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在大兴安岭林区,由于大面积的皆伐或火烧,在地下水位较高的低洼地区形成了大面积的水湿地.就水湿地来说,水分多、养分多、土壤空气少,树木很难生长.那么,如何利用和改造水湿地就成为摆在我们林业工作者面前的重要课题.目前,各林业局通常的做法是:在水湿地上用机械整地,打出大垄,规格为50×50厘米～100×100厘米不等,垄沟内排水或存水,垄台上栽植兴安落叶松.从栽植的落叶松的生长状况来看,有的生长良好,有的生长不良,甚至死亡.分析其原因:从垄台提供给兴安落叶松的土壤空间(垄大土壤空间就大些,垄小土壤空间就小些)来看,树木在达到中龄林以前,这个空间是可以维持落叶松生长的,但到中龄林以后,这个空间就难以满足落叶松
In the Greater Xing’an Mountains, due to the large area of clear-cut or fire, large-scale water wetlands are formed in the low-lying areas with high groundwater levels. In the case of wetlands, water is more humid and has more nutrients and less soil air, and the trees are hard to grow So, how to utilize and reconstruct water wetlands has become an important issue facing our forestry workers.At present, the common practice of various forestry bureaus is to land a large ridge on the water wet land mechanically with a size of 50 × 50 centimeters ~ 100 × 100 cm, drainage or water storage within the furrows, Larix larch planted from the growth of planting larch, some good growth, and some poor growth, or even death.Analysis of the reasons : From the ridge to Larix gmelinii the soil space (ridge soil larger on the soil, ridge small soil space is smaller), trees reach the middle-aged forest ago, this space is to maintain the growth of larch, However, after the middle-aged forest, this space is difficult to meet the larch