Pak. J. Bot., 47(4): 1317-1324, 2015.

EARLY FIELD PERFORMANCE OF DROUGHT-STRESSED SCOTS PINE (PİNUS SYLVESTRİS L.) SEEDLINGS

SEMSETTİN KULAC^1*, IBRAHIM TURNA², EMRAH ÇİÇEK¹, AYKUT SAĞLAM²AND ÜMİT TAŞDEMİR¹

Abstract: Scots pine (Pinus sylvestris) has a large natural distribution throughout the world, including semi-arid areas of Turkey, where it is being used for afforestation. Determining the drought resistance of Scots pine provenances can increase the success of afforestation efforts in semi-arid regions. In the first stage of this study, water-stress treatments were applied to ten provenances of one-year-old Scots pine seedlings in their second vegetation period (between April and November). The diameter and height of the seedlings were evaluated in the nursery in order to determine their morphology. The four drought-stress treatments consisted of once-weekly irrigation (IR1), twice-weekly irrigation (IR2-Control), biweekly irrigation (IR3) and open field conditions (IR4). Later, the water-stressed seedlings were planted in a semi-arid district in Bayburt, Turkey, and their survival and growth performances were evaluated over a five-year period. The nursery study showed that drought stress and provenance as well as the interaction of the two significantly affected the morphological characteristics of the seedlings. Under water-stress conditions, the best growth performance was found in the Dokurcun, Degirmendere and Dirgine provenance seedlings. Water-stress and provenance factors and their interaction also affected the open field performance of the seedlings, where the Degirmendere, Dirgine and Dokurcun provenances again exhibited the best performance. Consequently, these Scots pine provenances can be recommended for afforestation sites having conditions similar to those of the study site.

Key words: Provenance, Survival, Morphology, Afforestation.

S1: survival percent at the end of the first growing season (six months after planting)

¹Faculty of Forestry, Department of Silviculture, Duzce University, 81620 Duzce, Turkey

²Faculty of Forestry, Department of Silviculture, Karadeniz Technical University, 61080 Trabzon, Turkey

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			Updated: 18-08-15
	*EARLY FIELD PERFORMANCE OF DROUGHT-STRESSED SCOTS PINE (PİNUS SYLVESTRİS* L.) SEEDLINGS** SEMSETTİN KULAC^1, IBRAHIM TURNA², EMRAH ÇİÇEK¹, AYKUT SAĞLAM²AND ÜMİT TAŞDEMİR¹ Abstract:* Scots pine (Pinus sylvestris) has a large natural distribution throughout the world, including semi-arid areas of Turkey, where it is being used for afforestation. Determining the drought resistance of Scots pine provenances can increase the success of afforestation efforts in semi-arid regions. In the first stage of this study, water-stress treatments were applied to ten provenances of one-year-old Scots pine seedlings in their second vegetation period (between April and November). The diameter and height of the seedlings were evaluated in the nursery in order to determine their morphology. The four drought-stress treatments consisted of once-weekly irrigation (IR1), twice-weekly irrigation (IR2-Control), biweekly irrigation (IR3) and open field conditions (IR4). Later, the water-stressed seedlings were planted in a semi-arid district in Bayburt, Turkey, and their survival and growth performances were evaluated over a five-year period. The nursery study showed that drought stress and provenance as well as the interaction of the two significantly affected the morphological characteristics of the seedlings. Under water-stress conditions, the best growth performance was found in the Dokurcun, Degirmendere and Dirgine provenance seedlings. Water-stress and provenance factors and their interaction also affected the open field performance of the seedlings, where the Degirmendere, Dirgine and Dokurcun provenances again exhibited the best performance. Consequently, these Scots pine provenances can be recommended for afforestation sites having conditions similar to those of the study site. Key words: Provenance, Survival, Morphology, Afforestation. Abbreviations IR1: irrigation once a week IR2: irrigation twice a week (control) IR3: irrigation biweekly IR4: open field RCD: root-collar SH: seedling height S1: survival percent at the end of the first growing season (six months after planting) S2: survival percent one year after planting, S3: survival percent five years after planting DI: diameter increment HI: height increment ¹Faculty of Forestry, Department of Silviculture, Duzce University, 81620 Duzce, Turkey ²Faculty of Forestry, Department of Silviculture, Karadeniz Technical University, 61080 Trabzon, Turkey Corresponding author’s e-mail: semsettinkulac@duzce.edu.tr; Ph: 03805421137 Fax: 03805421136

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