Determining yield response factor (ky) of silage maize under different irrigation levels of pulsed and continuous irrigation management

Document Type : Research paper


1 Department of Water Management and Engineering, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran

2 Agricultural Engineering Research Institute (AERI), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran


The amount of irrigation water applied to the root zone of plants can greatly affect crop yield. The yield response factor (ky) indicates the reduction in crop yield as a function of evapotranspiration and can be an important tool for yield forecasting and irrigation management. The objective of this study was to determine the yield response factor (ky) of silage maize under different irrigation levels in the arid and semi-arid regions of Varamin, Iran. Actual crop evapotranspiration was determined by monitoring soil water content in the root zone of the plants. After harvest, the biological yield was determined and the yield response factor of silage maize was calculated. The results showed that the highest and lowest biological yield of silage maize were associated with treatments PI1 and PI4, respectively. The silage corn yield response factor (ky) in this study was 2.13, indicating a high sensitivity of silage corn yield to crop water use. As a result, it is recommended that pulsed management in drip irrigation systems with 60% deficit irrigation be avoided in areas with climatic conditions similar to those in the study area and limited water resources, as this reduces crop production efficiency.

Graphical Abstract

Determining yield response factor (ky) of silage maize under different irrigation levels of pulsed and continuous irrigation management


  • Pulsed irrigation refers to the practice of repeating irrigation on-off cycle until the entire irrigation depth is applied.
  • Deficit irrigation creates water stress that can affect the growth and development of silage maize.
  • The yield response factor (ky) indicates crop yield reduction as a function of evapotranspiration.
  • The ky factor of silage maize in this study was equal to 2.13.


Main Subjects

Allen, R.G., Pereira, L.S., Raes, D., Smith, M., 1998. Crop evapotranspiration-Guidelines for computing crop water requirements-FAO Irrigation and drainage paper 56. Fao, Rome, 300(9), D05109.
Dağdelen, N., Yılmaz, E., Sezgin, F., Gürbüz, T., 2006. Water-yield relation and water use efficiency of cotton (Gossypium hirsutum L.) and second crop corn (Zea mays L.) in western Turkey. Agric. Water Manag., 82(1-2), 63-85.
Dixit, G., 2020. Assessment of biological parameters in tomato cultivars irrigated with fertilizer factory wastes. Cent. Asian J. Environ. Sci. Technol. Innov., 1(4), 219-225.
Doorenbos, J., Kassam, A.H., 1979. Yield response to water. Irrig. Agric. Dev., 33, 257-280.
CrossRef    Google Scholar    full-text PDF    Mendeley     
Gençoğlan, C., Yazar, A., 1999. The effects of deficit irrigations on corn yield and water use efficiency. Turkish J. Agric. For., 23(2), 233-242.
Gupta, A., Rao, K.V.R., Singh, S., Soni, K., Sawant, C., 2019. Water productivity and yield of baby corn (Zea mays L.) as influenced by irrigation levels under subsurface drip irrigation. Int. J. Chem. Stud., 7(5), 128-135.
Kipkorir, E.C., Raes, D., Massawe, B., 2002. Seasonal water production functions and yield response factors for maize and onion in Perkerra, Kenya. Agric. Water Manag., 56(3), 229-240.
Kirda, C., Kanber, R., Tulucu, K., 1995. Yield response of cotton, maize, soybean, sugar beet, sunflower and wheat to deficit irrigation. Joint FAO/IAEA Div. of Nuclear Techniques in Food and Agriculture.
Kiziloglu, F.M., Sahin, U., Kuslu, Y., Tunc, T., 2009. Determining water–yield relationship, water use efficiency, crop and pan coefficients for silage maize in a semiarid region. Irrig, Sci., 27(2), 129-137.
Moutonnet, P., 2002. Yield response factors of field crops to deficit irrigation. Deficit Irrig. Pract.
Payero, J.O., Melvin, S.R., Irmak, S., Tarkalson, D., 2006. Yield response of corn to deficit irrigation in a semiarid climate. Agric. Water Manag., 84(1-2), 101-112.
Sarker, M., Choudhury, S., Islam, N., Zeb, T., Zeb, B., Mahmood, Q., 2020. The effects of climatic change mediated water stress on growth and yield of tomato. Cent. Asian J. Environ. Sci. Technol. Innov., 1(2), 85-92.
Ucak, A.B., Ayasan, T., Turan, N., 2016. Yield, quality and water use efficiencies of silage maize as effected by deficit irrigation treatments. Turkish J. Agric. Food Sci. Technol., 4(12), 1228-1239.
CrossRef    Google Scholar    full-text PDF    Mendeley