Topdressing-free fertilizing method capable of increasing wheat yield

By using a three-layer compound fertilizer and dynamic adjustment technology, the problems of weather-dependent timing of topdressing and low nitrogen fertilizer utilization in wheat fertilization have been solved. This has enabled the matching of nitrogen supply throughout the entire growth period of wheat, improving yield and quality, and reducing production costs and environmental pollution.

CN122404068APending Publication Date: 2026-07-17云南省农业技术推广总站 +1
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Patent Information

Application Number
CN202610656320.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-13
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing wheat fertilization methods suffer from weather-dependent timing of topdressing, short operating windows, high production costs, low nitrogen fertilizer utilization, and difficulty in meeting nitrogen requirements throughout the entire growth cycle, thus affecting yield and quality.

Method used

This compound fertilizer uses a three-layer structure: the inner layer contains fast-acting nitrogen fertilizer and inhibitors, the middle layer contains slow-release nitrogen fertilizer and enzyme activators, and the outer layer contains controlled-release nitrogen fertilizer and sugar synergists. Through a functional spatiotemporal coupling structure, it achieves matching of nitrogen release with the nitrogen requirements of wheat during its growth period. Combined with dynamic adjustment of inhibitor dosage, it achieves one-time basal application without the need for topdressing throughout the entire growth period.

Benefits of technology

It significantly extends the fertilizer's effective period, improves nitrogen fertilizer utilization, increases yield and quality, reduces labor costs, minimizes ammonia volatilization losses, and improves environmental benefits.

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Abstract

The invention provides a topdressing-free fertilizing method capable of increasing wheat yield, which adopts a granular compound fertilizer, and the granular compound fertilizer comprises the following components from inside to outside: an inner layer core comprising a quick-acting nitrogen fertilizer, a urease inhibitor and a nitrification inhibitor; the middle layer comprises a slow-release nitrogen fertilizer and an enzyme activation substance; the outer layer comprises a controlled-release nitrogen fertilizer and a sugar synergistic substance; the inner layer, the middle layer and the outer layer form a functional space-time coupling structure, so that nitrogen release is matched with the nitrogen requirement rule in the growth period of wheat, and the fertilizer efficiency period reaches 110-120 days. In the inner layer core, a urease inhibitor is selected from NBPT (N-butylthiophosphoric triamide) or a derivative thereof, and a nitrification inhibitor is selected from DMPP (3, 4-dimethylpyrazole phosphate) or DCD (dicyandiamide); the effective nitrogen supply period of the compound fertilizer reaches 110-120 days, the whole growth period of wheat is covered, one-time basal application is achieved, topdressing is not needed in the whole growth period, the fertilization operation is reduced by 2-3 times, and the labor cost is greatly reduced.
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