Utilization of wastewater from sa paper (paper mulberry, Broussonetia papyrifera (L.) Vent) processing as a potassium source for corn and chinese kale
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) | Wanida Nobuntou(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Soil Science)
Stage 1 was subdivided into two experimental programs. Chemical analysis of the wastewater indicated that it was highly alkaline (pH 10.6), contained a high K content of 5,900 mg/Kl, had an electrical conductivity of 13.05 mS/cm and was low in plant nutrients. In contrast, Roi Et soil series and Ubon soil series were highly acidic and low both K and organic matter. The stage 1 results also indication that the application of the wastewater to Roi Et soil series increased available-K content and the rate of K-release. Similar results occurred following KCl fertilizer application. The pots experiments(Stage 2) indicated that the wastewater from sa paper processing applied to corn grown in Roi Et soil series increased K-uptake and hence corn growth and yield. Similar results were obtained following the application of KCl. For Chinese kale grown on Ubon soil series, the wastewater enhanced the growth and yield of the vegetable more evidently than that of corn. However, increasing the application rate of the wastewater from 50 to 100 mg K2O/kg resulted in yield declining. Application of the wastewater at any rate resulted in higher Chinese kale as compared with yield associated with all the KCl treatments. The application of wastewater from sa paper processing to Roi Et soil series and Ubon soil series at the investigation rates of 25, 50 and 100 mg K2O/kg did not alter soil pH or EC in all corn and Chinese kale growth stages. The results of this study indicate that the wastewater from sa paper processing can be utilized as an effective source of K for corn grown of Roi Et soil series and for Chinese kale grown on Ubon soil series.
Mostrar más [+] Menos [-]Palabras clave de AGROVOC
Información bibliográfica
Este registro bibliográfico ha sido proporcionado por Kasetsart University