Efficient use of pulping waste water and distillery slop as potassium fertilizer for rice grown in Ubon soil series
2002
Chairerk Suwannarat(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Soil Science) | Jongruk Chanchareonsook(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Soil Science) | Supamard Panichsakpatana(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Soil Science) | Rawiya Thongyon(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Soil Science)
Study on efficient use of pulping waste water and distillery slop as potassium fertilizer for rice grown in Ubon soil series was divided into two experiments. The first experiment was conducted in laboratory. Results of laboratory experiment showed that pulping waste water had high electrical conductivity and extremely high basic reaction, high potassium of 7,480 mg/l and low in other nutrients. The distillery slop had very high electrical conductivity, extremely acidic reaction, and high potassium of 16,345 mg/l with high content of nitrogen, calcium and magnesium. Ubon soil series has loamy sand texture with pH of 4.8 and very low potassium and organic matter content. Under stagnant condition, application of the two waste waters increased the available potassium in Ubon soil series. The pulping waste water has a tendency to release potassium more slowly than that of the distillery slop and potassium chloride fertilizer. The second experiment was a pot. It was found from the pot experiment that both the pulping waste water and the distillery slop can effectively be used as potassium fertilizer comparable with potassium chloride fertilizer for Suphan Buri 1 rice grown in Ubon soil since they could clearly increase yield and potassium uptake of rice. Particularly in rice yield, it was found that both waste waters can give the rice grain weight at 14 percent moisture similar to that of potassium chloride fertilizer and more than that of control. The use of both waste waters has only slight effect on soil electrical conductivity and soil reaction values. Therefore, the pulping waste water and the distillery slop can be used as potassium fertilizer for rice grown in Ubon soil series.
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