毛豆又称菜用大豆,系收获子粒饱满而尚未老熟的青豆,其根系与根瘤菌共生固氮,在整个生长期吸收的氮素营养较钾素少。为探索毛豆优质、高 Soybeans, also known as soybeans, is a green bean that is full of seeds but not yet ripe, and symbiotic nitrogen fixation of its root system with rhizobia. Nitrogen nutrition is absorbed less than potassium throughout the growing season. To explore the high-quality soybeans, high