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毛主席教导我们:“有了优良品种,即不增加劳动力、肥料,也可获得较多的收成。”水杉生长快,干形直,材质好,适应性强,病虫害少,由于它具有这些优点,我场从一九七一年开始引进水杉栽植,到一九七五年九月为止,共发展水杉250亩,五年生的水杉平均高6.8米,平均胸径24厘米,长势良好。 现将几年来栽植水杉的情况简报如下: 一、认真规划,细致整地 我场位于黄海之滨,地下水位高,经开沟排水后,林地地下水位仍在1—1.7米左右。根据几年来造林的实践,地下水位的高低和土壤含盐量的多少是水杉造林的先决条件。水杉造林应选择地下水位在1.7米以下、排水良好、土层深厚肥沃、含盐量在0.01％左右的土地,在我场能达此标准的土地是更新十年左右、地势高的刺槐林地。更新的林地只要条、排沟水利标准加大,使地下水位降低到1.7米以下,这类林地栽植水杉成活率
Chairman Mao taught us: “With good varieties, that is, without increasing labor, fertilizer, but also get more harvest.” Metasequoia grow fast, dry straight, good material, adaptable, less pests and diseases, because it has these advantages , My field began to introduce Metasequoia plantation from 1971. By September 1975, a total of 250 hectares of Metasequoia growth have been developed. Metasequoia of five-year-olds averaged 6.8 meters high with an average diameter at breast height of 24 centimeters and was in good growth. Now the situation of Metasequoia transplanted several years are as follows: First, careful planning, meticulous preparation of the site I located in the Yellow Sea coast, groundwater level is high, after ditching drainage, the groundwater level is still about 1-1.7 meters. According to several years of afforestation practice, the level of groundwater level and the amount of soil salinity is a prerequisite for afforestation of Metasequoia. Metasequoia afforestation should choose groundwater level below 1.7 meters, well drained, deep and fertile soil, salt content of about 0.01% of the land in my field to achieve this standard of land is updated about ten years, high terrain locust forest. As long as the updated woodland, drainage ditch water standards to increase, so that the groundwater level down to 1.7 meters below the planted Metasequoia survival rate of such woodland