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苗木茎粗是衡量苗木质量的一项重要指标。在长城以北,若以插条直接扦插建园;当年秋季通常对苗木留2—3芽回缩,此时苗木茎粗则成为衡量苗木健壮程度的唯一标志。据笔者对张家口地区龙眼品种插植园的连续多年调查,插植当年秋苗木茎粗与第二、三年的生长量,第三、四年的产量呈显著的正相关。了解苗木茎粗与根、冠的相互关系,对研究制定苗
Seedling stem diameter is a measure of seedling quality is an important indicator. In the north of the Great Wall, if cuttings are directly cut and set in the garden, in autumn of the year, 2-3 buds are usually retracted. At this moment, the seedling stem diameter becomes the only sign to measure the seedling’s robustness. According to the author for many years of continuous investigation of the longan plantation in Zhangjiakou area, there was a significant positive correlation between the autumn seedling stem diameter and the second and third year’s growth and the third and fourth year’s yield when planting. Understanding seedling stem diameter and root, the relationship between the crown, the research to develop seedlings