在平凉市对引进的5个山药品种进行了引种试验。结果表明，当地主栽品种平凉山药口感、品质均最好，折合产量16 042.86 kg/hm2；日本长白的农艺性状优良，折合产量19 035.71 kg/hm2，较对照品种平凉山药增产2 992.85 kg/hm2，增产率18.66%，口感好，品质佳，以上两品种适合在平凉地区推广种植。

A comparative experiment was carried out 5 introduced Chinese yam cultivars in Pingliang City. The results showed that the local main cultivar Pingliang Yams had the best taste and quality， with a yield of 16 042.86 kg/hm2； The yield of Japanese Changbai was 1 935.71 kg/hm2， which increased by 2 992.85 kg/hm2 and 18.66% compared with the control cultivar Pingliang， with good taste and good quality. The two cultivars are suitable to promote planting in a large area in Pingliang area.

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