Field experiments were conducted to investigate the suitable cropping patterns of grain crops and medical plant Pinellia ternata in the two ripe and semi-arid region of southern Shanxi. Three cropping patterns were designed, including, wheat-Pinellia ternata intercropping(wheat/ Pinellia ternata), cole followed by sequential planting of Pinellia ternata (cole- Pinellia ternata) , and com-Pinellia ternata intercropping (com/Pinellia ternata). Of the three patterns, wheat/ Pinellia ternata was the best in economic yields and ecological benefits. Among the cultivars (cv. Xinjiang, Shangluo and Xihe) of Pinellia ternata tested, the cv. Xihe originated from relatively low temperature region exhibited the highestyield, while the cv. Xinjiang originated from relatively high temperature region had the lowest one, indicating that introducing Pinellia ternata cultivars from the areas with lower temperature to higher temperature areas could increase their yield. The yield of the cv. Xihe was 19.1% and 41.9% higher than that of the cv. Shangluo and the cv. Xinjiang. The cropping pattern of wheat/Pinellia ternata was the most effective one, with the yield being 53.4% and 70.8% higher than that of cole- Pinellia ternata and corn/ Pinellia ternata, respectively.%采用大田试验,设计冬小麦(Triticum aestivum Linn.)在春季起身后套作半夏[Pinellia ternata( Thunb.) Breit.](小麦/半夏)、冬油菜(Brassica campestris L.)收获后复播半夏[Pinellia ternata( Thunb.) Breit.](油菜-半夏)和春玉米(Zea mays L.)与半夏[Pinellia ternata( Thunb.) Breit.]间作(玉米+半夏)3种耕作模式,探讨晋南两熟半干旱区适宜半夏的“粮药”耕作模式.结果表明:与油菜-半夏、玉米+半夏耕作模式相比,小麦/半夏耕作模式经济产量最高,生态效益最好；不同半夏品种中,西河半夏(原产地温度相对最低)产量最高,新绛半夏(原产地温度相对较高)产量最低.表明半夏适宜于从低温地区引种到高温地区栽培,可提高产量.与商洛半夏和新绛半夏相比,西河半夏分别增产19.1％和41.9％；小麦/半夏耕作模式为最佳“粮药”耕作模式,其半夏产量与油菜-半夏和玉米+半夏耕作模式相比,分别增产53.4％和70.8％.
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