论文部分内容阅读
山西省林学会造林专业委员会樟子松科技协作组,继1685年调查总结了一龄播种苗的经验后,1986年9月又深入重点,进行了20余天的调查,主要总结移植苗的培育经验。此次共调查了16个育苗、造林单位,425块样地,实测了2296株苗,取得了大量数据。为了保证调查精度,统一方法和标准,调查中一律按照我国国家标准《育苗技术规程》苗木调查方法的内容和要求进行,并视情况做一些必要的补充调查。对抽查的样株按地径与苗高排序,挖取较好苗和一般苗的代表株各10株,再测量苗重和根系情况。计算
Following the survey of 1685, Summarizing the experiences of the first sowing seedlings, the cooperative team of Pinus sylvestris var. Mongolica of Afforestation Commission of Shanxi Forestry Society made further investigations in September 1986 and carried out more than 20 days of investigation, mainly summarizing the training experience of transplanting seedlings . The survey of a total of 16 nurseries, afforestation units, 425 plots, measured 2296 plants, and made a lot of data. In order to ensure the accuracy of survey, the uniform methods and standards, all the surveys shall be carried out in accordance with the content and requirements of the seedling survey method of “National Technical Standards for Nursery” of our country and some necessary supplementary surveys as the case may be. On the sampling of the sample according to the diameter and height of the seed sorting, digging the representative of the better seedlings and seedlings of 10 strains each, and then measure the seedling weight and root system. Calculate