在盆栽土培条件下,采用不同耐低磷基因型508、580、99011、99112和低磷敏感基因型99012、99056为材料,研究了不同生育时期低磷胁迫对水稻铁、锰吸收和积累的影响.结果表明,不同磷效率水稻基因型间茎叶相对铁、锰含量差异并不明显.分蘖期时,低磷胁迫条件下,低磷敏感基因型水稻茎叶铁含量显著下降,耐低磷基因型受到的影响明显小于低磷敏感基因型.孕穗期时,只有99056茎叶铁含量在低磷胁迫时显著降低;而茎叶锰含量除99112外其它基因型均显著降低.至成熟期,由于受转移效率的影响,水稻茎叶铁、锰含量变化明显比前期复杂.低磷胁迫条件下,耐低磷基因型水稻籽粒铁、锰含量呈下降趋势,低磷敏感基因型籽粒铁、锰含量呈上升趋势.低磷胁迫降低了铁、锰在水稻地上部的积累量.在生育前期,耐低磷基因的铁、锰积累量显著高于低磷敏感基因型;生育后期,耐低磷基因型的绝对积累量优势消失,但相对积累量优势变大.图4表4参25 Under the condition of pot culture, the different phosphorus tolerance genotypes 508,580,99011,99112 and low-phosphorus sensitive genotypes 99012 and 99056 were used to study the effects of phosphorus deficiency on iron and manganese absorption and accumulation in rice at different growth stages .The results showed that there was no significant difference in the relative iron and manganese content between the different genotypes of rice genotypes at the tillering stage.The contents of iron in stems and leaves of low-phosphorus-sensitive genotypes decreased significantly under low-phosphorus stress, Genotypes were significantly less than those of low-P-sensitive genotypes, and only the content of iron in leaves of 99056 decreased significantly under low-P stress at booting stage, whereas the other genotypes of all leaves except 99112 decreased significantly at booting stage, Due to the effect of transfer efficiency, the content of iron and manganese in the stems and leaves of rice was significantly changed than that in the previous period. Under the condition of low-phosphorus stress, the content of iron and manganese in grains of low-phosphorus-tolerant rice showed a decreasing trend. Phosphorus content reduced the accumulation of iron and manganese in aboveground parts of rice.The accumulation of iron and manganese of low-phosphorus-tolerant genes was significantly higher than that of low-phosphorus-sensitive genotypes in the early growth period, base Due to the type of absolute accumulation disappears, but the advantages of relative accumulation become larger.