ĐÁNH GIÁ TIỀM NĂNG SẢN XUẤT CỦA ĐẤT THÔNG QUA MÔ HÌNH PHÁT TRIỂN CÂY TRỒNG TRÊN VÙNG ĐỒNG BẰNG SÔNG HỒNG

Mai Văn Trịnh¹, Trần Xuân Định²

¹Viện Thổ nhưỡng Nông hoá

²Trung tâm Khuyến nông Thái Bình

Từ khoá: đánh giá, sản xuất, lúa, đất, mô hình, Đồng bằng sông Hồng

Summary

Evaluation of potential soil productivity in the Red River delta using crop growth modeling

Potential and water limited yields for rice, maize and soybean in Tam Duong, northern district and Thai Binh, coastal province were calculated with a simulation model WOFOST. In Tam Duong, potential yield was 7,5 Mg/ha for rice, 7,1 Mg/ha for maize and 3,8 Mg/ha for soybean can be achieved. In Thai Binh: potential yield was 8,5Mg/ha for rice, 7,2 Mg/ha for maize and 3,6 Mg/ha for soybean can be achieved. Yield gap between potential and water limited production was large on sandy loam soil, whereas yield gap due water limitation was small on loamy soils. The model is able to simulate potential sowing time to get highest yield. Model outputs are important data base for assisting resources evaluation before setting up land use planning for the modern approach of Multiple Goal Linear Program subjective to optimal land use options.