因地制宜,不失时机地抓好大豆生育中后期的田间管理,对促进大豆植株健壮生长,确保大豆子粒安全成熟致关重要,是获得大豆优质高产的重要保证。一、促控措施 1.根外追肥。在大豆生育后期,发现脱肥,公顷用15公斤尿素加1.5公斤磷酸二氢钾,对水750公斤,进行叶面喷洒,可促进大豆生长发育。 2.控高、促壮、防倒伏。7月中旬,对植株高大,生育繁茂,有徒长倒伏趋势的,公顷用60—80克,2· According to local conditions, lose no time in grasping the mid-late soybean crop field management, to promote the robust growth of soybean plants to ensure the safety and maturity of soybean is crucial, is to obtain high quality and high yield of soybean important guarantee. First, promote control measures 1. Root top dressing. Late in the soybean growth stage, hectare found, hectare with 15 kg of urea plus 1.5 kg of potassium dihydrogen phosphate, 750 kg of water, foliar spray, can promote soybean growth and development. 2. Control high, promote strong, anti-lodging. In mid-July, the plant height, longevity, leggy lodging trend, hectare with 60-80 grams, 2 ·