山药主要以地下肉质块茎为食用部分,山药块茎和山药豆可食用和药用,市场需求量大,是我国传统的出口创汇土特产品。山药是高温短日照植物,全生育期160天左右,其中发芽期(从休眠结束芽萌动开始至出苗)35天左右,从出苗到现蕾并开始发生气生块茎约60天,块茎生长盛期约60天。生长期间要求高温、干燥的气候条件,在强光照条件下生长良好,生长适宜温度25~30℃,10℃以下植株停止生长,20℃以下生长缓慢,15℃以下不开花,地上部茎 Yam mainly underground meat tubers for the edible part of yam tubers and yam beans edible and medicinal, the market demand, is China’s traditional exports of native products. Yam is short-day high temperature plants, the whole growth period of about 160 days, of which the germination period (from the beginning of dormant bud sprouting start to 35 days, from emergence to budding and began to occur about 60 days of air tubers, tuberous growth period About 60 days. Growing period requires high temperature, dry climate conditions, grow well under strong light conditions, the growth of suitable temperature 25 ~ 30 ℃, 10 ℃ below the plant to stop growing, slow growth below 20 ℃, 15 ℃ below the flowering, stem above the ground