تأثير التسميد الحيوي في جاهزية توليفات من الاسمدة النتروجينية والفوسفاتية في نمو وحاصل الذرة الصفراء ( Zea mays L. )

Effect Of Bio fertilizer on availability of Nitrogen and phosphate Fertilizer and Yield Component of Maize (Zea mays L.)

To study the effect of Bio Fertilizers on Increasing the Efficiency of the Use of Chemical Fertilizers(N,P) ,A field experiment was conducted during the spring season 2018 at fields of Ibn Al – Bitar Vocational Preparatory in Al-husainean / Kerbala , The experiment arranged in Factorial experiment with three factors by using Randomaized Completely Blokes Design ( R.C.B.D ) with three replicates , the first factor was three genotypes of maize
were (5018 ,Fajr1 and Baghdad3 V1,V2 and V3 , the second factor was the bio fertilizer (Control and Azotovit + phosphatovit ) were take the sample B1 and B2, and The third factor was Four levels of chemical fertilizer Urea(46%N) with Dap (50% P,18%N) were applied at rates of (control,100kg N h-1 + 33.33 kg P h-1, 200 kg N h-1 + 66.66 kg P h-1 and 300 kg N h-1 +99.99 kg P h-1 ) were take the
The results showed the following :-
1- The addition of bio-fertilizer (B2) resulted in a significant increase in most growth characteristics, including plant length (165.34 cm
2- ), area of flag leaf (138.9 cm2), number of rows in cob(15.683 row cob -1), length of cob (21.05 cm) , number of grain in cob (430.4 grains of cob -1), grain yield (8.16 μcg h-1), weight of 500 grains (200.4 g), bilogic yield (18.70 μcg h-1 ) In addition to increasing the proportion of protein in grains (12.63%).
3- The increase in the levels of chemical fertilizer with the addition of bio fertilizer resulted in an increase in the characteristics of growth and components of the product compared to the other levels of addition (C0, C1, C2) .
4- Results showed that the genotypes differed significantly in most study characteristics and the superiority of the Baghdad genotype on the other two varieties (5018 and Fajr) in all the characteristics of the study.
5- The Interference between the additions of bio-fertilizer (B2) with the fourth level of chemical fertilizer (C3) showed a significant effect on all the traits under study.
6- The effect of triple interaction between the levels of addition of bio fertilizer and the levels of chemical fertilizer with the genotypes in all the studied traits was significult The combination of the variety Baghdad ( V3) with the addition of the fourth level of chemical fertilizer (C3) and the addition of bio fertilizer (B2) Characteristics of the study were significant.
7- Increase the proportion of nitrogen, phosphorus and potassium in the soil after plant harvest with increased levels of chemical fertilization and the addition of bio fertilizer.