Technology of growing seedlings of Quercus robur and Juglans nigra in arid conditions

The purpose of the research is to develop technologies for growing black walnut and black oak in the arid conditions of the Volgograd region on light chestnut soils and to study the effect of various types of substrates on their biometric indicators. The article provides information on the technology of growing seedlings of woody species in a nursery in arid conditions of the Volgograd region (Kamyshin): pedunculate oak (Quercus robur L.) and black walnut (Juglans nigra L.). It was revealed that the percentage of non-vegetated lands in the region has increased by 3.4% over the past 20 years, and the amount of forest area has decreased by 0.3%, these data suggest the need to replenish the assortment and number of tree species in various types of plantations. It has been established that artificial regulation of the main environmental factors in the greenhouse makes it possible to accelerate the cultivation of planting material in nurseries. Fluctuations in the growth of oak and walnut seedlings depend on the humidity level and the period of phenophase. Timely pruning of the roots ensures the best growth and development of seedlings. It was revealed that the use of a peat and sand in a ratio of 3:1 using the planting line Mosa green is the best option for growing walnut and oak seedlings. It has been established that from 1 hectare of the school nursery department, petiolate oak and black walnut have an output of 17,000 thousand units at a 3-year growing period with a planting density of 22,000 pcs/ha, and 14,500 thousand units with a planting density of 20,000 pcs/ha at 4 years, and the quality indicators of seedlings fully comply with the standards of planting material tree and shrub species. Proper design of plantings allows for a high yield of seedlings in the school nursery department, and the watering regime can be determined by the biological characteristics of the species. The use of tools and equipment allows you to reduce the cost of manual labor and increase productivity and the number of rotations in the nursery.

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