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编辑同志: 林木种子有其特殊性,产量不稳定,有大小年之分,丰年歉年之别,采种对造林的规模、速度、计划等均有一定程度的制约。大年的种子品质好,采种成本低。因此,大、小年不仅是数量的多寡,而且还有质量的优劣,成本的高低等问题。为了调剂大小年的余缺,确保种子质量,提高经济效益,必须在大年多采种,以丰补歉。我省飞播及群众用种造林的主要乡土树种是云南松和思茅松,而云南松和思芽松的丰歉比较明显,一般来说,丰年的结实量是歉年的3倍,丰歉年的结实周期一般为2—3年。根据云南松和思芽松的结实规律,今年(1988年)又逢结实大年,建议有关部门应即时做好采种、
Editor comrades: Forest seeds have their own particularities, the output is unstable, with the size of the year, the harvest year difference, the planting of the size, speed, plan, etc. have a certain degree of constraints. New Year’s seeds of good quality, low cost of planting. Therefore, the large and small annuals are not only the quantity, but also the problems of the pros and cons of quality and the level of costs. In order to adjust the size of the remaining years, to ensure the quality of seeds, improve economic efficiency, must be in the New Year more kinds of seeds, to Feng apology. The main native species of the province for aerial sowing and mass afforestation are Pinus yunnanensis and Simao pine, while the abundance and abundance of Pinus yunnanensis and Sprouting pine are more obvious. The solid period is generally 2-3 years. According to the strong rules of Pinus yunnanensis and Sprouting Pine, this year (1988) is another new year. It is suggested that relevant departments should promptly carry out seed collection,