Yield and Quality Analysis of Dioscorea opposita with Directional Cultivation Conditions
In order to improve and optimize the directional cultivation technology and clarify its production effectiveness, a field comparative experiment was conducted between the directional cultivation and traditional smash-ridging technology to explore the impacts of directional cul-tivation on the yield, quality, and taste of Dioscorea opposita.The experiment was repeated in three producing areas of Dioscorea opposita in Jiangsu Province.The results showed that the directional cultivation significantly increased the tuber biomass of individual plant and the con-tent of total saponin in Dioscorea opposita tubers.The delicacy of the tuber taste decreased and the hardness increased under the directional cultivation conditions.Overall, the application of directional cultivation technology could improve the yield and functional quality of Dioscorea opposita tuber, and should be preferentially promoted in the areas with sticky and heavy soils, where the vertical planting and harvesting opera-tions were hard to implement.
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