China's afforestation technology has been developed by leaps and bounds in recent years, how to strengthen the progress of Korean pine afforestation technology, and carry out effective pest control work has not only received widespread attention from the society, but also an important means to develop China's green economy. In the process of carrying out the afforestation of Korean pine, the relevant departments must attach great importance to the seedling technology, based on the development status of The afforestation of Korean pine in China, combined with the modern development level, so as to provide an effective guarantee for the growth quality of Korean pine. This article will describe in detail the afforestation technology and pest control work of Korean pine in two aspects.
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1.1 Afforestation land selection. Because the physique of Korean pine is more special, the requirements for soil are higher, not only to ensure the softness of the soil, but also to choose a better drainage and breathable soil. Therefore, when choosing the growth site of Korean pine, it is not only necessary to ensure its drainage function, but also to choose a mountain with a gentle slope. It is important to note that if the Korean pine is on a dry slope or in a poorly drained soil, it will cause serious negative consequences, and the soil that is too acidic and too alkaline is not suitable for the cultivation of the korean pine.
1.2 Afforestation density. When analyzing the afforestation density of Korean pine planting, it is not only necessary to effectively analyze the soil thickness, but also to conduct a comprehensive study of the use of Korean pine, and try to select the soil with thinner soil and higher dryness, so as to ensure the effective planting of Korean pine and achieve the ultimate goal of protecting the forest. On the other hand, if the diameter of the wood is large, it will be necessary to select the soil fertile soil for dense planting, so as to ensure economic benefits.
1.3 Tree species configuration. As an effective way to reduce pests and diseases and protect the soil, the mixed forest of Korean pine plays a vital role in it, selecting moist soil for korean pine planting, using the method of mixed ash willow, selecting locations such as half-yang slope, carrying out effective planting work, and promoting the comprehensive development of mixed planting.
1.4 Afforestation and land preparation. When carrying out the work of land preparation, it is not only necessary to ensure that it is treated one year in advance, but it is best to choose in the autumn, not only to ensure that the weeds and shrubs determine the bandwidth according to the strip requirements, the guarantee period is within the range of 50-70cm, but also to ensure the fertility of the soil, to carry out comprehensive cleaning of excess weeds, to ensure that the soft and water-retaining soil can lay the foundation for the planting effect.
1.5 Select seedlings. In the process of carrying out the planting of Korean pine, it is necessary to control and analyze its seedlings in all aspects, not only to ensure the good of its root system, but also to strictly control the stem, to ensure that it remains within the range of 0.5cm, the seedling age should exceed four years, the root should be maintained within the range of 18cm, and the seedlings with more than 5cra side roots and full shoots should be selected to ensure their planting effect.
1.6 Afforestation. In the process of carrying out the afforestation of Korean pine, try to choose the summer and use the method of planting seedlings to carry out effective afforestation work. Not only to ensure the separation of the planting seedling hole topsoil and heart soil, but also to put the root system of the baswood into the seedling cavity, fill it with topsoil, and when it is filled to more than half, the seedlings should be gently lifted to avoid the negative impact of nest roots and planting too deeply, and finally the surface of the leaves and floating soil is pressed to cover its surface to prevent the evaporation of water from adversely affecting the korean pine.
1.7 Young forest care. Young forest care not only includes weeding and irrigation work, but also has a crucial impact on the correction and compaction of Korean pine, using strips or blocks to irrigate Korean pine seedlings. In the process of carrying out nursing, it is not only necessary to ensure that the nursery bandwidth is maintained within the range of 50cm, but also to attach great importance to the time and frequency of care, based on the actual situation of the growth of Korean pine, according to the density of weeds, it is effectively analyzed. Under normal circumstances, the nursery time is maintained at 3-7 years, and when raising Korean pine saplings for the first time, it is necessary to combine the actual situation of cutting and irrigation to straighten and compact korean pine seedlings.
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2.1 Standing blight. An important means of preventing and controlling blight is to carry out all-round disinfection of the soil, use pentachloronitrobenzene and dixone to mix, ensure its 3:1 ratio, and add a certain amount of fine soil to shake the mixed solution. Before proceeding with the sowing work, the mixed reagents are evenly sprinkled in the sown furrows. After the excavation of the shrub for drug prevention and control, it is necessary to carry out daily disinfection work, use 1% of the aqueous solution of ferrous sulfate to spray every day, rinse the seedlings in time, and then use the dixon spray to disinfect it for the second time, so as to ensure the effectiveness of soil disinfection and make the planting effect of korean pine reach the ideal goal.
2.2 Loose needles. Pine needles are mainly manifested in the initial yellow spots, over time, the yellow spots gradually deepen to appear light brown, resulting in the full leaf yellowish shedding. For pine needles, the main prevention and control method is to create a mixed forest of needle or broad-leaved tree species, so as to ensure the fertility of the soil and block the adverse effects of bacterial infection on korean pine.
2.3 Pine bark elephant. As the most likely pest in the cultivation process of Korean pine, the pine bark elephant, also known as the pine elephant nose worm, will have a serious negative impact on the bark and phloem of the Korean pine. In view of this phenomenon, it can be used to raise nurseries to scientifically fertilize them to ensure the larvae caused by the fallen leaves on the ground in the forest area in autumn and winter, and the afforestation workers should cut the branches that are seriously damaged in time, and peel and burn them.
2.4 Neosophora bee. New pine leaf bee will cause a serious negative impact on korean pine, seriously threaten the quality of leaf ribs, in view of this phenomenon, the relevant departments in the development of new pine leaf bee prevention and control work, must use advanced science and technology and modern equipment, effective prevention and control, to ensure the overall development of red pine forestry. In the larval stage, it can be effectively treated by spraying pesticides to avoid the adverse effects caused by the large number of insect feathers. Finally, it should be noted that the method of targeting the collectivity of larvae can be effectively treated by manual capture.
2.5 Pine caterpillars. In view of the pest threat of pine caterpillars, it is necessary to conduct special investigation and research work, conduct insect situation monitoring and reporting in areas where pine caterpillars often occur, and effectively control pine caterpillars by pruning branches and closing mountains and forests, so as to avoid the negative impact of pine caterpillars on red pine branches. Forest planting programmes not only ensure the afforestation of red pine forests, but also contribute to the production of korean pine to a large extent, and at the same time, help regulate the ecological balance and use nature to fight insect pests.
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China should attach great importance to the afforestation technology of Korean pine, use modern afforestation technology to comprehensively reform it, ensure the idealized effect of afforestation land, afforestation density, young forest care and tree species allocation, so as to strictly control insect pests such as pine caterpillars, standing blight, pine bark elephants, new pine leaf bees and pine needles, and promote the development of Red Pine forestry in China.