对田间生长的大豆对钼的吸收和运转所进行的研究结果表明,直到花芽显现期:都几乎看不到钼的吸收。由此可见,大豆生长前期根瘤中钼的积累可能很大程度上取决于种籽中含有的钼。换言之,籽粒中的钼在植株生长前期或许对根瘤固氮都起了重要作用。六月中旬后,大豆植株开始吸收土壤钼、所有植株部位特别是根瘤钼浓度都增加。在籽粒充 Research on the uptake and transport of molybdenum by soybeans grown in the field showed that the uptake of molybdenum was barely detectable until flower bud development. Thus, the accumulation of molybdenum in the nodules at the early stage of soybean growth may largely depend on the molybdenum contained in the seeds. In other words, molybdenum in grains may play an important role in nodulation of nitrogen during the early stages of plant growth. After mid-June, soybeans began to absorb soil molybdenum, and all plant parts, especially nodules, increased in concentration. Filled in the grain