用~(32)P示踪研究再生稻根系物质流,结果表明,上层根是头季稻灌浆与成熟期的主要功能根系。再生稻苗期主要依靠上、下层根吸收矿质养分(~(32)P),而灌浆至成熟期,则主要依靠再生根,其次是上层根。 The root flow of ratooning rice was studied with ~ (32) P tracer. The results showed that the upper root was the main functional root system during the filling and maturing stage of the first season rice. The seedling stage of regenerated rice relies mainly on the upper and lower roots to absorb mineral nutrients (~ (32) P), while the filling to maturity depends mainly on the regenerated roots followed by the upper roots.