Investigating the influence of growth inhibitors on the growth and yield of oat (Avena sativa)

Citation :- Investigating the influence of growth inhibitors on the growth and yield of oat (Avena sativa). Res. Crop. 25: 258-262
Address : Department of Field Crops Sciences, College of Agricultural Engineering Sciences, University of Baghdad, Baghdad, Iraq.
Submitted Date : 21-02-2024
Accepted Date : 15-04-2024


  Food security is a major challenge faced by countries around the world due to the large increases in population numbers, climate change, and the problems it causes in agricultural production, such as droughts, floods, and hurricanes. Most oat varieties are characterized by their long stems, and this makes them effective Sink for the deposition of dry matter that can be directed to the grain in the case of the use of growth inhibitors (such as Cycocel and ethylene) that suppress the longitudinal growth of the stems and increase its diameter, as well as increase the number of effective branches, reduces the risk of lodging, thus increasing the grain yield. This experiment was conducted in the fields of the College of Agricultural Engineering Sciences, University of Baghdad, during the winter season of 2020-2021, to assess the effects of growth inhibitors Cycocel )CCC( and calcium carbide CaC2 (which generates ethylene), used three replications of a randomized complete block design (RCBD), Eight treatments were tested, including spraying CCC at concentrations of 200, 400, and 600 mg/L and ground application of CaC2 at 2 g/plant individually and in combination. The findings revealed that all treatments led to an increase in grain yield and a decrease in plant height compared to the control treatment. Notably, the C600 + CaC2 treatment exhibited significant superiority over other treatments in grain yield (5.52 t/ha), total dry matter (20.14 t/ha), and Harvest Index (25.21). These results suggest that growth inhibitors can effectively modulate the source-sink relationship, thereby enhancing grain yield.


Cac2 cycocel ethylene oats tillers


Abood, N. M., Shalal, E. M. and Hamdan, M. I. (2021). Impact of plant growth inhibitors on the growth and yield of sorghum. Iraqi J. Agric. Sci. 52: 1431-40. doi:10.36103/ijas.v52i6.1484.
Addaheri, A. M. S. and Abood, N. M. (2020). Response of oat cultivars to ethephon and boron. Iraqi J. Agric. Sci. 51: 259-68. doi:10.36103/ijas.v51i1.924.
Addahry, A. M. Salih (2020). Effect of foliar feeding with ethephon and boron on the growth and yield of oats (Avena sativa L). PhD thesis. Crop Department. College of Agriculture, University of Anbar, Iraq. pp. 105.
Ahmad, I., Kamran, M., Guo. Z., Meng, X., Ali, S., Zhang, P. and Han, Q. (2020). Effects of uniconazole or ethephon foliar application on culm mechanical strength and lignin metabolism, and their relationship with lodging resistance in winter wheat. Crop Pasture Sci. 71: 12-22. doi:10.1071/CP19149.
Al-Furaiji, H. T. R. and Shamsullah, J. A. (2019). Effect of calcium carbide, humic acid and nitrogen application on growth and yield of sunflower (Helianthus annuus L.). Plant Archives 19: 111-17.
Al-Hassani, A. J. A. (1996). The effect of cycocel and nitrogen on the growth and yield of barley. PhD thesis, College of Agriculture-University of Baghdad, Iraq.
Ali, D. L. and Khrbeet, H. K. (2023). Effect of plant density and spraying with ethephon on yield and its components of sorghum (var. Bohooth. 70). Wasit J. Pure Sci. 2: 31-41. doi:10.31185/wjps.121.
Ali, Z. A. and Basheer, A. A. (2023). The role of selected treatments in the parameters of leaf growth and yield of stevia plants under deficit irrigation system. IOP Conf. Series: Earth and Environ. Sci. 1-13. doi:10.1088/1755-1315/1225/1/012083.
Al-Naily, M. A. H. and Ibraheem, B. A. (2020). The effect of some plant growth retardants and water stress on some traits of sorghum (Sorghum bicolor L. Moench) stem. Plant Archives 20: 1492-99. 
Al-Zobaie, E. M. S. (2020). Response of several cultivars of white corn to plant growth impediments. Master's thesis, Department of Agronomy. Master's degree. College of Agriculture, Anbar University, Iraq. pp. 69.
Elsahookie, M. M., Younis, N. and Al-Khafajy, M. (2013). Genetic variation of some oat traits related to water salinity. Iraqi J. Agric. Sci. 44: 655-69.
FAO (2020). www. FAOSTAT@fao.org.com 
Ghani, A. J. (2011). The half guidance leaflet. General authority for agricultural guidance - Ministry of Agriculture - Republic of Iraq.
Hammood, W. F., Al-khafaji, M. J. and Safi, S. M. A. (2020). The effect of some herbicides on the companion weed to three cultivars of oats. Int. J. Agric. Stat. Sci. 16: 1527-32.
Jadoua, K. A. and Hamad, M. S. (2013). Fertilizing wheat crops: Guidance Bulletin No. (2), The National Program for the Development of Wheat, Ministry of Agriculture, Iraq. ‏‏
Santi Rosniawaty, Intan Ratna Dewi Anjarsari, Rija Sudirja, Syariful Mubarok and Dwi Fatmawati (2023). Effect of growth regulators and organic matter on the growth of Sappan wood seedlings (Caesalpinia sappan L.). Res. Crop. 24: 198-209.
Shekoofa, A. and Emam (2008). Effects of nitrogen fertilization and plant growth regulators (PGRs) on yield of wheat (Triticum aestivum L.) cv. Shiraz. Agric. Sci. Tech. J. 10: 101-08. ‏‏
Steel, R. G. D. and Torrie, J. H. (1980). Principles and procedures of statistics, 2nd Edn., McGraw-Hill Book Co., New York.
Sundus A. A. (2019). Effect of foliar application of humic acid on fodder and grain yield of oat (Avena sativa L.). Res. Crop. 20: 880-85.
Zadoks, J. C., Chang, T. T. and Konzak, C. F. (1974). A decimal code for the growth stages of cereals. Weed Res. 14: 415-21. doi:10.1111/j.1365-3180.1974.tb01084.x.


Global Footprints