Sinopec PBST biodegradable mulch film deployed in Yingkou 10,000‑mu rice project

Deployment in Yingkou project

The Yingkou 10,000‑mu rice membrane‑fertilizer‑machinery integrated project has applied Sinopec's PBST fully biodegradable mulch film. Compared with traditional planting models, the project reports substantial water and fertilizer savings, zero herbicide use, improved fertilizer utilization efficiency and reduced methane and other greenhouse gas emissions, supporting yield increases while delivering ecological and economic benefits.

Material and performance

PBST was developed by the Beijing Research Institute of Chemical Industry as a fully biodegradable material with fully independent intellectual property; more than one hundred patent applications have been filed. The PBST mulch film offers high mechanical strength and reportedly outperforms other fully biodegradable materials on UV resistance and water‑vapor barrier properties. Its degradation cycle is flexibly adjustable and the polymer has been applied in mulch films, film bags, foam packaging and other fields.

Integrated technology and machinery

In the Yingkou application the PBST film raises accumulated temperature and suppresses weeds during the rice growth period, then gradually biodegrades under suitable field conditions. The project pairs the material with a 'new materials + new agronomy + new agricultural machinery' system; a supporting film‑laying and rice‑transplanting integrated machine mechanizes film laying, film pressing and rice transplanting, making the PBST film a component of a complete mechanized rice production method.