Chemical Properties of Maize Residues under Application of Organic and Inorganic Nutrient Sources


Although the use of crop residues to enhance soil fertility has been suggested over the years, little is known about the nutrient composition of these residues as affected by specific nutrient management strategies. A study was conducted at the Soil Research Institute, Kwadaso, Ghana to examine the chemical properties of maize residues after application of different nutrient sources. The study was a field experiment arranged in a randomized complete block design. The treatments considered were application of poultry manure (PM), poultry manure + chemical fertilizer (PM + CF), chemical fertilizer (CF) and a control. Crop residues under CF application recorded the highest total N, P, K contents of 0.90%, 0.14%, and 1.19%, respectively. There were virtually no observable treatment effects on K, Ca and Mg contents of residues. The highest polyphenol (6.90%) and lignin (17.21%) contents were recorded under CF and PM + CF applications, respectively. The polyphenol: N ratios ranged from 7.7 in CF treated residues to 8.3 in residues on control plots. The study indicated that chemical fertilizer treated residues generally have higher nutrients composition and could have faster decomposition rate because of their lower polyphenol: N ratio than residues from all treated and untreated plots.



Logah, V. (Department of Crop and Soil Sciences, Lecturer,, 0322060332)

Place of Publication:

Research article published in International Journal of Environmental Science and Development, Vol. 2, No. 5, October 2011

Related Links

Half Term Report on the Stewardship of Professor William Otoo Ellis, Vice-Chancellor of KNUST

On the 1st of October, 2010, Professor William Otoo Ellis was appointed as Vice Chancellor for a four year term to steer the affairs of this great institution by the Council of this University. He was inducted into office on the 2nd of October, 2010 and swore the oath of service and was formally outdoored to the University Community and to the rest of the general public.