ROLE OF BIOFERTILIZATION AND DIFFERENT RATES OF NITROGEN WITH FOLIAR SPRAYING OF NITROGEN AND YEAST IN RICE PRODUCTIVITY AND NUTRIENT UPTAKES. | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 1, Volume 2, Issue 7, July 2011, Page 717-731 PDF (562.03 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2011.55655 | ||||
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| Authors | ||||
| Z. M. El-Sirafy1; A. M. Abd-El-Hameed2; Rasha E. H. El - Mahdy2 | ||||
| 1Soils Dept., Faculty of Agriculture, Mansoura University, Egypt. | ||||
| 2Plant Nutrition Dept., Soil, Water and Enviro. Res, Inst. Agric. Res. Center. | ||||
| Abstract | ||||
| Field experiments, on rice crop (Oryza Sativa L. c.v. Giza 178) grown in Meet Louza Village, Mansoura Province, Dakahlia Governorate, Egypt were conducted in 2008 and 2009 seasons on a silty clay soil. Biofertilization 8 treatments involving inoculums of Azolla (Azl), Azospirillum (Azs), Azotobacter (Azt), and Cynobacreria (Cyn) as well as mixtures (Azl + Azs), (Azl + Azt) (Azs + Azt) and (Cyn + Azt), soil N-fertilization (4 treatments of no-N, portions of 50 %, 75 % and 100 % of N-recommended level of 60 kg N fed-1 as urea), and foliar spray of (2 treatments of yeast extract only, and yeast extract + 2 % N) were tasted in a randomized complete block design (factorial) involving the 3 above mentioned factors. Execution of experiment was a split- split plot with three replicates. The highest grain yields of (3.99 and 4.07 metric t fed-1) in 1st and 2nd seasons occurred with the treatment of (Cyn + Azt) + 50 % N-level + (2 % N + yeast). The highest straw yields were given by (Cyn + Azt) + 100 % N-level+ yeast which gave 3.94 metric t fed-1 in 1st season, or by (Cyn + Azt) + 100 % N- level+ (2 % N + yeast) which gave 4.10 metric t fed-1. The highest weight per plant (at booting stage) was due to (Azs + Azt) + 50 % N-level + (2 % N + yeast) which were125.14 and 137.65 g dry matter plant-1 in 1st and 2nd seasons, respectively. The highest N-uptake by grains of 59.84 and 66.62 kg fed-1 for 1st and 2nd seasons, respectively occurred with (Azl) + 100 % N-level +(2 % N + yeast). The highest P-uptake by grains occurred with (Azl + Azt) + 50 % N-level (2 % N + yeast) which gave (7.51 and 9.46 kg fed-1) in 1st and 2nd seasons, respectively. The highest K-uptake occurred with (Cyn + Azt) + 50 % N-level + (2 % N + yeast) which gave 12.76 and 14.62 kg fed-1 in 1st and 2nd seasons respectively. The highest Fe-uptake of 259.89 and 308.44 g fed-1 in 1st and 2nd seasons respectively, were given by (Azs + Azt) + 75 % N-level + (2 % N + yeast). The highest Mn-uptake of 185.36 and 214.18 g fed-1 in 1st and 2nd seasons respectively occurred with (Cyn + Azt) + 100 % N-level + (2 % N + yeast). The highest Zn-uptake of 151.52 and 171.52 g fed-1 in 1st and 2nd seasons, respectively occurred with (Azl + Azs) + 50 % N-level + yeast. | ||||
| Keywords | ||||
| N fertilization; biofertilizer; foliar application; yeast and rice plant | ||||
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