I. Analysis of drought-resistant and water-retaining cultivation techniques 1.1 Improve soil structure and improve soil water holding capacity In the economic forest planting work, the drought-resistant and water-retaining planting technology has been widely used. In the application of this technology, the main development direction is to improve the basic structure of the soil. Studies have shown that in arid areas with poor soil and water conditions, scientific fertilization has a very important role in improving soil structure. Organic fertilizer can effectively improve the internal structure of the soil, change the composition of nutrients in the soil, and ensure the healthy growth of economic forests. If the chemical composition and nutrients in the soil are in equilibrium, the soil's ability to resist drought can be significantly improved. 1.2 Change surface evaporation conditions to slow soil evaporation Changing the surface evaporation conditions can maintain the moisture in the soil and also slow the evaporation of water in the soil. In general, the technology is mainly divided into three modes of operation: film covering, straw covering, and intercropping. Film covering technology is widely used in spring. Every year from February to March, most economic forest areas are windy and dry. When film is covered under the roots, it can reduce the evaporation of water. The surrounding environment where the trees are located plays a certain role in regulation. This method enhances the activity of microorganisms in the soil and promotes the degradation of microorganisms in the soil. The application of straw mulching technology requires a certain carrier as a guarantee. Generally, weeds and leaves are selected as important carriers of technology, covering it near the roots and the surface of the earth, so that the contact between the roots of the trees and the air is greatly reduced. Thereby playing a role in controlling the evaporation of water. Deep cover and watering treatment should be carried out before covering, then the platycodon should be covered, and the appropriate amount of pesticide should be sprayed according to the requirements of forest growth to achieve the purpose of insecticide. Intercropping is to apply other crops around young trees. It can improve the utilization efficiency of land resources during the growth and maturity of trees, and then use grain as an effective premise for water supply to improve the soil and water conditions of trees. Second, the application principle of drought-resistant and water-retaining cultivation techniques When applying drought-resistant technology, on the one hand, we must fully understand the applicability of the technology, and also select varieties with strong drought tolerance. Although drought-resistant forests have very good drought resistance, they are also affected by the surrounding environment. Each economic forest has different types of varieties, and there are also large differences in different types of drought resistance. Therefore, when planting economic forests, we must pay attention to the investigation of the environment, select the best varieties by combining multiple factors, and select different tree species according to different climatic conditions. Third, the application of drought-resistant and water-saving cultivation techniques 3.1 attach importance to soil cultivation In the application of drought-resistant and water-retaining cultivation techniques, in order to better ensure the quality of planting, effective measures are needed to treat the soil. Measures should be taken to increase the adaptability of the trees during planting so that the water can be fully utilized. Therefore, in the economic forest planting, it is necessary to do a good job in land preparation. Commonly used land preparation modes include fish scale pit preparation, horizontal level preparation and horizontal groove preparation. (1) Fish scale pit land preparation usually refers to the vertical design of the local hillside or water source, and then the economic forest planting. This method has a good application effect in arid and semi-arid areas. (2) The horizontal terrace preparation is generally applied to economic forest planting areas with relatively flat terrain and thick soil layers. This method can intercept surface runoff and therefore has a very good control effect on soil erosion. (3) The main role of horizontal trench land preparation is to intercept precipitation. This method can improve soil permeability, improve soil water retention capacity, and control water evaporation in soil. This method is generally applied in economic forests to resist intermittent drought. 3.2 Joint efforts to carry out aggregate cultivation According to the actual situation of economic forests, scientific deep cultivation can effectively improve the drought resistance of economic forests. Adopting a clustered forest planting model can effectively resist the intrusion of sand and sand, and at the same time, increase the survival rate of forest trees. This method can also reduce the cost input in the irrigation process and improve economic benefits. For economic forests with better growth conditions, under dry natural conditions, pruning can be used to control the effects of transpiration, which is also an important means of water retention. If the water loss in the trees is effectively controlled, the photosynthesis of the plants will also increase, so the water absorption of the trees will be more sufficient, ensuring the water supply of the roots of the trees. 3.3 using dense planting methods In many arid economic forest growing areas, there is very little rainfall in the area, which has become a key factor affecting the growth of economic forests. The use of reasonable close planting technology can improve the nutrient supply of forest trees. In terms of density, the local specific characteristics should be fully taken into account, and the local soil, climate and tree's own drought resistance capacity should be used as the basis to improve the quality of economic forest management and maintenance. A very important process. The application of this method can improve the land utilization rate, enrich the nutrients in the soil, and provide high quality conditions for improving economic forest production. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Urology Instruments,Urology Cystoscope Set,Surgical Instrument Urology,Urology Rigid Endoscope Nephroscope ZHEJIANG SHENDASIAO MEDICAL INSTRUMENT CO.,LTD. , https://www.shendasiaomed.com