The chemical method mainly consists of chemically synthesizing a slowly soluble or poorly soluble fertilizer, and the fertilizer is directly or indirectly bonded to the preformed polymer by covalent or ionic bonding to form a novel polymer. The controlled release of slow/controlled release fertilizer produced by chemical method is better, but the nutrient supply is often insufficient at the initial stage of crop growth, and the cost is relatively high. Biological methods are the use of biological inhibitors (or accelerators) to improve conventional fertilizers. At present, the main target of biological inhibitor application is fast-acting nitrogen fertilizer, which mainly refers to urease inhibitor, nitrification inhibitor and ammonia stabilizer. The biological production process is simple, and the cost is low.
បច្ចុប្បន្នគោលដៅសំខាន់នៃកម្មវិធីទប់ស្កាត់ជីវសាស្រ្តគឺជីអាសូតលឿនដែលសំដៅទៅលើ urease inhibitor, nitrification inhibitor និង ammonia stabilizer ។ ដំណើរការផលិតជីវសាស្រ្តគឺសាមញ្ញហើយការចំណាយទាប។ ប្រសិទ្ធភាពនៃការបញ្ចេញសារធាតុចិញ្ចឹមគឺមិនស្ថិតស្ថេរទេនៅពេលប្រើតែឯងហើយរយៈពេលនៃការផលិតជីមានរយៈពេលខ្លី។ ហើយដំណើរការគីមីនិងគីមីនៃជីនិងបច្ចេកទេសកម្មវិធីជ្រៅនៃជីតែងតែត្រូវបានទាមទារ។