Preparation of a novel economically efficient and environment friendly controlled release urea from liquefied corn straw and castor oil.

Because of the renewable nature of castor oil, it has been widely used in the production of bio-based polyurethane (BPU) coated controlled-release fertilizer. However, although castor oil (CO) is a natural material, the polyurethane prepared from castor oil is still a product difficult to degrade. In order to further improve the degradability of castor oil-based polyurethane, six different BPU coated controlled-release urea were prepared using liquefied corn straw (LCS)-based polyols, castor oil, isocyanate as raw materials, glycerol and acrylamide as crosslinking agents.

Zinc oxide nanoparticles enhanced rice yield, quality, and zinc content of edible grain fraction synergistically.

Zinc oxide nanoparticles (ZnO NPs) have been widely used in agriculture as a new type of Zn fertilizer, and many studies were conducted to evaluate the effect of ZnO NPs on plant growth. However, there are relatively few studies on the effects of application methods and appropriate dosages of ZnO NPs on rice yield, quality, grain Zn content, and distribution. Therefore, in the 2019 and 2020, field trials were conducted with six ZnO NPs basal application dosages of no ZnO NPs, 3.

Improvement of bio-based polyurethane and its optimal application in controlled release fertilizer.

In the past decades, polyurethane has emerged as a new material that has been widely developed and applied in coated controlled release fertilizers (CRFs). Particularly in recent years, the excessive consumption of petroleum resources and increasing demand for sustainable development have resulted in considerable interest in bio-based polyurethane coated controlled-release fertilizers. This review article focuses on the application and progress of environmentally friendly bio-based materials in the polyurethane-coated CRF industry.