Univrsity of Tehran Press Iranian Journal of Field Crop Science 2008-4811 55 2 2024 06 21 Evaluation of the Macronutrients Uptake and Phosphorus Efficiency Traits of Rapeseed (Brassica napus) under Phosphorus Fertilizer Management Evaluation of the Macronutrients Uptake and Phosphorus Efficiency Traits of Rapeseed (Brassica napus) under Phosphorus Fertilizer Management 123 139 96634 10.22059/ijfcs.2024.367378.655038 FA Mozhgan Sadeghi Department of Agronomy and Plant Breeding, Faculty of Agriculture, Yasouj University, Yasouj, Iran. 0009-0007-3852-0350 Mohsen Movahhedi Dehnavi Department of Agronomy and Plant Breeding Faculty of Agriculture, Yasouj University, Yasouj, Iran 0000-0002-6067-3317 Alireza Yadavi Department of Agronomy and Plant Breeding, , Faculty of Agriculture . Yasouj University, Yasouj, Iran 0000-0001-5788-9304 Fatemeh Ebrahimi Department of Agronomy and Plant Breeding, Faculty of Agriculture, Yasouj University, Yasouj, Iran 0009-0003-8121-1933 Journal Article 2023 10 31 Uptake and use efficiencies of phosphorus and some other nutrients affected by rate of phosphorus fertilizer and bio-fertilizers application. This experiment carried out to evaluate the effect of chemical and biological phosphorus fertilizers on the phosphorus uptake and use efficiency in rapeseed in a factorial based on a randomized complete block design with three replications at the research station of the Faculty of Agriculture, Yasouj University, in 2019. The first factor included zero, 25, 50, 75, 100, and 125 kg ha^-1of phosphorus and the second factor included phosphorus biofertilizer containing <em>Pseudomonas</em> and its non-use. Phosphorous increased the uptake of nitrogen, phosphorus, and potassium. The highest yield was obtained from 125 kg of phosphorus and phosphorus biofertilizer. With the consumption of 125 kg of phosphorus and biofertilizer, the highest phosphorus use efficiency and remobilization was achieved. The highest phosphorus harvest index was obtained from the applying 50 kg of phosphorus and no biofertilizer, and the highest phosphorus utilization efficiency was obtained from the applying 50 kg of phosphorus along with biofertilizer. Generally, using biofertilizer with phosphorus increased nutrients uptake and seed yield. In traits such as grain yield, grain and shoot phosphorus content, there was no significant difference between the application of 50 kg of phosphorus + bacteria with the application of higher levels of phosphorus fertilizer alone, therefore, biological fertilizer can be substituted a significant part of chemical phosphorus fertilizer. Uptake and use efficiencies of phosphorus and some other nutrients affected by rate of phosphorus fertilizer and bio-fertilizers application. This experiment carried out to evaluate the effect of chemical and biological phosphorus fertilizers on the phosphorus uptake and use efficiency in rapeseed in a factorial based on a randomized complete block design with three replications at the research station of the Faculty of Agriculture, Yasouj University, in 2019. The first factor included zero, 25, 50, 75, 100, and 125 kg ha^-1of phosphorus and the second factor included phosphorus biofertilizer containing <em>Pseudomonas</em> and its non-use. Phosphorous increased the uptake of nitrogen, phosphorus, and potassium. The highest yield was obtained from 125 kg of phosphorus and phosphorus biofertilizer. With the consumption of 125 kg of phosphorus and biofertilizer, the highest phosphorus use efficiency and remobilization was achieved. The highest phosphorus harvest index was obtained from the applying 50 kg of phosphorus and no biofertilizer, and the highest phosphorus utilization efficiency was obtained from the applying 50 kg of phosphorus along with biofertilizer. Generally, using biofertilizer with phosphorus increased nutrients uptake and seed yield. In traits such as grain yield, grain and shoot phosphorus content, there was no significant difference between the application of 50 kg of phosphorus + bacteria with the application of higher levels of phosphorus fertilizer alone, therefore, biological fertilizer can be substituted a significant part of chemical phosphorus fertilizer. https://ijfcs.ut.ac.ir/article_96634_4a6f4296947c9d046dd24454aff09cd7.pdf