Efficient use of pulping wastewater and distillery slop as potassium sources for maize planted in Sansai soil series
2002
Supamard Panichsakpatana(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) | Chairerk Suwannarat(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Soil Science) | Kokiat Chairatsamikul(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Soil Science)
First experiment was performed in laboratory to study the property of pulping wastewater and distillery slop, and the influence of these two wastes on K content in Sansai soil series. The experimental results showed that the pulping wastewater was strongly alkaline, high in electrical conductivity, high in K content as much as 7,400 mg/l but low in other plant nutrient contents. The distillery slop was very strongly acid, high in electrical conductivity, high in K content as much as 16,300 mg/l and considerably high in nitrogen calcium and sodium content. Sansai soil series was moderately acid soil, low in exchangeable K and organic matter content and low in cation exchange capacity. The application of both wastes water to Sansai soil increased available potassium in the soil. Release of K from the distillery slop in Sansai soil was more or less the same rate as that from the KCl but it was considerably faster than that from the pulping wastewater. The second experiment was the pot trial in order to study the possibility of using the pulping wastewater and the distillery slop as K source for baby corn planted in Sansai soil series. Pot experiment showed that pulping waste water and distillery slop had efficient as potassium fertilizer nearly potassium chloride. Both waste water increased growth, yield and potassium nitrogen and phosphorus uptake of maize. Particularly, straw weight of slop treated pots was higher than control treatment and pulping wastewater increased grain weight more than potassium chloride and control treatment. The application of both wastes did not affect the soil pH and electrical conductivity. The result of this study indicates that the pulping wastewater and the distillery slop can be use as the potassium source for baby corn planted in Ubon soil series.
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