The Interaction Effect of Biofertilization and Nitrogen Fertilization Level on Growth and Yield Attributes of Rice | ||||
| Egyptian Journal of Agronomy | ||||
| Article 2, Volume 38, Issue 1, April 2016, Page 23-54 PDF (1.84 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/agro.2016.297 | ||||
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| Abstract | ||||
| THIS INVESTIGATION was carried out in the Experimental Farm, Ghazala Village, Fac. of Agric., Zagazig Univ., El-Sharkia Governorate, Egypt, during two successive seasons (2014 and 2015) to find out the effect of biofertilization with Cyanobacteria (Anabaena oryzae, Anabaena extract and the Anabaena + Anabaena extract) under four nitrogen levels (0, 25, 50 and 75 kg N/ fad·) on growth and yield of rice (Giza 178). The obtained results could be summarized as follows: biofertilization was effective to increase significantly grain, straw, and total yields/ fad particularly when Anabaena extract was tried through rice foliage at 10 and 25 days after transplanting. Mineral N fertilization failed to increase the rice grain yield/ fad and almost all yield attributes at harvest where the check N treatment recorded at par averages as those recorded due to the addition of 50 kg N/ fad where the further increase in N level was followed by significant decrease in this respect. However, plant height and physiological attributes at heading were significantly increased due to the increase of N level to 50 kg N/ fad. The bio. X mineral fertilization interaction affected grain yield/ fad and almost all yield attributes where the response equations predicted maximum grain yield/ fad of 4.26 ton due to a predicted addition of 54.1kg N/ fad. According to these results, a complementary effect could be traced between the foliar application of Anabaena and the 50 kg N/ fad level to maximize the grain, straw, and total yields/ fad. An eutrophication effect could had been taking place when Anabaena was soil added due to over growth by the algae particularly, during rice grain filling where a possible toxic effect and nutrient imbalance could have had played a role in ceiling the favourable effect of biofertilization observed up to heading particularly on plant height and greeness of leaves which was expressed in their content from chlorophyll and carotenoids. | ||||
| Keywords | ||||
| rice; biofertilization; Anabaena; Eutrophication; nitrogen fertilizer | ||||
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