El-Sayed AA., Abo Elenein RA., Shalaby EE., Shalan MA., Said M.
3rd International Crop Science Congress (ICSC). August 17-22 (Hamburg) Germany : , 2000

Klíčová slova: Barley, Biofertilizer, Nitrogen fixation, seed inoculation
Abstrakt: Two field experiments were conducted in the 1995/1996 and 1996/1997 growing seasons in the new lands at Nubaria, which located at 46-km Southwest Alexandria, Egypt. Two experimental factors including mineral and bio-fertilizer in addition to different combination between the two factors were studied. Mineral fertilizer treatments were non-fertilizer (control), 140 kg N, 35 kg P2O5 and 140 kg N + 35 kg P2O5/ha. Biofertilizer treatments were non-inoculation (control), Microbin and Azottein. Biofertilizers (Microbin and Azottein) were constituted of mixture of different nitrogen fixers of the genera Azospirillum, Azotobacter, Klebsiella and Bacillus.... etc. Randomized complete block design was used with three replications. The plot size was 10.5 m2 including 15 rows of 3.5 m long and 20 cm apart. Results showed that grain yield reached about 2.81 and 3.60 ton/ha in the first and second season respectively due to application of 140 kg N + 35 kg P2O5/ha, with about 401.8 and 95.7% increase over the control. Microbin and Azottein caused significant increases in grain yield reached about 24.8 and 27.2% in the first season and 18.4 and 22.0% in the second season respectively compared to the un-inoculation. Application of 140 kg N + 35 kg P2O5/ha gave the highest straw yield, about 7.0 and 8.6 ton/ha with about 388.9 and 92.8% increase over the control in the first and second season respectively. Microbin and Azottein caused increases in straw yield reached about 15.6 and 7.8% in the first season and 4.6 and 4.7% in the second season respectively compared with the un-inoculated control. Application of 140 kg N + 35 kg P2O5/ha gave harvest index about 28.4 and 29.9 with about 0.0 and 0.7% increase over the control. Microbin and Azottein resulted in increases in harvest index by 1.1 and 6.3% in the first season and 10.0 and 13.1% in the second season respectively compared to the un-inoculated control. Highest number of tillers/m2 (291.3 and 495.9) was obtained from the application of 140 kg N + 35 kg P2O5/ha, with about 97.6 and 87.5% increase over the control in the first and second season respectively. On the other hand, Microbin and Azottein caused increases in number of tillers/m2 reached about 20.3 and 9.7% in the first season and 14.9 and 11.0% in the second season respectively over the un-inoculated control. Application of 140 kg N + 35 kg P2O5/ha resulted in spike length reached about 5.49 and 7.70 cm with about 35.6 and 102.1% increase compared to the control in the first and second season respectively. Inoculation of barley seeds with Microbin and Azottein resulted in spike length reached about 9.1 and 7.5% increase in the first season and 10.7 and 9.4% increase in the second season respectively compared to the un-inoculated control. The highest values of number of grains/spike 45.0 and 46.2, with about 25.7 and 24.9% increase over the control were obtained from the application of 140 kg N + 35 kg P2O5/ha. Microbin and Azottein gave increases in number of grains/spike reached about 10.2 and 11.8% in the first season and 10.6 and 7.3% in the second season respectively compared the un-inoculation. Application of 140 kg N + 35 kg P2O5/ha resulted in 1000-kernels weight reached about 48.3 and 50.9 with about 1.9 and 0.2% increase in the first and second season respectively compared to the control. Inoculation of barley with Microbin and Azottein caused increases in 1000-kernels weight reached about 1.1 and 4.5% in the first season and 1.6 and 8.8 in the second season respectively compared to the un-inoculation.
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