The effect of farmyard manure, nitrogen application on yield and yield components of barley varieties, Hordeum vulgare L. under saline conditions at Wadi Sudr South Sinai, Egypt

Two field experiments were carried out during 2002 per 2003 and 2003 per 2004 seasons under salinity conditions to study the effect of three farmyard manure compost application viz, 10, 20 and 30 m power 3 per fed. and three rates of nitrogen fertilizer, 40, 50 and 60 kg N per fed. and barley varieties Giza 129 and Giza 131 on yield and its attributes of hull less. The experimental treatments were arranged in split-split design. The main results were as follows : All studied characters except grain yield per plant, straw yield per fed. and harvest index were significantly differed from season to another. A significant increase in all studied characters was observed as farmyard manure, nitrogen fertilization and varieties barley. Results indicated that increasing farmyard manure from 10 to 30 m power 3 per fed. Significantly and gradually increased barley growth, yield and its components. Farmyard manure of 30 m power 3 per fed. gave the b est results for all studied characters. Also, increasing nitrogen fertilization levels significantly increased barley growth, yield and its components. Nitrogen level of 60 kg N per fed. gave the best results for all studied characters compared to the control 40 kg N per fed.. Barley varieties markedly differed in their yield and its components, Giza 131 variety significantly surpassed Giza 129 for all studied characters except harvest index. The interaction between farmyard manure and nitrogen fertilizer was statistically significant for all characters on yield and yield components. The interaction between farmyard manure and barley varieties was significant for plant height, grain weight per spike, biological yield per fed., carbohydrate percentage and protein percentage . Results showed that grain yield of Giza 131 cv. exhibit the highest response grain yield per fed. at the higher rates of farmyard manure compared to the other variety. The best results for all s tudied characters were recorded for variety Giza 131 and 30 m power 3 fed. farmyard manure. The interaction between nitrogen fertilizer and varieties of barley was significant for spike length, biological yield per fed., carbohydrate percentage and protein percentage. The best results for all studied characters were recorded for variety Giza 131 were obtained by 60 kg N per fed.