El-Sirafy, Z., Abd-El-Hameed, A., El-Mahdy, R. (2011). THE RESIDUAL EFFECT OF RICE N-BIOFERTILIZATION AS POTENTIAL ECONOMIC FOR MINERAL NITROGENOUS FERTILIZATION OF WHEAT CROP.. Journal of Soil Sciences and Agricultural Engineering, 2(7), 733-746. doi: 10.21608/jssae.2011.55657
Z. M. El-Sirafy; A. M. Abd-El-Hameed; Rasha E. H. El-Mahdy. "THE RESIDUAL EFFECT OF RICE N-BIOFERTILIZATION AS POTENTIAL ECONOMIC FOR MINERAL NITROGENOUS FERTILIZATION OF WHEAT CROP.". Journal of Soil Sciences and Agricultural Engineering, 2, 7, 2011, 733-746. doi: 10.21608/jssae.2011.55657
El-Sirafy, Z., Abd-El-Hameed, A., El-Mahdy, R. (2011). 'THE RESIDUAL EFFECT OF RICE N-BIOFERTILIZATION AS POTENTIAL ECONOMIC FOR MINERAL NITROGENOUS FERTILIZATION OF WHEAT CROP.', Journal of Soil Sciences and Agricultural Engineering, 2(7), pp. 733-746. doi: 10.21608/jssae.2011.55657
El-Sirafy, Z., Abd-El-Hameed, A., El-Mahdy, R. THE RESIDUAL EFFECT OF RICE N-BIOFERTILIZATION AS POTENTIAL ECONOMIC FOR MINERAL NITROGENOUS FERTILIZATION OF WHEAT CROP.. Journal of Soil Sciences and Agricultural Engineering, 2011; 2(7): 733-746. doi: 10.21608/jssae.2011.55657
THE RESIDUAL EFFECT OF RICE N-BIOFERTILIZATION AS POTENTIAL ECONOMIC FOR MINERAL NITROGENOUS FERTILIZATION OF WHEAT CROP.
1Soils Dept., Faculty of Agriculture, Mansoura University, Egypt.
2Plant Nutrition Dept., Soil, Water and Enviro. Res, Ins., Agric. Res. Center.
Abstract
This study was conducted during winter seasons of (2009-2010) and (2010-2011) at Meet Louza Village, Mansoura Province, Dakahlia Governorate, Egypt on a silty clay soil to find out the residual effect rice N-biofertilization on the next wheat crop (Triticum aestivum L. c.v. sakha 93). Biofertilization 8 treatments involving inoculums of Azolla (Azl), Azospirillum (Azs), Azotobacter (Azt), and Cyanobacreria (Cyn) as well as mixtures (Azl + Azs), (Azl + Azt), (Azs + Azt) and (Cyn + Azt) which take the same location with the same layout of the experimental field for the previous crop (rice), soil N- fertilization (4 treatments of control, 12.5 %, 18.75 and 25 % of N-recommended level 75 kg N fed-1 as urea) were tasted in a split plot design with three replicates. The most important finding could be summarized as follows:
Treatment of 25 % N-level led to highest increases for plant height, grain yield, chlorophyll (a) and (b) content and the highest values were (101.27cm, 1.57 Mg fed-1, 13.55 mg g-1 f.w and 8.95 mg g-1 f.w) for the previous parameters, respectively. Although, the highest straw yield, N, P, K, Fe, Mn and Zn uptake by grains of (1.31 Mg fed-1, 26.17, 4.27, 4.67 kg fed-1, 106.23, 47.91 and 48.33 g fed-1), were recorded at 18.75 % N-level, respectively. The highest mean value of caroteniods (2.75 mg g-1 f.w). achieved at, control treatment.
Inoculation of (Azl) gave maximum plant height and Mn-uptake of ((98.16 cm and 47.47 g fed-1), respectively. The highest grain, straw yields, caroteniods, N, K, Fe and Zn uptake were due to (Azs) Inoculation which were (1.84, 1.40 Mg fed-1, 3.48 mg g-1f.w, 27.13, 5.21 kg fed-1, 18.87 and 49.65 g fed-1) respectively, the highest P-uptake of (4.32 kg fed-1) occurred with (Azt). While (Azs+Azt) revealed the highest values (15.05 and 10.25 mg g-1f.w) for chlorophyll (a) and (b) content, respectively.
The combination of 25 % N-level with (Azl, Azs, Cyn, Azs +Azt, Azs and Cyn + Azt) inoculations, gave superiority plant height (106.38 cm), grain yield (1.95 Mg fed-1, chlorophyll (a), (b) (15.52, 13.39 mg g-1 f.w), Fe and Mn uptake of (137.32 and 55.49 g fed-1), respectively. The superiority average values of straw yield (1.53 Mg fed-1), N and Zn uptake (32.01 kg fed-1and 57.01 g fed-1), release from organic and inorganic (30.25ppm), N-uptake % (67.92%) and N-recovery % (61.66%) occurred with combination of (18.75%N-level + (Azl+Azs)), but 18.75 % N-level combined with (Azl) and (Azs) respectively gave highest P-uptake of (4.90kg fed-1) and K-uptake of (5.88 kg fed-1). The uppermost caroteniods (3.71 mg g-1f.w) occurred with the combination of (12.5% N-level + Azs) and The superiority net return (3060 £.L. fed-1.) of wheat crop, was given by combination of (25 % N-level + Azs).
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