Water retainer is a kind of agricultural product that is more used in agriculture, so what is the main role of water retaining agent?
In fact, the role and efficacy of water retainers are more extensive. The absorption force is relatively strong, and the time for the natural number to be absorbed in the saturated state is about 15 to 40 minutes, and it can be absorbed and released multiple times. Water retainers can absorb a certain degree of used fertilizers and pesticides, and then slowly release them to achieve better fertilizer efficiency and medicinal effects, and can also improve soil structure to a certain extent and promote the growth of microorganisms.
At present, water retention agents at home and abroad are roughly divided into two categories: acrylamide- acrylate copolymer, and the other is starch is an acrylate covalent compound.
The main characteristics of domestically produced water retainants are high absorption rate and fast absorption rate, but the conservative performance can only be maintained for 2 years. Afforestation experiments show that its absorption capacity and absorption rate are significantly higher than those of polypropylene products. After absorbing enough water from the soil, it will quickly absorb 130-140 times its own weight after 0.5-1 hour.
But the absorption rate is 60 percent lower in the second year, and sodium polyacrylate can increase the amount of sodium ions in the soil. Therefore, most manufacturers of agricultural water retention agents have switched to the production of potassium polyacrylate or ammonium polyacrylate.