Diversified planting method for improving phosphate fertilizer utilization efficiency of sunflowers in saline-alkali soil

By planting salt-tolerant plants on saline-alkali land and using desulfurized gypsum and compound phosphorus-solubilizing microbial agents, the problem of low phosphorus availability in saline-alkali soil has been solved, improving the utilization rate of phosphate fertilizer and the yield of sunflowers, achieving a win-win situation for soil improvement and environmental protection.

CN122250346APending Publication Date: 2026-06-23TAIYUAN UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202610652070.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-13
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

The low availability of phosphorus in saline-alkali soils leads to extremely low utilization of phosphate fertilizer in sunflowers. Furthermore, traditional mulching cultivation causes secondary soil salinization, resulting in waste of phosphate fertilizer resources and environmental pollution risks.

Method used

When planting sunflowers on saline-alkali land, salt-tolerant plants such as wild soybeans and alfalfa are intercropped between rows. The soil is improved by using desulfurized gypsum and compound phosphorus-solubilizing microbial agents. Soil salinity and alkalinity are reduced and soil structure is improved through chemical and biological methods. The roots of wild soybeans are used to activate phosphorus and improve the utilization rate of phosphorus fertilizer.

Benefits of technology

It significantly improved the utilization rate of phosphate fertilizer, reduced the amount of chemical phosphate fertilizer used, improved soil structure, increased sunflower yield and economic benefits, and met the requirements of environmental protection and sustainable development.

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Abstract

The invention relates to the technical field of planting and fertilization, in particular to a diversified planting method for improving the phosphate fertilizer utilization efficiency of sunflowers in saline-alkali soil, and solves the technical problem that the phosphate fertilizer utilization efficiency of an existing sunflower planting method is too low. According to the method, the sunflowers are planted in a diverse mode, wild soybeans, suaeda glauca and alfalfa are planted in a diverse mode, inter-ridge crop covering for reducing evaporation and inhibiting salt is achieved, a composite phosphate-solubilizing microbial agent containing bacillus subtilis, bacillus megatherium and pseudomonas fluorescens is matched, the activity of soil phosphate-solubilizing microorganisms is enhanced, and the growth period of the sunflowers is subjected to precise water and fertilizer integrated management, so that the yield of the sunflowers is increased. Fertilizers such as urea, potassium sulfate and monopotassium phosphate are dripped according to the requirements of different growth periods, so that sufficient and balanced nutrition supply is ensured. The diversity planting method obviously improves the phosphate fertilizer utilization efficiency of the saline-alkali soil, is suitable for practical application of the saline-alkali soil, and has wide popularization value.
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