[Effect of N-fertilizer on ten varieties of barley under rainfall conditions in Jordan]
1985
Al-Tall, A. | Khattari, S. (Jordan Univ., Amman (Jordan))
Response of ten varieties of barley to different rates of N fertilizer was studied as fertilizer was added at rates of 0,2,4 and 8 kg/d. as ammonium sulfate. Biological yield, grain and straw yields increased with increase of N levels. Best response of different yield components was obtained at 4 kg N/d. Total yield of Beecher and local variety showed high response to the higher N level 8 kg N/d An increase of 105.7 and 90.7 kg. was obtained from both varieties respectively. Varieties as Composite Cross 89 and CR-336-11312 outyielded others in their grain production. An amount of 244.8 and 222.6 kg. was obtained from both varieties. Varieties Beecher, WI2291, and CR-336-11512 showed no significant increase in grain yield at N rate of 8 kg/d., while Dair Alla 106 variety showed no response to N fertilizer higher than 2 kg/d. for grain yield and straw. High straw production varieties were in the order of-CR-272-3-4; CR-336-11312; Composite Cross 89WI2291, Beecher at N rate 4 kg/d. The varieties showed low or no response to N rate higher than 4 kg/d. Highest grain-straw ratio 0.99 - 1.02 was obtained from the local selection Athenais and Composite Cross B9, while the lowest ratio 0.68 was obtained from the varieties CR-272-3-4 and WI2291. The 1000 grain weight was approximately constant for each variety at different N rates. Dair Alla106 gave the highest value 50.2 g. while Beecher gave the lowest value 37.1 g. Local varieties were similar in their grain production to ten other varieties, but lower in straw production. This property has to be improved due to the straw importance in animal feed. Best barley production, however, was at N level of 4 kg/d. under dry farming conditions
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