign Agriculture Service, Production, Supply, and Distribution Database. https://www.usda.gov
Nelson, D.R., West, C.T. and Finan, T.J. (2009) Introduction to “In focus: Global Change and Adaptation in Local Places”. American Anthropologist, 111, 271-274. https://doi.org/10.1111/j.1548-1433.2009.01131.x
Guerreiro, M.J.S., Andrade, E.A., Abreu, I. and Lajinha, T. (2013) Long-Term Variation of Precipitation Indices in Ceará State, Northeast Brazil. International Journal of Climatology, 33, 2929-2939. https://doi.org/10.1002/joc.3645
Alves, J.M.B., Servain, J. and Campos, J.N.B. (2009) Relationship between Ocean Climatic Variability and Rainfed Agriculture in Northeast Brazil. Climate Research, 38, 225-236. https://doi.org/10.3354/cr00786
INSA—National Institute of the Semiarid. Population of the Semi-Arid. http://www.insa.gov.br
Venkateswarlu, B. and Prasad, J.V.N.S. (2012) Carrying Capacity of Indian Agriculture: Issues Related to Rainfed Farming. Current Science, 102, 882-888.
Institute of Economic Research and Strategy of Ceará (2015) Ceará in Maps. www.ipece.ce.gov.br
National Institute of Meteorology Climatology (2017) Maps. http://www.inmet.gov.br
Costa, S.C., Soares, A.A., Sediyama, G.C., Viana, T.V.A. and Moreira, F.V.O. (2011) Variation of Physical and Chemical Parameters of Fruit Fruits in ‘Pacovan’ Subjected to Different Irrigation Blades and Doses Potassium in Chapada do Apodi— Limoeiro do Norte-Ce. Irriga, Botucatu, 16, 82-92. https://doi.org/10.15809/irriga.2011v16n1p82
Magalhães, P.C., Durães, F.O.M. and Rodrigues, J.A.S. (2008) Cultivation of Sorghum: Ecophysiology. 4th Edition, Embrapa Milho e Sorgo, Sete Lagoas.
Basso, F.C., Andreotti, M., Carvalho, M.P. and Lodo, B.N. (2011) Relationship between Forage Sorghum Yield and Physical Attributes and Organic Matter Content Latosol at the Cerrado. Pesquisa Agropecuária Tropical, 41, 135-144. https://doi.org/10.5216/pat.v41i1.7099
Loomis, R.S. (1983) Crop Manipulations for Efficient Use of Water: An Overview. In: Taylor, H.M., Jordan, W.R. and Sinclair, T.R., Eds., Limitations to Efficient Water Use in Crop Production, American Society of Agronomy, Crop Society of America, and Soil Science Society of America, Madison, 345-374.
Emater, D.F. (2009) Technical Assistance and Rural Extension of Distrito Federal. http://www.emater.df.gov.br/index.php?option=com_content&view=article&id=75&Itemid=87
Pariz, C.M., Carvalho, M.P., Chioderoli, C.A., Nakayama, F.T., Andreotti, M. and Montanari, R. (2011) Spatial Variability of Forage Yield and Soil Physical Attributes of a Brachiaria Decumbens Pasture in the Brazilian Cerrado. Revista Brasileira de Zootecnia, 40, 2111-2120. http://dx.doi.org/10.1590/S1516-35982011001000007
Montanari, R., Zambianco, E.C., Corrêa, A.R., Pellin, D.M.P., Carvalho, M.P. and Dalchiavon, F.C. (2012) Physical Attributes of a Red Latosol Correlated Linearly and Spatially with the Consortium of Pigeon Pea with Millet. Ceres, 59, 125-135. http://dx.doi.org/10.1590/S0034-737X2012000100018
Freddi, O.S., Carvalho, M.P., Veronesi Júnior, V. and Carvalho, G.J. (2006) Productivity of Maize Related to Mechanical Resistance to Soil Penetration under Conventional Tillage. Revista de Engenharia Agrícola, 26, 113-121. http://dx.doi.org/10.1590/S0100-69162006000100013
Duque, J.G. (1973) The Northeast and the Xerophilous Crops. 2nd Edition, Northeast Bank, Lewiston, 238.
Silva, F.A.S. and Rao, T.V.R. (2002) Regimes Rainfall, Rainy Season and Probability of Occurrence of Dry Spells in the State of Ceará. Revista Brasileira de Engenharia Agrícola e Ambiental, 6, 453-459. http://dx.doi.org/10.1590/S1415-43662002000300010
Barron, J., Rockstrom, J., Gichuki, F. and Hatibu, N. (2003) Dry Spell Analysis and Maize Yields for Two Semiarid Locations in East Africa. Agricultural and Forest Meteorology, 117, 23-37. https://doi.org/10.1016/S0168-1923(03)00037-6
Goenster, S., Wiehle, M., Gebauer, J., Mohamed, A.A., Stern, R.D. and Buerkert, A. (2015) Daily Rainfall Data to Identify Trends in Rainfall Amount and Rainfall Induced Agricultural Events in the Nuba Mountains of Sudan. Journal of Arid Environments, 22, 16-26. https://doi.org/10.1016/j.jaridenv.2015.06.003
Neto, O.A., Caxito, A.M., Chaves, F.F. and Pessoa, S.T. (2016) Production Silage Brs Ponta Negra Sorghum in Small Farms in the North of Minas Gerais. Proceedings of 31st Congresso Nacional de Milho e Sorgo “Milho e Sorgo: Inovações, Mercados e Segurança Alimentar”, Bento Gonçalves, 25-29 September 2016, 181-185.
Foundation of Meteorology and Water Resources (2016) Historic Serie. http://www.funceme.br
Carvalho, D.F., Faria, R.A., Sousa, S.A.V. and Borges, H.Q. (2000) Spatialization of the Dry Spell Period for Different Levels of Loss of Production in Maize Rio Verde Grande, MG. Revista Brasileira de Engenharia Agrícola e Ambiental, 4, 172-176. http://dx.doi.org/10.1590/S1415-43662000000200007
Silva, L.L., Costa, R.F., Campos, J.H.B.C. and Dantas, R.T. (2009) Influence of Precipitation on Agricultural Productivity in the State of Paraíba. Revista Brasileira de Engenharia Agrícola e Ambiental, 13, 454-461. http://dx.doi.org/10.1590/S1415-43662009000400013
Soares, D.B. and Nóbrega, R.S. (2010) Analysis Spatial and Climatological of the Occurrence of Dry Spell in the Pernambuco. Recife, PE. Revista de Geografia, 27, 95-106.
Ribas, P.M. (2008) Cultivation of Sorghum: Planting. 4th Edition, Embrapa Milho e Sorgo, Sete Lagoas.
Soler, C.M.T., Sentelhas, P.C. and Hoogenboom, G. (2007) Application of the CSM CERES-Maize Mode for Planting Date Evaluation and Yield Forecasting for Maize Grown Offseason in a Subtropical Environment. European Journal of Agronomy, 27, 165-177. https://doi.org/10.1016/j.eja.2007.03.002
Andrade, C.L.T., Amaral, T.N., Silva, D.F., Garcia, A., Hoogenboom, G., Brito, R.A.L., Borges Júnior, J.C.F. and Gomide, R.L. (2009) Using the Ceres Maize Model as a Tool in the Definition of Maize Sowing Strategies: 3—Water Requirement and Productivity. Proceedings of XVI Congresso de Agrometeorologia, Belo Horizonte, 22-25 September 2009, 1528-1532.
Carvalho, D.F., Oliveira, M.A.A., Sousa, S.A.V. and Carvalho, P.O.L. (1999) Estimates of Occurrences of Dry Spell in Seropédica, Vassouras e Piraí (RJ), and Influence on Yield of Bean (Phaseolus vulgaris L.). Ciência e Agrotecnologia, 23, 323-330.
Xiao, G.J., Zhang, F.J., Huang, J.Y., Luo, C.K., Wang, J., Ma, F., Yao, Y.B., Wang, R.Y. and Qiu, Z.J. (2016) Response of Bean Cultures’ Water Use Efficiency against Climate Warming in Semiarid Regions of China. Agricultural Water Management, 173, 84-90. https://doi.org/10.1016/j.agwat.2016.05.010
Tenhunen, J., Roupsard, O. and Rambal, S. (2002) Severe Drought Effects on Ecosystem CO2 and H2O Fluxes at Three Mediterranean Evergreen Sites: Revision of Current Hypotheses. Global Change Biology, 8, 999-1017. https://doi.org/10.1046/j.1365-2486.2002.00530.x
Correia, C.A., Andrade, C.L.T., Silva, P.P.G. and Magalhães, B.G. (2016) Simulation of Water Productivity for Rainfed Corn in Municipalities of Minas Gerais. Proceedings of 31st Congresso Nacional de Milho e Sorgo “Milho e Sorgo: Inovações, Mercados e Segurança Alimentar”, Bento Gonçalves, 25-29 September 2016, 1200-1203.