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池杉是耐水湿,抗性较强,生长快,树干通直,材质好,已在我省平原湖区广为栽培。发展迅速。而我省山区、丘陵区水库的四周,存在大面积的水淹地不能植树,这些地方4—7月还积水,如果栽上池杉,不但可以获得经济效益,还可以减少水土流失和美化环境。我们为此对宁乡县田坪水库四周栽植的池杉作了一些调查调查结果表明,池杉与水的关系密切,水对池杉的生长发育有着很大的影响。池杉幼林可以耐4个月的水淹而不降低其成活率,只是延缓了生长(见表1)。林地地下水位高低是影响池杉生长的一个重要因素。同一时间,用同样的苗木,
Ipomoea japonicus is wet and water resistant, strong resistance, fast growth, trunk straight, good material, has been widely cultivated in the Plain Lake area. develop rapidly. In our province, mountains and hilly areas around the reservoir, there is a large area of flooded land can not be planted in these areas from April to July is also stagnant water, if planted Taxanum, not only can be economic benefits, but also can reduce soil erosion and landscaping surroundings. We have done some surveys on Ipomoea cetatus planted around the Tianping Reservoir in Ningxiang County. The results show that the taxa are closely related to water, and water has a great impact on the growth and development of Ipomoea cairn. Crypthecophyta can tolerate flooding for 4 months without reducing its survival rate, but retard growth (Table 1). The groundwater level in forest land is an important factor affecting the growth of Taxodium ascendens. At the same time, with the same seedlings,