Abstract
Beneficial microorganisms play a key role in the availability of ions minerals in the soil and use Randomized Complete Block Desing ( R.C.B.D ). The objective of this paper to the study effect of the of biofertilizer and miniral treatments on availability of NPK for crop corn zea mays L.Two types of biofertilizer are Bacterial Bacillus subtilis and Fungal Trichoderma harianum. Three levels of potassium fertilizer are (2.9533, 0.4000 and 2.9533). A field experiment in fall season of 2018 Has been conducted in silty clay loam soil. The experimental Results indicated that Bacillus and Trichoderma inoculation separately or together Have made a significant effect to increase in the availability of N P K in the soil compare to other treatments. The grain yield is where (2.9533, 0.4000 and 2.9533) of bacterial and fungal bio-fertilizer and potassium fertilizers respectively as compared to the control.
Highlights
In terms of economic importance, corn, (Zea Mays L.) is the third most important cereal crops after wheat and rice
The results in Table (2) indicate that the application of the bacterial fertilizer (H1) The highest nitrogen concentration in the plant at the end of the season is increased with the highest nitrogen concentration (2.7467 kg N ha -1)as compared with the H0 treatment
This is due to the role of Bacillus bacteria which indirectly affects the stimulation of biologically stable and endemic microorganisms
Summary
In terms of economic importance, corn, (Zea Mays L.) is the third most important cereal crops after wheat and rice. Bioreactor treatment, which works to stabilize atmospheric nitrogen, dissolve phosphate and produce growthstimulating substances such as (IAA) and (GA) additional to decompose plant residues to pre-release and release nutrients and increase the content of humus in the soil It will be the beginning of a sustainable agricultural system that promotes the growth of plant root populations and high production in whole or in part with time for the use of mineral fertilizers, (5).Bio fertilizer were the most active free nitrogen- fixing bacteria. Soil microorganisms play an important role in regulating the movement of decaying organic matter and providing important nutrients for plants such as phosphorus, nitrogen, and carbon It increases the availability of different minerals the plants and leads to economically increase in the yield. PH degree Electrical conductivity EC Interchangeable capacitance of positive ions CEC
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