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我们遵照毛主席关于“有了优良品种,即不增加劳力、肥料,也可获得较多的收成”的教导,开展了群众性的园林植物选种工作,对一些主要树种进行了初步调查观察,选择出几个单株优良类型,作为今后苗木繁殖采集种条的母本,这也是提高园林绿化效能的途径之一。一、铅笔柏:又称北美园柏,常绿乔木,适应性强,生长较快,树冠美丽,并有许多变型。我们于1973年曾调查了三个地方的铅笔柏。根据树形的变异,可以明显地分为园柱形和园锥形两大类型(表一):
In accordance with Chairman Mao’s teachings on “excellent varieties, that is, we can get more crops without increasing labor, fertilizers,” we conducted mass selection of garden plants and carried out preliminary investigations and observations on some major tree species, Select a few good type of plant, seedlings as the future seedling breeding stock, which is one of ways to improve the efficiency of landscaping. First, the pencil Parker: also known as North Park Parker, evergreen trees, adaptable, fast growth, beautiful canopy, and many variants. We surveyed pencil pallets in three places in 1973. According to the variation of the tree, it can be obviously divided into two types: cylindrical and conic (Table 1):