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<p>Black pepper, often referred to as the “King of Spices” or “Black Gold,” is an important spice crop. Commercial plantations are typically established using rooted cuttings from runner shoots. Serpentine layering, a common propagation technique, can yield 50–60 cuttings per plant annually; however, cool weather at higher elevations hampers multiplication, leading to delayed sprouting and lower survival rates. To address this issue, an experiment was conducted at ICAR-Indian Institute of Spices Research in Appangala, Kodagu District, Karnataka, from May 2023 to February 2024. A low cost polytunnel, measuring 200&#xa0;cm in length, 80–100&#xa0;cm in width, and 60&#xa0;cm in height, was constructed within a polyhouse nursery, covered with a 300 gauge white polythene sheet. Single node plantlets with root and leaf were placed inside the polytunnel for 21&#xa0;days and compared with cuttings kept under normal conditions. Results showed a significant difference in sprouting percentage, which ranged from 56.33% (June) to 89.00% (November) in the polytunnel, compared to 40.50% (August) to 76.33% (November) outside. Additionally, vegetative and root parameters including shoot length, number of leaves, root count, and both fresh and dry weights were significantly higher in cuttings within the polytunnel. The earliness in sprouting also led to a higher survival percentage of cuttings in the polytunnel. Thus, using low cost polytunnels in cooler climates can effectively enhance the production of black pepper cuttings.</p>

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Low Cost Polytunnel Technique to Improve the Sprouting and Growth of Black Pepper Rooted Cuttings in Tropical Hilly Zone

  • 期刊论文

  • 发表日期：

    2026年1月19日

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  • H. J. Akshitha,
  • M. S. Shivakumar,
  • K. Kandiannan,
  • S. J. Ankegowda

摘要

Black pepper, often referred to as the “King of Spices” or “Black Gold,” is an important spice crop. Commercial plantations are typically established using rooted cuttings from runner shoots. Serpentine layering, a common propagation technique, can yield 50–60 cuttings per plant annually; however, cool weather at higher elevations hampers multiplication, leading to delayed sprouting and lower survival rates. To address this issue, an experiment was conducted at ICAR-Indian Institute of Spices Research in Appangala, Kodagu District, Karnataka, from May 2023 to February 2024. A low cost polytunnel, measuring 200 cm in length, 80–100 cm in width, and 60 cm in height, was constructed within a polyhouse nursery, covered with a 300 gauge white polythene sheet. Single node plantlets with root and leaf were placed inside the polytunnel for 21 days and compared with cuttings kept under normal conditions. Results showed a significant difference in sprouting percentage, which ranged from 56.33% (June) to 89.00% (November) in the polytunnel, compared to 40.50% (August) to 76.33% (November) outside. Additionally, vegetative and root parameters including shoot length, number of leaves, root count, and both fresh and dry weights were significantly higher in cuttings within the polytunnel. The earliness in sprouting also led to a higher survival percentage of cuttings in the polytunnel. Thus, using low cost polytunnels in cooler climates can effectively enhance the production of black pepper cuttings.