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<p>Perennial horticulture systems have vast potential for climate change mitigation. The study was undertaken to determine the carbon sequestration potential of apple orchards and to develop allometric equations for biomass and carbon estimation. Six apple orchards of three different age groups, i.e. less than 15&#xa0;years, 15–30&#xa0;years and more than 30&#xa0;years, were selected at northern and southern aspects in Shimla district of Himachal Pradesh. Carbon dioxide (CO<sub>2</sub>) sequestration potential was determined by estimating tree biomass using a&#xa0;semi-destructive method. Data collected from 72&#xa0;representative trees of different age classes were used to develop allometric equations by taking diameter and height as independent variables and biomass and carbon as the dependent variables. Maximum biomass and carbon were observed in the northern aspect in the more than 30&#xa0;years age group with the respective values 68.36 t&#xa0;ha<sup>−1</sup> and 32.83 t&#xa0;ha<sup>−1</sup>. The biomass and carbon stored in stem, branches, leaves and roots were observed to increase with age and were higher in the northern aspect than in the southern aspect, and found to be higher in orchards aged over 30&#xa0;years. CO<sub>2</sub> sequestration potential was observed to be higher for orchards in the northern aspect (152.60 t&#xa0;ha<sup>−1</sup>) than in the southern (127.36 t&#xa0;ha<sup>−1</sup>). The potential to sequester CO<sub>2</sub> increased with increasing age, with mean values ranging from 83.13 to 185.85 t&#xa0;ha<sup>−1</sup>. The allometric equations prepared are applicable to the wet temperate zone of Himachal Pradesh. Among the equations prepared, the monomolecular (adjusted coefficient of determination [adj R<sup>2</sup>] = 0.95) and Gompertz (adj R<sup>2</sup> = 0.90) were the best fitted models for biomass and carbon estimation based on diameter and height, respectively. Quadratic equations were best fitted for the estimation of carbon based on height (adj R<sup>2</sup> = 0.96) and diameter (adj R<sup>2</sup> = 0.96), respectively. The equations prepared will play an important role in estimating the biomass and carbon stocks of apple orchards for the calculation of carbon credits.</p>

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Carbon Stock Distribution and Allometric Models for Apple Orchards in the Wet Temperate Zone of Himachal Pradesh

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • Tanvi Sharma,
  • Mohinder Kumar Brahmi,
  • Pratima Vaidya,
  • Satish Kumar Bhardwaj,
  • Pramod Verma,
  • Varnika Sharma

摘要

Perennial horticulture systems have vast potential for climate change mitigation. The study was undertaken to determine the carbon sequestration potential of apple orchards and to develop allometric equations for biomass and carbon estimation. Six apple orchards of three different age groups, i.e. less than 15 years, 15–30 years and more than 30 years, were selected at northern and southern aspects in Shimla district of Himachal Pradesh. Carbon dioxide (CO2) sequestration potential was determined by estimating tree biomass using a semi-destructive method. Data collected from 72 representative trees of different age classes were used to develop allometric equations by taking diameter and height as independent variables and biomass and carbon as the dependent variables. Maximum biomass and carbon were observed in the northern aspect in the more than 30 years age group with the respective values 68.36 t ha−1 and 32.83 t ha−1. The biomass and carbon stored in stem, branches, leaves and roots were observed to increase with age and were higher in the northern aspect than in the southern aspect, and found to be higher in orchards aged over 30 years. CO2 sequestration potential was observed to be higher for orchards in the northern aspect (152.60 t ha−1) than in the southern (127.36 t ha−1). The potential to sequester CO2 increased with increasing age, with mean values ranging from 83.13 to 185.85 t ha−1. The allometric equations prepared are applicable to the wet temperate zone of Himachal Pradesh. Among the equations prepared, the monomolecular (adjusted coefficient of determination [adj R2] = 0.95) and Gompertz (adj R2 = 0.90) were the best fitted models for biomass and carbon estimation based on diameter and height, respectively. Quadratic equations were best fitted for the estimation of carbon based on height (adj R2 = 0.96) and diameter (adj R2 = 0.96), respectively. The equations prepared will play an important role in estimating the biomass and carbon stocks of apple orchards for the calculation of carbon credits.