Joint control method for nitrogen and phosphorus emissions in farmlands

US11634369B2 · kind B2 · utility

Assignee

• Shandong Academy of Agricultural Sciences Institute of Agricultural Resources and Environment · CN

Inventors

• Yan-Lu Li · Nanhu, CN
• Longyun Fu · Jinan, CN
• Xiuchu Liu · Jinan, CN
• Yongping Jing · Jinan, CN
• Luji Bo · Jinan, CN
• Ming Sun · Jinan, CN
• Ziwen Zhong · Jinan, CN

Key dates

• Filing date: Mar 1, 2021
• Grant date: Apr 25, 2023
• Expiry date: Mar 4, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/40
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present disclosure provides a joint control method for nitrogen and phosphorus emissions in farmlands, comprising: reducing nitrogen and phosphorus input during crop sowing or planting by applying composite organic material and chemical fertilizer, wherein the composite organic material comprises: 200-250 parts of edible fungi residues, 300-350 parts of charcoal and 5-10 parts of rhamnolipid; constructing a nitrogen-phosphorus retention layer by utilizing composite microbial agent in combination with 150 parts of edible fungi residues and 20 parts of straw-based hydrogel; constructing a barrier layer by utilizing composite material, and controlling downward leaching of nitrogen and phosphorus that are not absorbed by crops, wherein the composite material of the barrier layer comprises: 25-35 parts of straw-based hydrogel, 20-30 parts of edible fungi residues, 35-55 parts of bentonite and 5-10 parts of corn flour.