According to the growth needs and diseases of each crop, the change of crops can well balance the nutrient content of the soil, inhibit the frequency of diseases, and enable the crop to produce high yields. It can also save fertilizers and pesticides, which is a good way for two-way harvest. 1. Make full use of soil nutrients Because the roots of the same vegetable have the same distribution range and depth, the same nutrients are absorbed, and they are planted for many years in a row. This can easily lead to the lack of certain nutrients due to long-term consumption, and break the soil nutrient balance, causing fertility decline, soil Table salt accumulation. Different types of vegetables require different fertilizers. For example, green vegetables, spinach, and other leafy vegetables require more nitrogen; fruits and vegetables such as tomatoes, peppers, etc. require more phosphate; and potatoes, yam, and other root vegetables require potassium fertilizer. More and more, if they are cultivated in rotation, they can make full use of various nutrients in the soil, reduce the amount of fertilizer, and reduce the pollution of vegetables. 2. Suppression of plant diseases and insect pests The repeated cultivation of similar vegetable crops can easily cause changes in the microbial population in the soil. In particular, the increase in the number of soil-borne pathogens causes a large accumulation and spread of the same pests. Through the rotation of different types of vegetables, we can change the living conditions of pests and diseases to achieve the goal of reducing pests and diseases. For example, grain crop rotation, crop rotation, can control soil-borne diseases; planting onions and garlic vegetables and then planting cabbage can reduce the incidence of soft rot. 3. Significant increase in yield The continuous cropping results in the accumulation of toxic substances that the vegetable roots secrete into the soil that are harmful to their growth. The “autotoxicity†effect is intensified, and the soil enzyme activity changes, the growth of soil beneficial bacteria is inhibited, and the microorganisms that are not conducive to plant growth The increase in the number of microorganisms leads to an imbalance in the microbial flora of the soil and affects the normal growth of the crop. Rational rotation can not only avoid the occurrence of "autotoxicity" and maintain the balance of soil microbial flora. At the same time, rotation of vegetables can also be due to species due to the variety of climate mechanisms, comprehensive consideration, not mistaken for farming, improve planting efficiency. 4. The crop rotation method classifies the same crops of the same type and the same cropping system into one category, and draws a round crop plot, such as cabbage, root vegetables, solanaceous fruit, melons, and beans, all of which are planted in crop rotations according to the year. At the same time should also pay attention to the different rotation period of different vegetables, such as cucumber, eggplant to be separated by 4 to 5 years, tomatoes, pepper, Gan Lan, beans, etc. interval more than 3 years, spinach, leeks, onions and other need to be separated by more than 1 year.
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Nursing pad is a disposable sanitary product made of PE film, non-woven fabric, fluff pulp, polymer and other materials.
Adult nursing pads are mainly used for people who have undergone surgery, those who are paralyzed, and those who cannot take care of themselves. The adult nursing pad is easy to replace, which can ensure that the mattress under the building will not be soiled.
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