苗木质量评价的研究现状与趋势

Current Status and Trends in Researches on Seedling Quality Evaluation

如何正确评价苗木质量的问题正受到普遍关注。本文对苗木质量评价的研究现状做了简要介绍。评价苗木质量的指标主要有苗木水分状况,矿物质含量,碳水化合物储量,芽休眠状态,形质指标,根生长潜力,抗冻性和抗逆性等。文章对以上指标的测定方法及各自的特点做了简述,并分析了存在的问题与发展方向。

Seedling quality eyaluation has become an issue of concern toall. Since 1970s, great advances have been made in researches on seedlingquality eyaluation in countries around the world. China has gained someexperiences in this field since the mid 1980s. But more work needs to be doneand researches need to be strengthened. At present time the main methodsof evaluating seedling quality include: (1) the techniques for determiningmoisture in seedlings, (2) mineral nutrient content as an index of seedlingquality, (3) storage of carbohydrates in seedlings, (4) bud dormancy, (5)morphological traits of seedlings. (6) root growth potential, (7) frost har- diness, and (8) stress resistance. The future trends in researches are: (1)strengthening researches on seedling physiology and biochemistry, (2) com-prehensive evaluation of seedling quality in accordance with a multipleindex, (3) developing a computer model on seedling quality that can predictseedling survival and growth of various species in particular sites on basisof test results, (4) developing a fast, easy, accurate and reliable methodof evaluating seedling quality. Other problems existing are also discussedin this paper.