High-efficiency nitrogen fertilization technology: Under medium and high soil fertility conditions in the Panjin rice area, the unit yield of machine-transplanted rice is (650-750) kg/667m2. The appropriate nitrogen fertilizer dosage is 11 kg/667m2-17 kg/667m2 (calculated as pure N). Nitrogen fertilizer is divided into base fertilizer (slow-release nitrogen fertilizer) 50% to 70%, tiller fertilizer (quick-acting nitrogen fertilizer, the ratio of primary and secondary tiller fertilizer is 4:6) 20%-30%, and ear fertilizer (quick-acting nitrogen fertilizer) 10% to 20%. Basal fertilizer is applied before rotary tillage or water harrowing; tiller fertilizer is applied at the 1st or 3rd leaf stage after rice transplantation; the fertilization time and amount of ear fertilizer depend on the leaf color. If the leaf color is normal, ear fertilizer ( Flower-promoting fertilizer) is applied at the fourth leaf stage. If the leaf color is yellowish and the number of plants is small, ear fertilizer can be applied at the early stage of 5 leaves. If the leaf color is greener, it is appropriate to apply less late fertilizer.
T/PJDZ 0007-2017 history
2017T/PJDZ 0007-2017 Technical regulations for high-efficiency fertilization of machine-transplanted rice in coastal rice areas