With the continuous development of the social economy, the corn planting industry has shown a large-scale development momentum. While raising the economic income of farmers, it has put forward new requirements for corn seed technology and pest control technology. Due to the limitations of corn cultivation techniques and the adverse effects of corn pests and diseases, the quality and yield of maize have yet to be further improved. Therefore, continuous optimization of new corn cultivation techniques and corn pest control measures is of great practical significance for promoting the development of corn planting. 1 New corn cultivation technology 1.1 Scientific selection The scientific choice of corn varieties is the key to increasing corn production. According to the climate and soil characteristics of the corn growing area, selecting high quality corn varieties can effectively increase the yield and quality of corn. In the process of selecting seeds, attention should be paid to the factory address of the corn seeds and the manufacturer to carefully check the producers with higher seed germination rate and yield rate; the seed production date and seed quality should be carefully observed to avoid damage. More seeds; before planting corn, it is necessary to strengthen the inspection of the seeds, use the fungicide to sterilize the seeds, and increase the germination rate of the seeds. For example, farmers in the south of the Huaihe River in Anhui Province have selected the Longping 206 corn variety that is resistant to waterlogging in response to the characteristics of summer flooding in the region, which effectively improved the lodging resistance of corn and achieved the goal of increasing corn yield. 1.2 Reasonable close planting In order to increase the yield of corn, it is necessary not only to scientifically select seeds, but also to rationally close plants. Reasonable close planting can reduce the adverse effects of too small inter-foliar spacing on corn growth, ensuring that each leaf can absorb enough sunlight, enhance leaf photosynthesis, and provide sufficient light for corn growth. At the same time, appropriately increasing the spacing of corn planting can also avoid the growth of other corn plants affected by leaf damage of a corn plant, increase the permeability of the corn growth environment, and form a good basis for improving corn yield and quality. 1.3 Balanced fertilization Soil fertility is the nutritional support for corn growth. In the process of fertilizing corn, the organic combination of organic fertilizer and inorganic fertilizer should be achieved, and the organic combination of base fertilizer and top dressing should be combined. For example, in the process of fertilizing corn, a farmer in Anhui calculates the amount of fertilizer needed according to the yield of corn, and adjusts it according to the soil fertility condition. According to the target of corn yield of 500-600kg/667m2, according to the situation of medium soil fertility in this area. For each 667m2 corn field, apply 15kg of nitrogen fertilizer, 5kg of phosphate fertilizer, kg of potassium fertilizer, 30~35kg of urea, 40kg of calcium phosphate, 15kg of potassium chloride, and 30kg/667m2 of nitrogen fertilizer for corn field based on straw returning. After the corn is harvested, the output is increased to 700kg/667m2, which effectively increases the economic income of the farmer. 2 Pest control measures for corn 2.1 Agricultural control It is necessary to do a good job in the field, and incinerate and pulverize the remaining corn stover to prevent the adverse effects of bacterial residues on the growth of the next year; deepen the land before planting to reduce the pests and diseases in the deep soil. The survival probability of bacteria, cut off the propagation conditions of corn pests and diseases; timely remove the weeds in the field, increase the permeability of the corn field, and achieve the damage to the growth conditions of the corn aphids; the rotation system should be implemented to reduce the damage of the pests to the corn , is conducive to increasing corn production. For example, in the process of planting crops, a farmer in Anhui adopted a 1a1 planting method, planting corn in the first year, crushing the straw after receiving the goods, and planting peanuts in the second year. In this way, the soil fertility is effectively increased. At the same time, it also reduces the adverse effects of pests and diseases on corn quality and yield, which is worthy of extensive reference and promotion. 2.2 Frequency vibration insecticidal lamp prevention Frequency-vibration insecticidal lamps are an effective way to combat corn pests and diseases. In the process of applying the frequency-vibration insecticidal lamp for insecticide, the spacing of the insecticidal lamp should be reasonably set. For corn fields with relatively flat terrain, one insecticidal lamp should be set every 200m. For cornfields with low terrain, the distance of the frequency-vibration insecticidal lamp should be shortened to 150m. At the same time, in the process of applying the frequency-vibration insecticidal lamp to prevent corn pests and diseases, attention should be paid to avoid the insect-killing blind zone. The height of the frequency-vibration insecticidal lamp is set to 1.5m, and the tripod is used for fixing, reducing the frequency-vibration killing. Insect lamps are adversely affected by insecticidal effects due to the combined effects of external factors such as wind. In addition, after the installation of the insecticidal lamp, the type and quantity of pests and diseases of a certain insecticidal lamp should be recorded for one month. Through in-depth analysis of the recorded results, the types of pests and diseases that are most harmful to corn planting should be determined and targeted. Sexual control measures. 2.3 sexual attractant trapping prevention A lure that is reasonably selective for attractants. Choose a lure with a long duration and high sensitivity to improve the insecticidal effect, and often replace the lure to ensure the insecticidal efficiency of the lure; the separation between the trap and the lure should be achieved to reduce the mutual interference between the two. To improve the efficiency of trapping pests and diseases; it is reasonable to set the time for sex attractants to be trapped. Try to trap the corn borer at the birth stage, because the resistance of the corn aphid is not high during this period, and the prevention and control of the corn borer at the source can be achieved. 3 Conclusion In the process of planting corn, corn production can be effectively improved by optimizing corn planting techniques, scientific selection and sowing, rational close planting and fertilization. On this basis, the prevention and control of corn pests and diseases, the use of frequency-vibration insecticidal lamps and sexual attractants for trapping and killing, combined with agricultural control methods, is conducive to reducing the adverse effects of pests and diseases on corn yield and quality. Therefore, the above method can be applied in the process of planting corn.
Description:NY300 Asbestos Jointing Sheet for Oil-Resistance is made by long asbestos fiber in high quality and oil resistant synthetic rubber as the main materials.
Usage:Suitable for the mediums of temperature under 300℃ and pressure under 3.0Mpa kerosene,mineral oil,plant oil,hot chemical solvent oil,etc transmitted in the joints of facilities and pipelines.
TEMP:300℃(max)
PRESS:3.0MPa(max)
Dimension:1540x1360mm(recommend)
4100×1500mm; 4500 x 1500mm;2000×1500mm;
1500×1500mm;1500×1000mm;1270×1300mm; 3810×1300mm
Thickness: 0.5~6.0mm
Technical data:
Lateral Tensile Strength MPa ≧12.7
Compressibility % 7~17
Recovery% ≧50
Density g/cm³ 1.6~2.0
Normal temperature softness No cracking
Oil Resistivity Test:
Immersion IRM903 Oil keeping 5h (149℃)
Lateral Tensile Strength(MPa) ≥ 9.0
Weigh gain rate(%) ≤30
Immersion ASTM Fuel Oil B keeping 5h(21-30℃)
thickening rate (%) 0~20
Oil sealing properties under normal Temperature
Medium:RH-75 Avgas
Pressure: 15Mpa No leaking keeping 30 minutes
Nitrogen Leakage Rate ML/(h•mm)≦300
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NY300 Asbestos Jointing Sheet for Oil-Resistance
Analysis of new corn cultivation techniques and pest control measures