KẾT QUẢ NGHIÊN CỨU TUYỂN CHỌN GIỐNG ĐẬU TƯƠNG NAS-S1 CHO CÁC TỈNH PHÍA BẮC

Soybean variety NAS-S1 has been selected from 05 exotic soybean varieties in 2010. It has medium growth duration of 83-90 days and 2-3 days longer than DT84 at different seasons and locations. Average height stem of NAS-S1 is about 37.3- 49.2cm, number of mature pod per plant ranged from 22.8 to 28.2, percentage of pod with 3 seeds is from 21.1-38.6%. It gave average grain yield of 23.3-28.2 quintals/ha; 5.2-6.1 quintal/ha higher than soybean variety DT84 in spring and winter seasons. Grain yield of NAS-S1 is equivalent to that of DT84 in summer season. Soybean variety NAS-S1 is slightly resistant to rust, brown spot, and pod borers. Soybean variety NAS-S1 can be grown well in three seons per year in the Red River Delta.