Growth and ameliorative role of protective plantation in conditions of forest-steppe zone

Abstract

Abstract The systems of protective plantations transform agro-territories of the forest-steppe of the European part of Russia. With an area of artificial linear plantings in the Central Black soil region of 600000 ha, negative natural phenomena and erosion processes in landscapes were significantly reduced. In windbreaks with fast-growing tree species, the highest growth rates are observed with a row spacing of 3.0 m and a tree spacing of 1.0 m. A convex transverse profile is formed in middle-aged stands, where the height of the middle rows is higher by 12.1 - 17.2% than in the extreme. The average tree growth continues up to 30 years. The growth rate is 0.73 - 0.83 m/year with the decrease from the age of 15-24 years. In the system of forest belts during the growing season, there is an increase in relative humidity of 1.8 - 9.8%, which altogether leads to an increase in the yield of grain crops by 330 - 550 kg/ha. The formation of plantings on the arable land of optimal parameters and structures will make it possible to have biological structures of long-term use with an increasing reclamation effect.