论文部分内容阅读
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。
Through three kinds of research methods, it was confirmed that the replacement of the old roots with the decay of the old roots and the emergence of the new roots of the soybean began from the seedling stage. Through the square difference method, five determinations were made during the soybean production period. The results showed that the soybean field in June-August had a root length of at least 11 30.6 m And 25.56 nodules survived and replaced in the soil. The article made a preliminary analysis of the root causes of soybean replacement.