近两年,为了准确知道育苗成果,掌握苗木株数及质量状况,我们用抽样调查的方法调查苗木的产量和质量,调查精度均达到90％以上。并提高功效12倍。现将其方法步骤介绍如下: 一、划分调查区即按树种、育苗方式、苗木种类、苗龄等区别,全苗圃共分为六个调查区(见表1)。 In the past two years, in order to accurately know the results of nursery and grasping the number and quality of nursery stock, we surveyed the yield and quality of nursery stock by means of sampling survey, and the survey precision reached more than 90%. And improve the effectiveness of 12 times. Now the method steps are as follows: First, the division of the survey area that is by tree species, nursery methods, seedling types, seedling age differences, the whole nursery is divided into six survey areas (see Table 1).