CAJ | 학술논문

对兴安、灵川、阳朔等地培育的1年生银杏播种苗进行了小样方随机抽样调查，通过对苗木的地径、苗高、主根长、侧根数、根幅、顶芽饱满、木质化综合指标进行相关分析后，确定地径和苗高作为苗木分级的质量指标，用标准差法和聚类分析法对银杏苗木质量的分级标准进行了探讨比较。并结合生产实际探讨了桂北地区银杏1年生播种苗木标准：Ⅰ级苗：地径≥0.98cm，苗高≥19.94 cm；Ⅱ级苗：0.98＞地径≥0.73cm，19.94＞苗高≥17.23 cm。各指标值大于现行国家标准，能较好地反映实际生产水平，为育苗生产和制定地方标准提供参考。
대흥안、령천、양삭등지배육적1년생은행파충묘진행료소양방수궤추양조사，통과대묘목적지경、묘고、주근장、측근수、근폭、정아포만、목질화종합지표진행상관분석후，학정지경화묘고작위묘목분급적질량지표，용표준차법화취류분석법대은행묘목질량적분급표준진행료탐토비교。병결합생산실제탐토료계북지구은행1년생파충묘목표준：Ⅰ급묘：지경≥0.98cm，묘고≥19.94 cm；Ⅱ급묘：0.98＞지경≥0.73cm，19.94＞묘고≥17.23 cm。각지표치대우현행국가표준，능교호지반영실제생산수평，위육묘생산화제정지방표준제공삼고。
one year old ginkgo seedlings,which were cultivated in Xingan,Lingchuan and Yangshuo,were in-vestigated by random sampling in the small sample plots.After a correlation analysis was conducted on the compre-hensive indexes including seedling ground diameter,seedling height,taproot length,the number of lateral root ,root width,terminal bud and lignification,the ground diameter and the seedling height were determined as the two quali-ty indicators for seedling grading.And then it was studied by the standard deviation method as well as the cluster a-nalysis method.As the result,two quality grades were divided including grade I:ground diameter ≥ 0.98cm, seedling height ≥19.94 cm,and grade II:0.98 >ground diameter≥0.73cm,19.94 >seedling height ≥17. 23 cm.The index value is higher than the current national standard,and the grading standard can better reflect the actual level of production,which may provide reference for seedling production and setting the local standards.