T/PJDZ 0007-2017 The efficient fertilization technology for rice seedlings transplanted by machine in the coastal paddy area

Scope

Scope: This standard specifies the appropriate doses and corresponding fertilization techniques for the combined application of nitrogen, phosphorus, potassium, and trace elements in rice production on soils of different fertility in coastal rice-growing areas. This standard is applicable to high-yield, stable, high-quality, and efficient rice production in Panjin coastal areas and similar ecological regions, and can be used as a basis for enterprises to produce specialized rice fertilizers (formula fertilizers). Main technical contents: 1. High-efficiency nitrogen application technology. Under medium-to-high soil fertility conditions in Panjin rice-growing areas, the appropriate nitrogen fertilizer dosage for mechanically transplanted rice with a yield of 650–750 kg/667 m2 is 11–17 kg/667 m2 (calculated as pure N). The nitrogen fertilizer is divided into base fertilizer (slow-release nitrogen fertilizer) at 50–70%, tillering fertilizer (fast-acting nitrogen fertilizer, with a ratio of 4:6 between the first and second tillering fertilizers) at 20–30%, and panicle fertilizer (fast-acting nitrogen fertilizer) at 10–20%. The base fertilizer is applied before plowing or water-tilling; the tillering fertilizer is applied at the first and third leaf stages after rice transplantation; and the application time and dosage of the panicle fertilizer are determined based on leaf color. If the leaf color is normal, the panicle fertilizer (flowering inducer) is applied at the fourth leaf stage. If the leaf color is yellow and the number of plants is low, the panicle fertilizer can be applied at the beginning of the fifth leaf stage. If the leaf color is green, the application can be delayed appropriately.

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