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铅笔柏为柏科常绿乔木,生长迅速,适应性强,是优良的绿化和用材树种。近年来,本场已用于荒山造林,但由于种源缺乏,播种育苗出苗率低,因此大面积造林深感苗木不足。1987年在播种育苗失败的情况下,采用芽移育苗获得了成功。每公斤种子出苗3.78万株,较好地解决了铅笔柏造林苗木不足问题。现将具体做法介绍如下: 种子处理 铅笔柏种壳坚硬,不易吸水萌发,需经催芽处理;同时,苗期易发生猝倒病、立枯病,要进行消毒。具体采用以下处理方法: (一)层积砂藏 本场铅笔柏种子系江苏省农林厅从美国引进的。于1月上旬从本县领回,1月1.1日进行层积砂藏。方法是:首先选择平坦、向阳不积水的地方,铲平铺湿砂5厘米厚,再在其上铺一层湿纱布,然后将用30—40℃温水浸过一天的种子,铺撒在湿纱布上,厚度3—5厘米,在种子上仍用湿纱布覆盖,并铺湿砂。第二层方式,厚度与第一层相
Pencil cypress Parker evergreen trees, rapid growth, adaptability, is an excellent afforestation and timber species. In recent years, the field has been used for afforestation in the barren hills, but due to the lack of provenances, seedling emergence rate is low, so large afforestation deep shortage of seedlings. In 1987, in the case of unsuccessful sowing seedlings, the use of bud nursery success. 3.78 million seedlings per kilogram of seedlings, a better solution to the lack of pencil cypress seedling shortage. The specific practices are introduced as follows: Seed treatment Pencil cypresses hard shell, easy to germination, subject to germination treatment; the same time, seedling prone to damping off disease, blight, to be disinfected. The following specific treatment methods: (A) stratified sand collection The field of pencil cypress seedlings Department of Agriculture and Forestry in Jiangsu Province imported from the United States. In January early from the county collar back, January 1.1 stratified sand reservoir. The method is as follows: First, select a flat, sunny place without water, shovel the wet sand 5 cm thick, and then covered with a layer of wet gauze, and then 30-40 ℃ warm water soaked seeds for one day, sprinkled on Wet gauze, the thickness of 3-5 cm, the seeds are still covered with wet gauze, and shop wet sand. The second way, the thickness of the first phase