大豆肥田机制的研究 Ⅰ.大豆生育过程中新老根系的更替  

STUDY ON MECHANISM OF SOYBEAN SOIL FERTILIZING OF SOYBEAN

作　　者：沈昌蒲[1] 龚振平[1] 王国义[1] 赵福华 

机构地区：[1]东北农业大学,150030

出　　处：《大豆科学》2000年第1期8-14,共7页Soybean Science

基　　金：国家自然科学基金

摘　　要：通过三种研究方法 ,证实了大豆从苗期开始已有老根不断腐解和新根不断生出的更替现象。通过方格差值法 ,在大豆生产期中进行五次测定 ,结果证明 ,6 - 8月之间大豆在田间每 0 .0 1 75 m3,5 0 cm深度至少有 1 1 30 .6 m根长和 2 5 5 .6个根瘤在土壤中生存和更替过。文中对大豆根系更替原因做了初步的分析。The object of this study is to verify that there is vigorous supersession of new and old roots in soybean various growing stages. Through the combining analysis of the data of 3 experimental methods (Solution culture, reduction of manganese oxide, square differential value), it is confirmed that in soybean exists a process of supersession of new and old roots from seedling to pod filling stages, and there are at least 6990.4cm of roots in length and 255.8 nodules in 0.0175m 3 which sustain decay from June to August. It shows that the supersession of new and old roots is an important link in the mechanism of soybean fertilizing soil.

关 键 词：大豆 根长密度 根系更替 生育期 土壤 

分 类 号：S565.1[农业科学—作物学]