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Effect of Some Plant Extracts Inhibitory Nitrification in The Mineralization of Nitrogen in The Soil Treatment of Various Organic Residues | ||
| Basrah Journal of Agricultural Sciences | ||
| Article 37, Volume 29, Issue 2, 2016, Pages 475-484 PDF (0 K) | ||
| DOI: 10.33762/bagrs.2016.123583 | ||
| Authors | ||
| Abdul Mehdi S. Al-Ansari; Muayad I. Ali | ||
| Abstract | ||
| An experiment was conducted in Laboratories of the College of Agriculture, University of Basrah to reveal of plants aqueous extracts of Caper seeds, Pomegranate peels , Date palm fiber and Blady grass rhizomes and chemical nitrification inhibitor Dicyandiamide (DCD) on nitrogen mineralization in soil treated with organic residues of poultry manure, cow manure, alfalfa Residue and corn cubs. Aqueous extracts were prepared at ratio of 1:10 ( plant material : water) and added to soil treated with 5% organic residue at concentration of 0.25 ml g-1soil. Soils were incubated at 30 °C for 15,30,45,60 and 75 days . After each incubation period set of samples were withdraw and NH4+, NO3¯ were determined. Results of the study showed that application of water extracts of Caper seeds increased NH4+-N but decreased NO3¯-N in soil treated with residues of poultry, cow and alfalfa compared with other extracts . However , at soils amendment with corn cubs residue highest NH4+-N concentration was obtained at DCD . Effect of Blady grass rhizomes and Date palm fiber extracts on N-mineralization differ according to organic residues source. Treated with Blady grass rhizomes decreased NH4+-N but increased NO3¯-N concentration at all extracts used . Results also showed that highest NH4+-N and NO3¯-N were associated with poultry manure and lower NH4+-N and NO3¯-N concentration were found in treatment of corn cubs. Increasing incubation time significantly increased NO3¯-N concentration but decreased NH4+-N concentration in soil at all treatments. | ||
| Keywords | ||
| Plant Extracts; Chemical inhibitor; Organic residues; N and NO | ||
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