| Abstract: | Studies were carried out in 32 temporal sample plots in larch stands of Kaunas Lagoon protective plantations of Dubrava Experimental and Training Forest Enterprise. 4 species of larches were identified: European, Polish, Russian, Siberian larch. Polish larch is characterized by best growth in 55 years of age, in habitat Nc. Its average diameter is 40,6 cm, height – 30,5 m., while diameter of Russian larch is 26,4, its height is 23,7 m, diameter of Siberian larch is 22,5 cm, height – 22,7 m. Volume of larch forests, when level of stocking is 0,7–0,8, is the following: Polish 420 m3/ha, European 380m3/ha, Russian 320 m3/ha, and Siberian 320 m3/ha. The best drop of branches is of Polish larch, and worst – of Russian larch. The straightest (straight and very straight) are European (38,3 %) and Russian larch (33,1 %) stands. The lowest average defoliation is in Polish (7,6 %), and the highest is in Russian (16,9 %) larch stands. While speaking about fructification of larches in 2013, it should be noted that Polish larch was characterized by best, and Russian larch – by worst fructification. A large part of larch stands is of very good and good sanitary condition, while 10 – 15 % is of satisfactory and poor condition. European and Polish larch stands are of best sanitary condition, while Siberian ones – of worst sanitary condition. It is recommended growing only Polish and European larches |
