Effect of Phosphorus on Plant Growth and Phosphorus Uptake and Use Efficiency in Different Soybean Cultivars

A solution cultural experiment was carried out to study the effect of phosphorus levels on plant growth and development and phosphorus uptake and use efficiency in different cultivars of soybean(clycine max L.Merr) in Shanxi.The experiment results showed that the plant height,taproot length,root volume,leaves areas and dry weight in root and shoot of different soybean cultivars were significantly different under both low and high phosphorus levels.Phosphorus uptakes in different cultivars were significantly different under high phosphorus,but no significant differences under low phosphorus condition.The phosphorus use efficiency of Jindou No.11,Jindou No.4 and Jindou No.23 were higher than that of others under low phosphorus level,which indicated they are suited to plant in low phosphorus soils.Jindou No.10 and Jindou No.11 had higher phosphorus use efficiency under high phosphorus condition indicated that they are adapted to the soils with high available phosphorus.It is useful to exert different cultivar′s potential in using phosphorus and enhance phosphorus use efficiency.