Stockkvaliteten

Stockkvaliteten is a term used in forestry and horticulture to describe the overall condition and suitability of planting stock for reforestation or horticultural planting. It covers the vigor, health, and genetic quality of the plants that are intended for field establishment, including seedlings, rooted cuttings, and container-grown stock.

The concept encompasses several dimensions. Genetic quality refers to the origin, provenances, and breeding value of the stock, which influence growth potential and adaptation to site conditions. Physical quality includes the integrity of the shoot and crown, stem diameter, height, and the condition of the root system. Health and pest-disease status, frost tolerance, and resilience to environmental stress are also important. Uniformity, age, dormancy status, and handling history (such as nursery practices and storage) affect establishment success. Overall, stock quality aims to maximize post-planting survival and early growth while maintaining genetic diversity and site suitability.

Assessment and grading of stock quality typically occur in nurseries and certification programs. Measurements may include height, root length and mass, stem diameter, leaf condition, and signs of damage or disease. Vigor tests, post-plant survival data, and historical performance are used to classify stock into quality categories that guide buyers and planners. Certifications or registrations by national or regional forestry authorities or private schemes help ensure consistency and traceability from propagation to planting.

Stockkvaliteten influences planting outcomes, economic efficiency, and sustainability of forest and horticultural programs. High-quality stock generally yields better establishment rates, sturdier growth, and longer-term site performance, while poor quality can increase risk and costs.