2.7. Kỹ thuật bón phân bón Để đạt năng suất cao, phẩm chất tốt thì đậu tương cần được bón đầy đủ phân hữu cơ và các loại phân khoáng khác, quy trình bón phân cho cây đậu tương như sau: Liều lượng phân bón cho 1ha đậu tương trồng thuần là: Phân bón hữu cơ: 1012 tấn phân chuồng hoai mục, nếu được ủ bằng nấm Trichoderma thì rất tốt, vừa phân hủy tốt xác bã hữu cơ, vừa cung cấp một số chủng nấm đối kháng diệt một số nấm có hại trong đất trồng đậu tương. Vôi bột: 400500kg Dinh dưỡng nguyên chất : l020 kg N, 3060 kg P2O5, 4070 kg K2O tùy theo giống và mùa vụ. Phân bón khuyến cáo sử dụng: Đầu Trâu lạcđỗ. Thành phần 10% N, 14% P2O5, 14% K2O, các chất trung vi lượng như Ca, Mg, S, Zn, Fe, Mn, Mo, Cl, chế phẩm Penac của Đức được cân đối sẵn trong phân bón bón rất phù hợp với nhu cầu dinh dưỡng của cây.
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