The Taihang Mountain area in northern Henan province has poor site conditions, poor soil, and arid climate. The annual precipitation is only 600-700mm. The survival rate of afforestation is low. The selectivity of afforestation tree species is small, and the firewood species selectivity is even smaller. Since 1996, we have selected Wujiao Maple as a fire-fighting forest tree species in the Linzhou area of ​​northern Henan Province to create a Pentagon fire-fighting forest belt and conducted experimental research on the construction techniques, distribution, and settings of the Pentagon fire-fighting forest belt. Practice has proved that the fire-fighting forest belt at Wujiaofeng has a good effect, and it has popularization value in the construction of biological fire-fighting forest belts in the Taihang Mountain area of ​​northern Henan. 1 Characteristics of Pentagonal Maple 1. Biological characteristics Acer mono Maxim, deciduous tree of Aceraceae, up to 20m. Located in the northeast, north, northwest, southwest, central and east China, it grows well in the north of the northern Henan Province. Pentatoma tempreatus is a temperate tree species that has strong adaptability, is more pleasing to the light, grows faster, is drought-resistant, cold-tolerant, and resistant to barrenness, and can grow in both acidic and calcareous soils. However, it grows best on deep, fertile, loose, moist mountainous brown soils. 1.2 fire performance Pentagon Maple is a better fire tree species in northern Taihang Mountains. The ash content was 4.93%, the lignin content was 27.2%, and the calorific value was 19213 J/g. The determination of the water content of the raw material of Pentiana graminis showed that Pentagonal Pentiana has large water content and small oil content and it is not easy to be ignited and burned. In addition, the decomposed litter of Pentatoma quinquefolium is fast, which is conducive to the rapid reduction of the fuel load in the forest and the change of the fire environment. Therefore, the construction of Pentagon fire-fighting forest belt in the Taihang Mountain area of ​​northern Henan is an ideal fire-proof tree species that will prevent forest fire from spreading. 2 Forest belt settings 2.1 Location The forest belts can be set on ridges, mountain backs, saddles, foothills, forest margins, but the main location should be set on the ridge line. The ridgeline is also the best location for creating biological firebreak belts because the ridgelines are likely to form a powerful reversed inspiratory airflow in the direction of reversed airflow and forest fires, and are most effective in preventing forest fires from spreading. 2.2 Density Fire protection forest belts should be connected to cultivated land, mountains, roads, firewalls, fire lines, etc. to divide large areas of forest into several blocks. According to the forest fire risk rating, the fire control forest belt network control area is determined, generally 100-200hm2, and deep mountainous area 200-300hm2. 2.3 Width Set the width of the main belt (east-west direction, perpendicular to the wind direction of the fire-proof period) to 20-30m, and the width of the sub-belt (south-north direction, perpendicular to the main belt direction) is 15-20m. 2.4 Mixing and layering The Pentagonal Maple root system is relatively well-developed. It can maintain water and soil well, and can be mixed with other tree species. It can also improve the site's ecological environment and enhance its fire resistance. According to experiments, Pentagonal maple was mixed with locusts, locusts, and other trees, and its growth performance was good. The comparatively fire-resistant Vitex negundo, Astragalus membranaceus, wild jujube and other undergrowths are arranged on both sides of forest belts and forest belts, which is more conducive to the prevention of surface fire spreading. 3 forest belt construction techniques 3.1 Seed production and seed selection should be selected to grow strong, no pests and fine mother plants. In October, the samara turns from green to yellow-brown, that is, mature and timely picking. The harvested samara was exposed for 3-4 days, and the fruit was winged and rubbed off. After the wind was selected, it was stored in a ventilated room and used for storage. The optimum moisture content of seeds during storage is 8% - 11%. The cotyledons of healthy and good seeds are fresh and yellow-green, such as discolored, dry or smelly, that is, they are deteriorating. 3.2 Nursery Pentagon Maple is generally used for seedling cultivation. The choice of nursery land is that the terrain is gentle, the north wind is sunny, the soil is deep and loose, and the well-drained sandy loam is suitable. In the fall, deep turning is performed. Before the planting, the bed is meticulously prepared for sowing. Each 667 m 2 of land is composted with 1000-2000 kg of soil-fertilizer and 25 kg of phosphate fertilizer. At the same time, 1.5% of dimethoate powder and 90% of crystal trichlorfon are sprayed to eliminate Insect pests in the soil. The climate in northern Henan is more arid and generally lower beds. Sowing in late March to early April. Seeds soaked in warm water for one day or primed with wet sand layer before planting. The seeding amount is 15-20kg per 667 square meters, and if the seed quality or seeding conditions are poor, the seeding amount will be appropriately increased. Cover soil thickness 2-3cm, then cover hay thickness 3-4cm. Seedlings will be removed after 4-5 days. In order to ensure rapid emergence and increase the growth of seedlings, seedlings after emergence and time seedlings and strengthen fertilizer and water management. When the 2-year-old seedlings reach 1.2-1.5m, afforestation can be carried out. 3.3 Construction Technology 3.3.1 Site preparation The soil preparation shall be carried out according to the planning and setting of fire protection belts. Horizontal level, horizontal ditch and fish scale pit preparation are generally used. The Taihang Mountain area in northern Henan is relatively arid and mainly uses the fish scale pit method. After clearing and removing the vegetation, such as weeds, in the set fire-proof forest belts, acupuncture points shall be prepared for cultivation. The size of the fish scale pit is 40cm40cm30cm. Should be carried out before the winter, which is conducive to fire prevention, but also make the soil and soil there is a period of weathering process. 3.3.2 planting density Pentagonal maple more lateral branches, dry shape is poor, planting should not be too thin. The row spacing can be 1m1.5m, 0.75m2m or 1m2m; the planting density of mixed trees is 2m2m or 2m2.5m. 3.3.3 The planting time can be planted in winter and spring. The Taihang Mountain area in northern Henan is relatively arid, while the rainfall from July to September is abundant. It is the best planting time and the survival rate is higher. To ensure survival, two-year-old seedlings should be planted and cut-off measures should be taken. After planting, the stone should be kept pressed and the plastic film provided where possible, and the survival rate can reach more than 95%. 3.4 The management and management of Pentagoneria fortunei along forest belts grows rapidly in young ages. In addition to planting in strict accordance with the construction of technical standards, the fostering management after planting should also be strengthened, and accelerating the closure of canopy into forests so as to give early play to the effectiveness of fire prevention and fire prevention. After the afforestation, it is required to tend for 5 years or more, raise it 1 or 2 times a year, and in case of drought, it should be watered in time. During the tending, 50-100g of nitrogen fertilizer or compound fertilizer is applied to each plant to eradicate the weeds in the fireproof zone, check the seedlings to make up for deficiencies, and loosen the soil to accompany the points to eliminate the root buds and the lower branches of the base stem. 4 Pest control pests The main pests and diseases of Pentagona graminis are brown spot disease and Prunus vulgaris lacquer spot disease, which damages fruits and leaves. Control methods: In the fall, diseased leaves are collected and treated (buried in soil or burned). In the early stage of the disease, Bordeaux fluid can be sprayed 1-2 times, and 65% of Sensen Zinc 0.2%-0.25% can be sprayed on the canopy. Pentagonal maple trees sometimes have locusts, Tianni, etc., but also timely prevention and treatment. China Agricultural Network Editor