Yield of Safflower (Carthamus tinctorius L.) Cultivars in Response to Phosphorus Application and Its Efficiency Indices

K Mirzashahi, M Moayeri, F Nourgholipour
2020 Pizhūhishhā-yi zirā̒ī-i Īrān  
Phosphorus is the third most important nutrient in crop production after nitrogen and potassium. It is involved in all biochemical processes, energetic compounds, and energy transfer mechanisms. Phosphorus participates in the cellular proteins and cell membrane and nucleic acids. In addition, this element is essential for seed formation and root development. Also, this element recovery in the first year of application estimates to be 8 to 30%, and after 30 years rarely reaches to 50% and its
more » ... t is stabilized in the soil and accumulates inaccessibly for most plants. Therefore, in the last two decades, scientists have used various methods to improve the efficiency of phosphorus, including the selection and genetic modification of plants and the adopting agricultural practices such as determining the optimal amount of phosphorus, the right time and method of application and the right fertilizer source. In addition, due to the growing trend of vegetable oil consumption and the high cost of supplying the required oil through imports, the purpose of this study was to determine the optimal rate of phosphorus and selecting the appropriate efficient cultivar in order to extend oilseed crops cultivation. Materials and Methods: In order to study the response of safflower cultivars (Carthamus tinctorius L.), to phosphorus rates and their efficiency indices, a factorial experiment was conducted in a randomized complete block design with three replications during 2012-13 and 2014-15 at Safiabad Agricultural Research Center of Dezful, Khuzestan, Iran. The first factor included five phosphorus levels (0, 50,100, 150 and 200 kg ha-1 as Triple Super Phosphate "TSP"), and the second factor included two cultivars (Goldasht and Soffeh). Safflower seeds were planted by setting up a sugar beet planter, in a row with a distance of 50 cm between rows and a distance of 5 cm between plants. Urea and potassium sulfate were uses at 300 and 100 kg ha-1, respectively. One-third of nitrogen and all phosphorus and potassium were [...]
doi:10.22067/jcesc.2021.37185.0 doaj:cc8f9018732540ddb367fab3769e7069 fatcat:bbyxpezwyzcx5kzy7ygtdbc5ee