The Practice of Combating Marshantsi (Marchantia polymorpha L.), Which is Changeable in the Cultivation of Scots Pine Seedlings with a Closed Root System, in Relation to Greenhouse Complexes of the Irkutsk Region

Abstract

One of the main tasks defined by the legislation in the field of reforestation is to increase the volume of cultivation of planting material with a closed root system (PMZKS) for use in its silvicultural production. This determines the increased research and production interest in both domestic and foreign experience in growing PMZKS. Technological features of container cultivation of plants in greenhouses are characterized by the presence of some problems that significantly reduce the quality of planting material and the yield of products per unit area. One of them is the problem of the growth of bryophyte plants (including Marchantia polymorpha L.) on the surface of the nutrient substrate. Forest nurseries in the European part of Russia and Siberia have faced this problem in recent years, while in the countries of North America and Europe' development of measures to combat volatile marching has long been relevant in both agriculture and forestry. In this paper, based on the analysis of theoretical and practical data, we considered the factors determining the negative impact of marchant changeable on the growth and development of seedlings of Scots pine. The paper presents the results of a comparative analysis of the effectiveness of various measures to suppress the marching of variable in the closed and open ground of nurseries. Recommendations for growing seedlings of Scots pine with a closed root system, for preventing the appearance and growth of variable marschantia in the conditions of the Irkutsk region on the example of the greenhouse complex of Magistral-Transit LLC have been developed and implemented.