Soil acidification refers to the phenomenon that the soil ph gradually decreases on the original basis, which is a process in which the hydrogen ions in the soil gradually increase and the exchangeable base gradually decreases. Soil acidification is a common natural process in the process of soil formation and development. It is understood that acidification is common in vegetable soil, especially in greenhouse vegetables. With the increase and accumulation of fertilizer use in greenhouse, Soil acidification is more serious. When investigating the soil of greenhouse vegetables, it is often found that Soil acidification is very serious. The soil ph in most greenhouses is lower than 4.5, and some even lower than 3. In the same greenhouse, it can be clearly seen that the soil ph in the root of plants with good growth is greater than that in the root of plants with poor growth.

Wood ash is a potassium fertilizer and soil loosening agent, which can improve the drought resistance of fruit trees, make their branches and leaves green, enhance photosynthesis, reduce the fall of flowers and fruits, make flowers and fruits colorful, and improve the quality of fruits. At the same time, it is also the bane of fruit tree diseases and pests, which can prevent early defoliation and prevent fruit tree root rot. The method to prevent and control root rot of fruit trees with Wood ash is to loosen the soil beside the root of fruit trees, gently remove the rhizosphere soil, expose the root system, scrape the diseased skin on the root with a knife, air the root for 2-3 hours, sprinkle fresh Wood ash around the diseased root, cover the soil and bury the root. After such treatment, the root rot can be eliminated, and the normal function of fruit trees to absorb water and fertilizer can be restored.

Chinese medicinal herbs such as peony, atractylodes macrocephala, white peony, codonopsis pilosula, platycodon grandiflorum, bupleurum, scutellaria baicalensis, pinellia ternata, ophiopogon japonicus, and lilies can be intercropped between rows of young fruit trees, or intercropped with peanuts, soybeans, mung beans, red beans in summer, and cabbage, carrots, cabbage, garlic, and radishes in autumn and early spring. This not only increases the economic income of the orchard, but also accelerates soil maturation, reduces surface water and fertilizer loss, and promotes fruit tree growth, Realize the combination of land use and land cultivation to achieve the goal of short term growth.

For a long time, the Soil structure has been damaged due to the excessive application of chemical fertilizers, especially the partial application of certain types of chemical fertilizers. In addition, the increase of multiple cropping index, mechanical rolling, human and animal trampling, and unreasonable farming have made the soil more hardened, the permeability of the soil worse, the coordination of water, fertilizer, air, and heat is difficult, the root system of fruit trees is underdeveloped, the utilization rate of fertilizer is reduced, soil borne diseases are serious, and the ability to maintain water and resist drought is reduced, Poor growth and low yield of fruit trees result in high investment and low returns for fruit farmers. Applying bio bacterial fertilizer manufacturers' fertilizers can improve the soil environment of orchards.