On-farm field experiments were conducted to assess the impacts of some nitrogen (N) and phosphorus (P) bio-chemical fertilization regimes on wheat grain yield and its components and harvest index of wheat cultivar Misr-1. Experiments were conducted in a farmer's field, El-Sheikh Essa Viallage, Zagazig District, Sharkia Governorate, Egypt, during the two successive winter seasons of 2012-2013 and 2013-2014. The five nitrogen fertilization regimes (NFR) studied were (control ; 100 kg N/fad.; 75 kg N/fad. + cerealine; 50 kg N/fad.+ cerealine; cerealine) as well, the seven phosphorus fertilization regimes (PFR) studied were (control; 15 kg P 2 O 5 /fad.; phosphorien; mycorrhiza; 7.5 kg P 2 O 5 /fad. + phosphorien ; 7.5 kg P 2 O 5 /fad. + mycorrhiza ; phosphorien + mycorrhiza). Regarding the impact of (NFR), results show that, whatever the NFR applied, it caused significant increase over the control in each of spike No./m 2 , grain weight/spike, grain No./spike, 1000-grain weight, grain yield/fad., and harvest index. The appliance of the dual bio-chemical fertilizers i.e., (75 kg N/fad.+ cerealine) ranked at the top in grain yield/fad., and the main components i.e. spike number/m 2 , grain weight/spike, 1000-grain weight. As for PFR, results revealed that availability of phosphorus via the application of any PFR surpassed the control in each of spike No./m 2 , 1000-grain weight, harvest index and grain yield/fad. The PFR which included both chemical and bio-fertilizers i.e. (7.5 kg P 2 O 5 / fad. + phosphorien) outyielded other PFR, and was excellency in each of spike No./m 2 , grain weight/spike, grain number/spike and harvest index.
The study investigated the impact of eleven nitrogen and five phosphorus fertilization regimes on some leaf traits 70 days after sowing (DAS) of maize cultivar single hybrid 168. Results showed that, 120kg N/fad., from different sources i.e., chemical fertilizer, compost and biofertilizers were effectless on number of leaves/plant at 70 days after sowing (DAS) of both seasons and their combined analysis. Number of leaves either under or above the ear of mono eared maize plant were not affected due to applying different nitrogen fertilization regimes studied. Leaf area/maize plant was significantly affected in the first season only. The largest leaf erea/plant (4254.22 cm2/plant) was obtained in the first season, with the appliance of the integrated N fertilization regime (90 kg N from chemical fertilizer +30 kg N from compost). Area of leaves under ear resulted from the integrated fertilization regime (cerealine + 60 kg chemical N+ 60 kg N from compost) was larger than that in the control treatment by 30.94% based on combined results. Regarding to the area of leaves above the ear, results of the 1 st season displayed that area of leaves above the ear were at par in treatments N 2 , N 3 , N 4 , N 5 and N 6. Application of either 120kg chemical fertilizer (N 2) or 90 kg chemical N +30 kg N from compost (N 3) was conjucated with larger values of leaf area index comparably with other regimes. According to combined analysis, ear leaf area ranged from 481.87 cm 2 in control treatment to 625.89 cm 2 in the integrated nitrogen fertilization regimes comprised of cerealine + 60 kg chemical N/fad. + 60 kgN from compost. From the results of combined analysis, it could be noted that tassel leaf area ranged between 150.99 to 217.87 cm 2 under biofertilization (N 11) and the integrated fertilization regimes (N 8) in the same order. Insignificant phosphorus fertilization effect under study on maize leaf traits studied at 70DAS, was recorded in both seasons and the combined analysis.
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