低钾胁迫下不同耐钾性大豆品系生育特性比较  

Differences of Growth and Development Characteristics of Different Tolerance Soybean Strains to Low-potassium Stress

作　　者：李春红[1] 孙海鹰[1] 孙晶[1] 李兴涛[1] 曹敏建[1] 

机构地区：[1]沈阳农业大学农学院,沈阳110866

出　　处：《沈阳农业大学学报》2010年第6期654-657,共4页Journal of Shenyang Agricultural University

基　　金：沈阳农业大学青年教师基金项目(2005056)

摘　　要：以耐低钾大豆品系T40和不耐低钾大豆品系GD8521为试材,采用盆栽试验,设低钾和施钾2个处理,研究低钾下2个不同低钾耐性大豆品系生长发育特性的差异。结果表明:低钾胁迫下,T40的开花期延长,株高几乎没有变化,茎粗减小了11.40%,主茎节数增加了16.12%,分枝数减少了14.38%,分枝期茎秆干重降低了32.71%,结荚期植株干重降低了8.75%,结荚期叶片干重降低了5.56%,结荚期茎秆干重降低了2.65%,成熟期植株干重降低了3.74%,单株粒重降低了9.85%,茎秆和荚皮的干重增加了0.68%,单株荚数增加了9.13%,单株粒数减少了1.93%;而GD8521开花期缩短,株高降低4.94%,茎粗减小了27.5%,主茎节数增加了21.84%,分枝数减少了47.63%,分枝期茎秆干重降低了40.81%,结荚期植株干重降低了35.37%,结荚期叶片干重降低了26.53%,结荚期茎秆干重降低了37.89%,成熟期植株干重降低了38.58%,单株粒重降低了40.99%,茎秆和荚皮的干重降低了36.71%,单株荚数减少了23.55%,单株粒数减少了26.01%。低钾胁迫下,耐低钾品系T40的生长发育能保持较高的稳定性。Two soybean strains,T40 tolerant to low-potassium and GD8521 sensitive to low-potassium,were used to study the differences of growth and development characteristics in pot experiment under low and normal potassium treatments.Under low K treatment stress,the flowering stage of T40 was longer than under normal K treatment.Stem diameter and the number of branches reduced by 11.4% and 14.38%,respectively.However,the nodes of main stem increased by 16.12%.The stem dry weight reduced by 32.71% at branching stage.At podding stage,plant dry weight,leaf dry weight and stem dry weigh reduced by 8.75%,5.56% and 2.65%,respectively.The Plant dry weight,grain weight per plant reduced by 3.74% and 9.85% at maturity stage,while stem and pod husk dry weight increased by 0.68%.The pods per plant increased by 9.13%,while seeds per plant reduced by 1.93%.The results also showed that low-K stress made the flowering stage of GD8521 shorten.The Stem diameter and the number of branches reduced by 27.5% and 47.63 %,while the nodes of main stem increased by 21.84%.The stem dry weight reduced by 40.81% at branching stage.Plant dry weight,leaf dry weight and stem dry weigh reduced by 35.37%,26.53%,and 37.89% at podding stage,respectively.The plant dry weight,grain weight per plant and stem and pod husk dry weight reduced by 38.58%,40.99% and 36.71% at maturity stage,respectively.The pods per plant and seeds per plant reduced by 23.55% and 26.01%,respectively.T40 showed higher stability for growth and development characteristics and had more tolerance to low-K stress than GD8521.

关 键 词：耐低钾大豆 花期 熟期 植株性状 干物质积累 产量性状 

分 类 号：S565.1[农业科学—作物学]