Improving soil silicon and selected fertility status for rice production through rice‑mill waste application in lowland sawah rice feld of southeastern Nigeria


1 Federal College of Agriculture, Ishiagu

2 University of Nigeria

3 Mekelle University

4 Shimane University


Purpose Rice-mill wastes are generated in large amounts in Ishiagu, Ebonyi State, Nigeria. These wastes can potentially be utilized for rice production and in improving soil attributes. This study evaluated the efects of rice-mill wastes on soil chemical properties and rice yield in sawah rice management. Methods A sawah rice feld in an inland valley of southeastern Nigeria was used in 2014 and 2015 cropping seasons for the study. Sawah refers to an Indo-Malaysian term for rice paddy. It involves the manipulation of some soil physical properties in form of ecological engineering works, by bunding, puddling and leveling of lowland rice feld for water control and management. Two rice-mill wastes [rice husk ash (RHA) and rice husk dust (RHD) applied at 0, 2.5, 5, 7.5,10 and 12.5 t ha−1] and the control were built into a split-plot in a randomized complete block design with three replications. Results Bio-waste application had signifcant (p