AYHAN USTA, Vildane GERÇEK, EMRE BABUR, Şükran GÖKDEMİR

Assessing Ecological Factors From an Abies grandis Provenance Test Area after Phytophtora Root Rot Attack

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Assessing Ecological Factors From an Abies grandis Provenance Test Area after Phytophtora Root Rot Attack

Due to expansion of world population and increasing variety of human needs, the demand for wood raw material is increasing rapidly. In this case, existing productive forest area as well as production of raw material in a unit area should be enhanced. For this goal, the productive forest area is being increased by planting native species. On the other hand, it is important to use appropriate species such as fast-growing exotic ones that could be adapted to the local conditions in the afforestation activities. Abies grandis has been used for origin experiments in many countries because of the high potential productivity. Many exotic species except for A. grandis had been tested until 1988 in Turkey. In 1988 a total of 24 units, 16 originating from the USA, France and Canada and 8 from our native fir species (4 from A. nordmanniana, 2 from A. bornmuelleriana and 2 from A. equi-trojani), were used, the origins of seeds been provided. Seeds were sown in Meryemana Research nurseries (950 m asl) in the spring season of 1989. 3+0 age seedlings were transferred to Meryemana-Yeniköy research area. All A. grandis seedlings died after 17 years due to Phytophthora root rot infection in the research area. In order to investigate the relation between dead and healthy fir species 24 soil profiles were dug up. Some soil properties such as particle size analysis and exchangeable bases were analyzed. Furthermore, the Phytophthora root rot disease causing the death of A. grandis seedlings was investigated ecologically

Keywords:

Fir species, origin experiments, soil properties Phytophthora root rot,

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