Agroforestry practices in relation to the age and growth rate patterns of Picea smithiana using modern techniques of dendrochronology from Istak valley of Central Karakoram National Park (CKNP) Gilgit-Baltistan, Pakistan. | [Pakistan Journal of Agricultural Sciences • 2018]

Author(s):

1. Alamdar Hussain: Department of Biological Sciences, Karakoram International University,Gilgit,Pakistan

2. Moinuddin Ahmed: Department of Botany, Federal Urdu University of Arts, Science and Technology,Karachi,Pakistan

3. Sher Wali Khan: Department of Biological Sciences, Karakoram International University,Gilgit,Pakistan

4. Haider Abbas: Department of Agriculture and Agribusiness Management, University of Karachi,Karachi,Pakistan

5. Azhar Hussain: Department of Food and Agriculture, Karakoram International University,Gilgit,Pakistan

6. Qamar Abbas: Department of Biological Sciences, Karakoram International University,Gilgit,Pakistan

Abstract:

This study was conducted to describe the age and growth rate structure of Picea smithiana from Istak valley of Central Karakoram National Park Gilgit-Baltistan. Thirty two cores were sampled from 16 trees. The mean age of Picea smithiana trees was 222 years while highest age was recorded 434 years. Growth rate ranged from 5 year/cm to 17 year/cm. Low significant correlation (r =0.54, p<0.01) was observed between dbh and age while regression between age and growth rate among trees was highly significant (r=0.76, p<0.001). Picea smithiana regression between dbh and growth rates and age and growth rates of seedlings were highly significant. However due to wide variance, dbh was not considered as a good predictor of age. Growth rates of seedling in various periods of time indicated that in the old periods seedling growth was very slow which increased with the passage of time.

Page(s): 569-574

DOI: 10.21162/PAKJAS/18.7020

Published: Journal: Pakistan Journal of Agricultural Sciences, Volume: 55, Issue: 3, Year: 2018

Keywords:

population dynamics , growth stipulation , dendrochronology , forest cover

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