Invasive Species Compendium

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Abstract

Root-taking of Crimean pine on hummocky sands in Northern Rostov Oblast.

Abstract

Root-taking in plantations of Crimean pine on hummocky sands is usually low. To find Out the reasons we studied experimental plantations in the dry pine forests. Seedlings of Crimean pine were introduced manually into the mechanically dug trenches. Number of trees in plantations reached 6.6 thousands species per ha. An important factor controlling dieback in the pine plantations was found to be the soil moisture content in the root layer. Precipitation during the active growth directly affected this indicator. The strong correlation was found between root-taking indicators and precipitation (r>0.78). This link supported the fact that success of plantations on the hillocky sands is controlled by moisture content. The precipitation thus is a limiting factor of root-taking of Crimean pine on hillocky sands, especially critical during first half of vegetation period. Plantations of Crimean pine seeded during the years with successful amount of precipitation had higher cultural and protective values.