The effect of different P fertilizer application (chemical, biologic and integrated) on forage quality of two barely varieties (Bahman and Fasieh)

Document Type : Scientific - Research

Authors

1 Agronomy Department, Tehran University of Agriculture and Natural Resources Campus, Tehran, Iran

2 University of Guilan

Abstract

Abstract
To evaluate the effect of different sources of P fertilizer on grain yield and yield components of two barely varieties, this experiment was conducted in Research Farm, College of Agriculture, University of Tehran in 2010. The experimental treatments were arranged as factorial based on randomized complete block design with three replications. The treatments consisted of two barely varieties (Bahman and Fasieh) and 7 levels of P fertilizer viz: 1. Control (no fertilizer application), 2. Chemical P fertilizer (based on the soil test), 3. Biological P fertilizer (P solubilizing bacteria), 4. Biological P fertilizer + 100% chemical P fertilizer, 5. Biological P fertilizer + 75% chemical P fertilizer, 6. Biological P fertilizer + 50% chemical P fertilizer, 7. Biological P fertilizer + 25% chemical P fertilizer. The results indicated that the ash percentage in Fasieh was significantly higher than Bahman at Chemical P fertilizer, integrated and Biological P fertilizer + 50% chemical P fertilizer. Except for Biological P fertilizer, DMD percentage was significantly higher in Fasieh compared to Bahman. The highest crude protein percentage was obtained for Fasieh in Biological P fertilizer + 50% chemical P fertilizer for Bahman in Biological P fertilizer + 75% chemical P fertilizer, respectively. The water soluble carbohydrate content was significantly higher in Fasieh at Chemical P fertilizer and integrated fertilizer treatments compared to Bahman variety. The highest NDF in Bahman was observed when received Biological P fertilizer + 50% chemical P fertilizer treatment, while the same results was obtained for Fasieh when received Biological P fertilizer + 100% chemical P fertilizer and Biological P fertilizer + 75% chemical P fertilizer.

Keywords


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