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前言从1981年开始的10年林木育种计划,到1985年,前5年已经结束。从1986年起,在前5年的基础上,制定了今后的10年(1986—1995年)计划。由于制定前一个计划的当时与现在相比,在林政上的变化,特别是由于林业经济方面的极不景气,带来了造林面积的减少和苗木用量的必然下降。因此,原来的育种计划需要加以修改,但是在计划的本质上并没有大的改动,只是使第一次计划的主旨更加活化起来。
Foreword The 10-year plan for tree breeding starting in 1981 has ended in 1985 and the first five years. Since 1986, on the basis of the first five years, a plan for the next 10 years (1986-1995) has been drawn up. As a result of the present and present of the previous plan, the changes in forestry and administration, especially due to the downturn in the forestry economy, have resulted in the reduction of the area for afforestation and the inevitable decline in the use of seedlings. Therefore, the original breeding program needs to be revised, but there is not any major change in the nature of the program, only the purpose of the first program has been further revitalized.