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رکورد قبلیرکورد بعدی
شناسگر رکورد : 616373
سرشناسه : اوستاخ، عصمت، نگارش
زبان اثر : per
کشور محل نشر يا توليد : IR
عنوان و نام پديدآور : بررسی اثر تنش خشکی بر حلقه های رویشی و زوال درختان سوزنی برگ دست کاشت با استفاده از دانش کرونولوژی(مطالعه موردی: درختان کاج بروسیا‭s brutia ten.‬ منطقه صدا و سیما شهرستان خرم آباد) ‭Pinu‬ [پایان‌نامه]
وضعيت نشر و پخش و غيره : دانشگاه لرستان، ‭۱۳۹۲‬
يادداشتهاي مربوط به نشر، بخش و غيره : چاپی
جزئيات پايان نامه و نوع درجه آن : کارشناسی ارشد
زمان اعطا مدرک : ‭1392/11/27‬
يادداشتهاي مربوط به خلاصه يا چکيده : ‭.Trees growing is affected by different internal and external factors. Trees, respond to environmental changes, as climate. This study examined the effect of climatic factors such as temperature (maximum, medium and minimum) and rainfall on the growth rings of Pinus brutia. For this purpose, 31 Pinus brutia trees with the selection method selected and were cut. Then from each tree, 5discs, from the different heights of the tree stem (40 cm, 130 cm and three discs respectively, in 0.3, 0.5 and 0.7 meter) were taken. After preparing disks, annual rings width, using software COREL DRAW X5 and the accuracy of 0.001mm was measured and growth index was created. The correlation results indicate a positive and significant effect of climatic factors, growth index, (probably 95 ), maximum and average temperature in February and minimum temperatures for June , with trees growing in height A (stump height) and also a significant positive correlation (probably 95 ), the maximum temperature in February with trees growing in height B (breast height). And in three other stem heights of pine trees brutia (C, D, and E), there was no significant relationship between temperature and growth. Positive and significant effect of mean monthly rainfall, on trees growing was in height A, of the October (95 probability), in height D November (95 probability), and in height E January (probability 99 ), respectively. The study revealed that trees growing at different altitudes and in different conditions show different reactions to climatic factors‬
مبدا اصلي : IRدانشکده کشاورزی و منابع طبیعی
 
 
 
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