Growth and Yield of Sweet Potato (Ipomoea batatas L.) in Rice Fallows: Effect of Tillage and Varieties
Keywords:
Tillage, sweet potato, yield attributes, root yieldAbstract
A field experiment was conducted for two years (2005-2007) under rice-fish farming system in deep water ecology (>50 cm water depth) at the Experimental Farm of the Central Rice Research Institute, Cuttack, India, to study the performance of different varieties of sweet potato (Ipomoea batatas L.) under different methods of tillage in lowland rice fallow. Conventional tillage resulted in higher yield and yield attributes over minimum tillage due to compressed storage root growth under the latter condition. Minimum tillage decreased the bulk density and increased the penetration resistance. Thevariety Sourin produced higher tuber yield under minimum tillage, while Kishan responded better to conventional tillage. Minimum tillage resulted in70% of the root yield and 90% of vine yield. However it could reduce the crop duration by 20 days and water requirement by 12 cm. The study indicated that for higher cropping intensity and utilization of residual excess moisture, sweet potato crop can be grown in lowland rice fallow with irrigation and also in rice-fish system in deep water situation with the variety Kishan under conventional tillage and Sourin under minimum tillage conditions.References
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