中国银杏种植业良种化进程的思路

The Progress of Improved Variety System for the Planting Industry of Ginkgo biloba L. in China

阐述良种化的概念和意义；根据我国银杏生产发展的现状，提出中国银杏种植业现阶段良种化的进程是：加快产区良种选育和新发展区良种引种试验，加快良种苗木繁殖体系建设，用良种接穗改造低产劣种株，同时稳步发展良种苗种植；认为银杏在现阶段只宜采用科学的选择育种方式。

The concept and significance of the improved variety system were expounded. According to the current situation of the development of Ginkgo biloba L. in China, the progress of improved variety system for the planting industry of Ginkgo biloba L. in China in the present period is to accelerate the selection and breeding of improved varieties in the old productive areas and the introducing experiments of improved variety in the new productive areas, to erfect the reproduction system of improved variety seedlings, to improve the low output plants by grafting with the buds from improved varieties and to develop steadily the plantation of improved variety seedlings. The paper also points out that the selection and breeding of improved varieties is the only suitable method for the present period and describes the scientific procedure of the selection and breeding of improved varieties.