磷硼耦合胁迫对大豆生长和磷、硼吸收的影响及基因型差异

以磷效率不同的5个大豆基因型为材料,通过水培试验研究磷、硼不同处理对大豆不同生育期植株生长和磷、硼吸收的影响及基因型差异.结果表明:磷、硼不同处理显著影响大豆生长,并且磷、硼对大豆生长的影响具有显著的交互作用.其中,磷有效性是影响大豆生长和硼吸收的重要因素.在相同硼水平下,增加磷有效性能显著提高各大豆基因型植株干质量、籽粒产量和单株磷硼积累量;在适量磷水平下,增加硼水平,能显著促进磷高效大豆基因型的生长和植株体内磷、硼的累积,但对磷低效品种则无显著影响.磷、硼对大豆生长的影响及其交互作用在成熟期表现更为明显,改善硼供应有利于提高磷高效大豆基因型的产量.

Effects of Phosphorus and Boron Coupled Deficiency on Soybean Growth, Phosphorus,Boron Uptake and the Genetic Variations

Five soybean genotypes contrasting in P efficiency were employed to investigate the effects of different P and B treatments on soybean growth,P,B uptake,and the genetic variations at different growth stages.The results showed: different P and B treatments significantly affected soybean growth,and there were significant interactions between P and B.Among which,P availability was the primary factor on soybean growth and B uptake.At the same B level,increasing P availability could significantly increase soybean plant dry mass,grain yield and P,B uptake.At the normal P level,increasing B availability only increased plant dry mass and P,B uptake of the P efficient genotypes,but not the P inefficient genotypes,particularly at mature stage.Improving B status could significantly increase the yield of P efficient soybean genotypes.