超高产大豆根系活力和根瘤特性的比较研究

Comparison on Root Activity and Nodulation Characteristics of Super-highyielding Soybeans

以超高产大豆辽豆14、中黄35与普通品种辽豆11为试材,在盆栽条件下于不同生育时期比较超高产品种和普通品种根系活力和根瘤特性的差异。结果表明:R2期伤流量超高产品种与普通品种差异显著,根系活力则是普通品种辽豆11最大,但在R4和R6期超高产品种根系伤流量和根系活力均显著大于普通品种;R4和R6期,超高产品种根瘤重、固氮活性、固氮量均显著高于普通品种辽豆11。R2和R4期,施磷酸二铵100 mg.kg-1处理的根系伤流量和根系活力显著高于其它施肥处理。因此,超高产大豆品种在R4和R6期具有更强的根系生理功能。

In order to clarify the root physiological characteristics of super-high-yielding soybean, root activity and nodulation characteristics were determined through potted experiments with super-high-yielding soybean cv. Liaodou 14 and Zhonghuang 35, and common soybean cv. Liaodou 11 as materials. Root bleeding sap weight and root activity of super-high-yielding soybeans were much greater than those of common soybean at R4 and R6 stage, and root bleeding sap weight showed statistically significant differences at R2 stage between super-high-yielding and common soybean,while root activity of Liaodou 11 was maximum at R2 stage. Root bleeding sap weight and root activity were much higher than other fertilizer treatments under 100 mg. kg^-1 （NH4） 2P04 treatment at R2 and R4 stage. Nodule weight,nitrogenase activity and amount of nitrogen fixation of super-highyielding soybeans were also much greater than those of common soybean at R4 and R6 stage. Results suggest super-high-yielding soybeans had stronger root physiological activity at middle to late seed-filling stage.