Analysis of the spring and autumn plantings of forest cultures of Pinus sylvestris L. in ribbon-like pine forests of Priirtyshie (by the example of state forest natural reserve "Semei ormany")

The purpose of investigations is the comparative analysis of the survival and growth of forest cultures of Pinussylvestris L. in ribbon-like pine forests of Priirtyshie. The objects of investigations were the forest cultures of Pinussylvetris L. in State Forest Natural Reserve (SFNR) "SemeiOrmany" of East Kazakhstan Region. As experiment in three branches of the natural reserve in autumn period from 2011 to 2013 artificial plantings on the total area 109 ha were created. The cultures were planted in very dry, dry and fresh conditions of habitat with flat (Morozovskiy branch) and hilly (Bukebaevskiy and Kanonerskiy branches) relief. The studies were conducted in autumn 2014 in even-aged forest cultures created in the autumn period of the previous year and in the spring period of the following year of observations. It was revealed that the survival of the autumn plantings was from 44.3 to 80.1% by the years of observations; the survival of the spring plantings was from 41.5 to 73.2%. The study of the height of the forest cultures has showed that in the period from 2011 to 2012 the spring seedlings exceeded the autumn seedlings insignificantly (correspondingly 39.2 and 38.4 cm). The increment in 2014 was the biggest in the plantings of 2011-2012 (14.7-16.3 cm) and the smallest in the plantings of 2012-2013 (7.0 and 6.2 cm). A great difference of the size of increments was observed at the spring planting, especially in 2012. At the autumn planting the increment of the plants was more homogenous. According to the criterion of Shapiro-Wilk the difference between the values of increments by the years of plantings is unreliable (р