Abstract
The article is devoted to the production of seedlings of fruit plants in the North-West of the Russian Federation. A compacted planting scheme is considered when cultivating plants in greenhouses of 50?10?5 m and 50?4?2.5 m of different volumes. In the studies, winter vaccination was used by the method of improved copulation. When planting plants in greenhouses, a single-line (40?15 cm) and three-line (20+20+40?15 cm) planting scheme was used. The influence of the microclimate developing in the protected soil on the parameters of growth and development of seedlings was studied. The assessment of microclimate regulation in film unheated greenhouses of different volumes is given. It is revealed that small-sized greenhouses, due to low buffering and, in connection with this, difficulties with regulating the microclimate, reduce the growth of seedlings in height and give a lower percentage of the output of standard material per unit area. The mechanization of some production processes, where it is possible to use large-sized equipment, for example, soil preparation, delivery of peat or soil, also causes difficulties.
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