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

Document Type : Research paper

Authors

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

Abstract

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

Highlights

  • 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.

Keywords

Main Subjects


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