2results about How to "Ensuring food security" patented technology

This invention presents a comprehensive evaluation method and application for mitigating microplastic toxicity in maize seedlings. It utilizes the biological concepts of relative mitigation effect index and absolute mitigation intensity coefficient for individual traits in maize seedlings affected by polystyrene (PS) microplastics, derived from the application of different concentrations of nano-zinc oxide (ZnONPs) / monolayer graphene (GO) solutions. This method scientifically, objectively, accurately, and comprehensively evaluates the overall mitigation effect and intensity of different concentrations of ZnONPs / GO solutions on PS microplastic toxicity in maize seedlings after 7 or 21 days of growth. Through comprehensive comparison, a scientific and efficient application method for mitigating PS microplastic toxicity in maize seedlings using ZnONPs / GO solution treatment is proposed. This invention is simple to operate, requires small amounts of ZnONPs / GO, is economical and practical, does not pollute the environment, and has a good overall mitigation effect on microplastic toxicity in maize seedlings, showing great potential for application in green, efficient, and clean maize production.

The invention provides a safe utilization method of a severely cadmium-polluted rice field, and relates to the technical field of rice cultivation in cadmium-polluted rice fields. The method comprises the following steps: measuring and selecting a field with the thickness of a ploughable soil layer being not less than 70cm; performing transformation, exchange, isolation and backfilling on 0-30cm surface soil and 30-60cm deep soil of the selected field, and curing the backfilled deep soil; then green manure is planted, and the green manure is subjected to rotary tillage and smashing in the vigorous growth period and evenly mixed with deep soil; planting a low-cadmium-accumulation rice variety on the treated soil, and respectively spraying a leaf surface blocking and controlling agent in the tillering stage and booting stage of rice growth, so as to safely produce and obtain the rice with cadmium reaching the standard. According to the method, on the premise that the cost is low, the soil layer exchange, isolation, fertile surface layer construction and other technologies are adopted, the cadmium content of the heavily-polluted rice field soil is greatly reduced, the remediation period is short, and the remediation effect is stable; meanwhile, by matching with an improved rice planting technology, the cadmium of the rice produced in the rice field with severe cadmium pollution can reach the standard.