Ochuba C O, Chime C C, Udeozo P I, Ike O C, Agboeze E
Organic manure use to meet crop nutrient requirements is anticipated to become an inevitable practice for sustainable agriculture in the future, as it has been shown to improve soil physical, chemical, and biological qualities. It is also been frequently utilized to dispose of animal waste and reduce pollution. The objective of this study was to evaluate the influence of combination of organic material for enhanced 6-gingerol content of ginger hence field and laboratory experiments were carried out to evaluate this. The treatments used were Cow dung+ Sawdust at 50% each, Cow dung+ Poultry manure at 50% each, Poultry manure+ rice mill waste at 50% each, Rice mill waste + Sawdust at 50% each, absolute control(no amendments), Poultry manure+ Sawdust at 50% each, Cow dung +Rice mill waste at 50%each and Poultrymanure +Rice mill waste + Sawdust+Cowdung at 25%each.Eight treatments were used and replicated three times using randomized complete block design (RCBD). 6-gingerol content of the harvested ginger was quantified in the laboratory using reverse phase high performance liquid chromatography. Data analysis was done using Open source R environment version 4.1.0 statistical software. The result showed that combination of organic amendments enhanced the 6-gingerol concentration of ginger at different rates. The plot amended with cowdung+poultry manure gave the highest value which was significantly different from the absolute control. 6-gingerol content of other combinations of organic materials used in this experiment were also significantly different from the control. The rank order of 6-gingerol content among the treatments were > cowdung + Poultry manure (476.5089 ug/ml) > Cowdung +Ricemillwaste,(467.1398ug/ml)> PoultryManure+Ricemillwaste+Sawdust+Cowdung(455,4349ug/ml)>Poultry manure + Rice mill waste (449.0128 ug/ml) > Cowdung + Sawdust (444.8956 ug/ml) > Poultry manure + Sawdust (434.4819 ug/ml) > Rice mill waste + Sawdust (428.5675 ug/ml) > Absolute Control (270.1886 ug/ml).. The result showed that use of cowdung manure +poultry manure at the rate of 134g and 157g respectively for a 2m bed gave the best result among the organic combinations used in this study.
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