科学设计原木期货交割质量标准

Core Viewpoint - The Dalian Commodity Exchange (DCE) has developed a quality index system for the delivery of log futures, incorporating standards from major log-consuming provinces and focusing on various indicators such as tree species, length, diameter, appearance defects, and shape [1][2][3] Group 1: Tree Species and Pricing - The log futures allow all species of coniferous logs for delivery, with radiata pine selected as the standard species due to its high trade volume and standardization [1] - Spruce and fir are chosen as premium substitute species, with a premium set at 100 yuan/m³ based on historical price differences [1] - For major imported species like eastern white pine and domestic species like masson pine, pricing is referenced to radiata pine, with a zero premium or discount [1] Group 2: Diameter and Length Specifications - The standard diameter for logs is set at an average of 36 cm to 46 cm, with specific requirements for individual logs [2] - The standard length for logs is set at 3.9 meters, with individual logs required to be between 3.85 meters and 5.8 meters to meet processing needs [2] Group 3: Appearance and Shape Standards - Five key appearance defect indicators are identified, including knots and decay, with specific thresholds set for standard and substitute logs [3] - Logs must generally be cylindrical, straight, and smooth, without severe deformities, to meet downstream processing requirements [3]