The present investigation was carried out during the two successive seasons
2003 and 2004 at the Experimental Farm of Desert Environment Research Institute,
Minufiya University, EI-Sadat City to evaluate maize (zea mays L.) CV 30 K 8
productivity affected by four irrigation regimes Le. Ir,(40 minutes at morning daily -
3360 m3 Iseason), Ir 2 (50 minuets at morning daily - 4176 m3 Iseason), Ir 3 (40
minutes daily (20 minutes morning + 20 minutes before sun set) - 3360 m3 I season)
and Ir 4 (60 minutes day and day - 2544 m3 Iseason), three chemical nitrogen levels
(N1-60, N2- 100 and N3- 140 Kg N I fad) and four biofertilization treatments (Bio1-
untreated,Bio2- Nitrobin,Bio3- Microbin and Bio4- mexture of Nitrobin + Microbin).
The following results were recorded :-
Increasing nitrogen levels up to 140 kg N Ifad led to significantly increase plant
height, ear height, stem diameter, LAI, ear length, seed index, number of rows lear,
number of grains I row, grain yield plant (g), grain yield Ifad and N% in grains
compared with other N levels (60, and 100 kg /fad.
The effect of biofertilizer could be arranged as the mixture, Microbin, Nitrobin
and then untreated, where the highest values of all growth criteria, yield attributes,
grain yield Ifad and grain nitrogen percentage were achieved by application of the
mixture of Nitrobin and Microbin.
The highest values of plant height, number of rows lear, number of grains I
row,seed index, grain yield plant (g), grain yield Ifad and N% in grains were achieved
by application of Ir 3 followed by Ir 2, Ir 1 and then Ir4. Application of N3 (140 Kg N)
together with Bio 4 produced the highest values of plant height, seed index and grain
yield I fad, also, Bio 3 with 140 Kg N /fad significantly produced the highest LAI and
No. of grains Irow. Grain yield I fad produced by (Bio 4 X N 2) exc.~e,~d that
obtained by N3 without inoculation. Nitrogen fertilizer level N 3 combk:i~a~With Ir 3
produced the highest values of ear length, ear diameter, grain yield p~r.,pl~nt and per
faddan (19.22 ardab), While N 3 X Ir 1 produced the highest ear position and LAI.
Biofertilizer treatment (Bio 4) as a mixture of both Nitrobin and Microbin produced the
maximum values of ear heigh\ (with Ir 2), seed index, .grain yield Iplant and per faddan
(with Ir 3). Application of 140 Kg N Ifad (N 3) with Bio 4 and irrigated by Ir3 produced
the highest value of grain yield I fad 22.89 ardab and the highest value of water use
efficiency (0.95 kg grain I m3 water).
This study recommended to use biofertilizer as the mixture of both Nitrobin
and Microbin combined with 100 to 140 Kg N I fad and drip irrigation with 3360 m3
water in frequent irrigations two times daily in full plant life to produce good
production of maize grain yield in this region (EI-Sadat city).