Quality of the organic fertilizer: the case study in Phatthalung province [Thailand]
2009
Chindachia, R. | Khuankhamnuan, C. | Tanpanich, S.
The problem of producing organic fertilizer so far could not meet the standard of Department of Agriculture. Therefore this project aimed to survey the material, methodology and quality organic fertilizer in Phatthalung as well as to give the recommendation/advice to organic fertilizer producers in Phatthalung. The samples of organic fertilizer before and after recommendation were taken and analyzed in laboratory. There were 3 kinds of organic fertilizer classified by texture, i.e., powder, pellet and granule. Mainly they produced powder organic fertilizer followed by granule and pellet by 61.11%, 22.22% and 16.67%, respectively. The base materials to produce organic fertilizer were animal manure such as cow manure, layer poultry manure and pig manure which they used as a single or mixed material together with sawdust, rice husk, rice husk charcoal, rice hull, rock phosphate, bioextract and urea. Based on the organic fertilizer standard of Department of Agriculture 2008, the overall evaluation in terms of electrical conductivity (EC), organic matter (OM), C:N ratio, moisture content, N, P, and K, all groups of organic fertilizer producers did not pass. However the individual evaluation showed that C:N ratio and K were 100% satisfied followed by moisture content, P, N, EC and OM by 94%, 75%, 69%, 56% and 12%, respectively. TISTR advised and recommended the ratio of material and methodology of composting to producer during mid 2006, the quality of organic fertilizer after that improved i.e. the overall evaluation was 69% passed. Meanwhile individual evaluation showed more percentage passed as well. The parameter that seldom met the standard was OM, however the percentage passing increased from 12% to 69% after advise was given. Moreover, it was found that the quality of powder organic matter was superior than pellet and granule organic fertilizer.
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