Abdollah Javanmard

In order to study the effect of vermicompost and chemical fertilizer residual on yield, yield component and quality of wheat (Triticum aestivum L.), a field experiment based on randomized complete block design (with 11 treatment and 4 replications) was conducted in University of Maragheh during 2021. Treatments included: 1- application of 50% of NPK fertilizers, 2- 50% NPK+ 3 ton of vermicompost, 3- 50% NPK+ 5 ton of vermicompost, 4- 50% NPK+ 7 ton of vermicompost, 5- 100% NPK, 6- 3 ton vermicompost, 7- 5 ton vermicompost, 8- 7 ton vermicompost, 9- 3 ton vermicompost+ (100% NPK- equivalent amount of nutrients in 3 ton vermicompost), 10- 5 ton vermicompost+ (100% NPK- equivalent amount of nutrients in 5 ton vermicompost), 11- 7 ton vermicompost+ (100% NPK- equivalent amount of nutrients in 7 ton vermicompost). Results showed the highest and lowest seed number per spike were observed after the application of 11, 4 and 1, 6 treatments, respectively. The greatest 1000-seed weight was achieved by application of 11 treatment that increased 15.88 and 6.31 percent in comparison with 50% and 100% of NPK treatments, respectively. Also, the greatest biological and grain yield were observed in 11 treatment. On the basis of results, the integrated nutrition 7 ton vermicompost with 100% NPK minus equivalent amount of nutrients in 7 ton vermicompost residual improved wheat quantity properties in comparison other treatments.