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一前言 側柏(Biota orientalis)是我国华北地区重要常綠針叶树种之一,也是整个黄河流域水土保持林及防护林的一个主要树种,此外在城市綠化方面,也相当需要。我們为了确定單位面积合宜的側柏苗量,曾于1953—1954年連續进行兩年侧柏的育苗試驗,当时共分四种播种法,即窄条四行播、寬条三行播、与中槐混播及撒播等。經試驗結果以撒播法产苗量最高,每公頃产苗693万株,苗高20厘米以上,地际直徑2—4
I. INTRODUCTION Biota orientalis is one of the most important evergreen conifers in North China. It is also a major tree species of soil and water conservation forests and shelterbelts throughout the Yellow River Basin. In addition, Biota orientalis is also quite necessary for urban greening. In order to determine the appropriate unit area Arborvitae Miao volume, once in 1953-1954 years of continuous cultivation of Platycladus orientalis trial, was divided into four kinds of sowing method, that is narrow four sowing, wide three sowing, and Zhonghuai mixed broadcast and broadcast and so on. The test results to sowing the law to produce the highest amount of seedlings per hectare 6930000 seedlings, seedling height of 20 cm above the ground diameter of 2-4