HIỆU QUẢ SẢN XUẤT ĐẬU TƯƠNG TRÊN ĐẤT SAU LÚA MÙA TẠI VÙNG ĐỒNG BẰNG SÔNG HỒNG

Currently, the production efficiency is not high soybean. There are multiple causes as releasing a new varieties into production is slow and inefficient. Soybean variety DT26 with high yield potential for winter-appropriate Red river Delta region but producers still lack technical information about this cultivar. Therefore, modeling soybean production in winter crop season with high efficiency is required. Frame of sowing time was from 15/9 to 30/9. Plant density was 45-50 plants /m2 . Fertilizer application for DT26 for 1 ha was: N: 100 kg; P: 450 kg; K: 150 kg plus 500 kg of lime powder. Grain yield get 2.27 tones/ha. Soybean yield of DT26 was higher than local varieties (51.4%) and earnings increased up to 13.304 million VND/ha. Net profit reached 22.1261 millions of Vietnam dong/hectare. Calculating the area of 300 ha scale, it reached 6,637.83 millions of Vietnam dong. Net aadditional interest, earnings per 1 ha/1 year with 2 times of rice crops and one winter soybean was 125.5 millions of Vietnam dong/year.