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研究表明：①麦茬复播大豆（晋豆20号）从7月对日至8月20日是一生中植株高度增长最快的时期，平均每天增高2.14cm，8月30日达到最高值；②7月20日至8月3日是叶龄发育最快的时期，平均每2．5d增加1个叶龄，8月20日达到最大叶龄;③8月5－20日为荚果形成的高峰期，8月24日左右达到最高值;④麦茬复播大豆全株干物质积累的高峰期在8月19目前后，在前后14d内积累的干物质占一生积累的干物质总量的35．8％；⑤荚果干物质积累的高峰期为9月2日前后，在此前后14d内积累的干物质占荚果总干重的52．5％。
The results showed that: (1) The stubble planting soybean (Jin Dou No. 20) from July to August 20 was the fastest growing period in the whole life, with the average increase of 2.14 cm per day and reaching the highest value on August 30; From the 20th to the 3rd of August, the leaf age was the fastest, with an average of one leaf age per 2.5 days and the largest leaf age on August 20; ③The peak of pod formation was from August 5 to August 20, August 24 reached the highest value; ④ stubble cropping soybean plant dry matter accumulation peak in August 19 after the current, accumulated 14d before and after the dry matter accounted for 35.8% of the total dry matter accumulation, ; ⑤The peak of dry matter accumulation in pods was around September 2, and the dry matter accumulated within 14 days before and after this time accounted for 52.5% of the total dry weight of pods.