Effect of flavobacterium, vermicompost, and humic acid on current photosynthesis, dry matter translocation, and grain yield of Triticosecale Wittma L. under salinity stress conditions

A factorial experiment was conducted on Triticosecale Wittma L. based on a randomized complete block design with three replications in Research Greenhouse of the Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabil during 2020. Experimental factors included salinity levels (non-application of salinity as control and soil salinity of 50 and 100 mM NaCl), and bio-fertilizers (no application of bio-fertilizers as control, application of vermicompost, flavobacterium, vermicompost + flavobacterium + humic acid (foliar application with water as control and foliar application of 2 g.L-1 humic acid). Results showed that the highest leaf area index, root weight and volume, and leaf protein content were recorded in combined applications of vermicompost + flavobacterium + foliar application of humic acid under non-salinity conditions. Also, combined application of vermicompost + flavobacterium + foliar humic acid under non-salinity conditions decreased dry matter translocation from stem, shoot, and its contribution to grain yield by 31.97, 40.8, and 138.84% respectively while increasing grain yield, current photosynthesis, and contribution of current photosynthesis in grain yield by 69.56, 151.44, and 48.3%, respectively compared to no application of bio-fertilizers and humic acid under 100 mM soil salinity. Based on the results, it seems that the application of bio-fertilizers and humic acid can increase current photosynthesis and its contribution in grain yield of triticale by improving leaf area index, root weight, and volume.