As the use of nappy gradually increases, so does the number of discarded products. In order to find ways to turn these wastes into treasures, a series of studies have been carried out. One of them is about the effect of soil water evaporation, and then let's see if the experiment is feasible.

Compare the effect of adding nappy

The soil moisture evaporation curve of adding waste nappy was compared with the blank control, and it was found that adding waste products could reduce water evaporation, and in the same time, the soil evaporation after adding was smaller. Evaporation of soil moisture is a special form of movement of soil moisture. During this phase, moisture in the land becomes gaseous water, which is then transferred to the atmosphere. Therefore, water evaporation is not only related to many factors such as soil structure, texture, water content, color, potential water depth, surface characteristics, transport force, etc., but also to external atmospheric conditions. Water-retaining agents in waste products contain water-absorbing groups. Its irregular network structure has strong water absorption capacity and can absorb water repeatedly. After absorbing water, some crops can be expanded and stored, and slowly released to plant crops for absorption and utilization.

If the excessive evaporative loss of water can be suppressed, especially in arid regions, it is of great significance to improve the efficiency of agricultural water use by inhibiting evaporation and prolonging the slow release time of water in the soil. This significance of nappy plays a pivotal role in agricultural production. Therefore, the amount of waste addition has guiding significance for the trend of water evaporation. The water evaporation rate can reflect the water condition and the balance of water, soil and heat. It is also an important basis for the evaluation of drought tolerance under drought conditions. Therefore, this experiment uses different dosages to determine the most suitable amount of speculation. Water retaining agent can also play a role in retaining fertilizer while retaining water, so it is natural for the water and fertilizer in waste products to be used by plants. It can reduce the total amount of fertilizer, reduce the loss of water and fertilizer, and improve the utilization efficiency of fertilizer.

Research and analysis of nappy water-retaining agents at home and abroad

Domestic and foreign researchers have conducted many studies on water and fertilizer retention, which proves that water-retaining agents can coordinate the coupling environment of water and fertilizer and improve the utilization efficiency of fertilizers. Increase crop yields. The use of nappy in the soil can significantly increase the water holding capacity, with the increase of the concentration, the greater the water holding capacity, the higher the effective water content. Increase the appropriate amount of waste to improve the maximum water holding capacity. The addition of nappy to soil at the same time as fertilizer significantly reduces its water-holding capacity. In general, as fertilizers increase, water holding capacity decreases, so crops use less water naturally. Therefore, finding the right water and fertilizer content is very important. Under constant temperature conditions (40 ℃) evaporation water loss, with the increase of dosage, the stronger the effect of inhibiting water evaporation. The soil samples with the dosage of 1.0% were 3 times that of the control group and 1.2-2.5 times that of the other treatments. Fertilizer nappy can make the water evaporation time longer, can control the water evaporation time smoothly, and is more conducive to the growth of crops.

It can be seen from the experiment that the application of waste nappy to the soil is conducive to giving full play to the value of waste, alleviating the burden on the environment, and at the same time, it can also play a positive role in the soil.