ANBAR JOURNAL OF AGRICULTURAL SCIENCES

Abstract

A study was conducted in the laboratories of Soil and Water Resources Department, College of Agriculture ,University of Anbar in the Fall season of 2011-2012 to prepare compost from some organic waste (mixtures of ground wheat straw and chicken wastes) of 30:1 and 40:1 C:N ratio enriched with 0.46% P by weight from either calcinated or raw of phosphate rock and inoculated with one of microbes solubilizing phosphate as that Pseudomonas fluorescence or Bacillus pumilus or Aspergills niger. All these combined materials exposed to the composting process for one month with adequate temperature, moisture and mixing intervals to from bio-organic fertilizer and to make some evaluation of the product.
The results showed that the combination of organic wastes of 30:1 C:N enriched with raw phosphate rock inoculated with P. fluorescence gave the highest percent of fulvic and humic acids at the end of composting process which were 11.7% and 12.36% respectively and the highest microbial density (2.037*106cfu.g-1).However, the combination of organic waste of 30:1 C:N enriched with calcinated phosphate rock and inoculated with P. fluorescence gave the highest available P.