Effect of PGPR, Phosphate sources and vermicompost on growth and nutrients uptake by lettuce in a calcareous soil. (2nd January 2018)

• Record Type: Journal Article
• Authors: Khosravi, Anahita; Zarei, Mehdi; Ronaghi, Abdolmajid
• Is Part Of: Journal of plant nutrition. Volume 41:Number 1(2018)
• Page Start: 80
• Page End: 89
• Publication Date: 2018-01-02
• Subjects: Calcareous soil -- insoluble phosphates -- lettuce -- Pseudomonas fluorescens; Plants -- Nutrition -- Periodicals; Plants -- Effect of minerals on -- Periodicals; Deficiency diseases in plants -- Periodicals; 575.76
• DOI: 10.1080/01904167.2017.1381727
• Languages: English
• ISSNs: 0190-4167

Abstract

ABSTRACT: In order to study the effect of plant growth promoting rhizobacteria (PGPR), vermicompost and phosphate sources on the growth and nutrients uptake by lettuce, a greenhouse experiments was conducted. Treatments consisted of PGPR ( Pseudomonas fluorescens ) (with and without inoculation), vermicompost (0 and 1% w/w) and phosphate sources (control, rock phosphate (RP), tricalcium phosphate and triple super phosphate (TSP) at 25 mg P kg −1 level). Biological fertilizers, RP and TSP significantly increased shoot dry matter (SDM) and some measured nutrients uptake. Co-application of PGPR and RP, in non-vermicompost treatments significantly increased SDM, shoot nitrogen, phosphorus (P), potassium, zinc and manganese uptake rates. Shoot P uptake had no significant difference between TSP and RP treatments. Co-application of PGPR, vermicompost and TSP significantly decreased SDM, which may be due to the P toxic levels in the plant aerial parts and/or the inhibition of the bacterial activities in the rhizosphere soil.