Document Type : Research Paper
Authors
1
Genetics and Agricultural Biotechnology Institute of Tabarestan & Sari Agricultural Sciences and Natural Resources University, Sari, Iran
2
MSc. Graduated student, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
3
Crop and Horticultural Science Research Department, Mazandaran Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Sari, Iran
4
MSc. Graduated student, Kharazmi University of Tehran, Tehran, Iran.
5
University of Gabes, Laboratory of Rangeland Ecosystems and Valorization of Spontaneous Plants, Arid Regions Institute, El Fjé, Médenine, Tunisia
10.22034/saps.2025.61162.3205
Abstract
Background and Objective: This study aimed to evaluate the effects of plant growth-promoting rhizobacteria (PGPR) and different levels of chemical fertilizer on yield and yield components of camelina (Camelina sativa (L.) Crantz) an oilseed crop.
Materials and Methods: The experiment was conducted as a split-plot in a randomized complete block design with three replications at the Research Fields of Baye-Kala Agricultural Research Station. The treatments included two levels of chemical fertilizer (100 and 75% of chemical fertilizer consumption based on the soil test results as optimal and reduced levels of fertilizer, respectively) and four inoculation treatments with PGPR (separate inoculation of Ensifer sp., Bacillus megaterium, a co-inoculation and a control (non-inoculation)).
Results: According to the results the simple effect of chemical fertilizer and the interaction between chemical fertilizer and bacterial inoculation were not significant on all the studied traits, while most of the traits were significantly affected by the simple effect of bacterial inoculation. The separate inoculation of Ensifer sp., B. megaterium and co-inoculation increased the plant height (8.64-15.1%), the number of branches per plant (35.4-101.4%), the number of capsules per plant (27.2-81.7%), biological yield (13.1-25.1%), grain yield (27.0-45.1%), harvest index (11.7-14.8%), oil percentage in grain (11.4-19.8%) and oil yield (43.4-74.3%) as compared with the control conditions (non-inoculation).
Conclusion: The application of PGPR in a combined form (the best inoculation treatment) reduced the chemical fertilizers consumption without a significant reduction in camelina yield, which is indicating the importance of these rhizobacteria for achieving sustainable agricultural goals.
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