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一地上部生长发育西洋参播种出苗第一年全为三花(三小叶);二年生以批叶为主,占60％左右;三年生植株90％左右为三批叶;四年生也以三批叶为主,但4批叶比三年生多,出现少量双茎植株;五年生以4批叶为主,占65％以上,个别植株具有5批叶,双茎植株比四年生略多(图1)。各年生掌状叶并不一定是由五小叶组成,具三小叶、五小叶的比例也很高。西洋参的叶数多少,除了与年龄有关外,还与土壤肥力、田间管理等栽培技术有关。长势旺盛,根的生长快,批叶数也
A growth and development of the upper part of American ginseng seeding the first year of full three flower (three leaflets); biennial leaves with the main, accounting for about 60%; about 90% of three-year plants for the three batches of leaves; four-year-old also with three batches of leaves But four batches of leaves appeared more than three-year-old, a small amount of double-stemmed plants appeared. Five-year-old plants were dominated by four batches of leaves, accounting for more than 65%. Some plants had five batches of leaves. ). Palm annual leaves are not necessarily composed of five leaflets, with three leaflets, five leaflet ratio is also high. American ginseng leaf number, in addition to age, but also with soil fertility, field management and other cultivation techniques. Strong growth, rapid root growth, the number of leaves also approved