El—Naggar, M., Othman, S., Hanna, A., Shehata, A. (2005). EFFECT OF BIO AND ¡ OR MINERAL NITROGENOUS FERTILIZERS ON MAIZE AND WHEAT CROPS PRODUCTION AND SOIL FERTILITY. Journal of Soil Sciences and Agricultural Engineering, 30(2), 1306-1297. doi: 10.21608/jssae.2005.225986
M. El—Naggar; Sanaa A. Othman; A. M. Hanna; A. M. M. Shehata. "EFFECT OF BIO AND ¡ OR MINERAL NITROGENOUS FERTILIZERS ON MAIZE AND WHEAT CROPS PRODUCTION AND SOIL FERTILITY". Journal of Soil Sciences and Agricultural Engineering, 30, 2, 2005, 1306-1297. doi: 10.21608/jssae.2005.225986
El—Naggar, M., Othman, S., Hanna, A., Shehata, A. (2005). 'EFFECT OF BIO AND ¡ OR MINERAL NITROGENOUS FERTILIZERS ON MAIZE AND WHEAT CROPS PRODUCTION AND SOIL FERTILITY', Journal of Soil Sciences and Agricultural Engineering, 30(2), pp. 1306-1297. doi: 10.21608/jssae.2005.225986
El—Naggar, M., Othman, S., Hanna, A., Shehata, A. EFFECT OF BIO AND ¡ OR MINERAL NITROGENOUS FERTILIZERS ON MAIZE AND WHEAT CROPS PRODUCTION AND SOIL FERTILITY. Journal of Soil Sciences and Agricultural Engineering, 2005; 30(2): 1306-1297. doi: 10.21608/jssae.2005.225986
EFFECT OF BIO AND ¡ OR MINERAL NITROGENOUS FERTILIZERS ON MAIZE AND WHEAT CROPS PRODUCTION AND SOIL FERTILITY
Soil, Water and Environment Res. Inst., Agric. Res. Center, Giza, Egypt.
Abstract
This study was conducted during 2003 and 2003 — 2004 seasons at Gemmeiza Agric. Res. Stn., with maize (SC 15 hybrid) and wheat (Gemmeiza 7 var.), to findout the effect of bio — and / or N- fertilizers on yield production and soil fertility. The obtained results could be summarized as follows: The bio-ferlil,zer Azospirllum proved to be superior than Cyanobacteria one to increase, significant, maize grain and wheat(grain and straw) yields .Azospirillum still better than Cyanobactena in improving N-uptake, N-use efficiency, % biomass N recovered and available soil N for both crops. Increasing N-rate resulted in significant increases in maize grain and wheat(grain and straw) yields. Nitrogen concentration% of maize (grain and stover) and wheat(grain and straw) were increased significantly as N-rate increased. Nitrogen uptake and available soil N, after harvest, were increased, whereas, N- use efficiency tended to be reduced with increasing N-rate. Biomass-N recovered % for maize crop seemed to be increased with increasing N-rate 1whereas, an opposite trend was observed with wheat crop. Insignificant interaction effects were obtained due to the adopted biofertilizers and N-rates on the studied characters ,except the available soil N after maize harvest On conclusion, because of the inisignificant effect of adopted biofertilizers and N-rates , on the most investigated characters , it is recommended to apply the moderate N-rates under Azospirillum ¡n order the reduce the environmental pollution and to reduce, as well, maize and wheat production costs under Gemmeiza soil conditions
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