作者：admin 发布时间：2019-02-07 18:24 浏览： 次[返回]
土壤是花草树木生长的基础，土壤中的土粒最好是构成团粒结构。一般情况下，表土具有大量养料和有用的土壤团粒结构，而在改造地形时，往往剥去表土，这样不能确保植物有良好的生长条件，因此应保存原有表土，在栽植时予以有效利用。在表土的采取及其复原过程中，为防止重型机械进入现场压实土壤，避免团粒结构遭到破坏，最好使用倒退铲车掘取表土，并按照一个方向进行，表土最好直接平铺在预定栽植的场地，不要临时堆放，防止地表固结。掘取、平铺表土作业不能在雨后进行，施工时的地面状况应该十分干燥，机械不得反复碾压。为避免在复原的地面形成滞水层，平铺时要很好地耕耘。Soil is the basis for the growth of plants and trees, and the soil grains in the soil should be composed of aggregates. In general, topsoil has a large amount of nutrients and useful soil aggregate structure, while topsoil is often peeled off during topographic transformation, which can not ensure that plants have good growth conditions. Therefore, the original topsoil should be preserved and effectively utilized during planting. In order to prevent heavy machinery from entering the site to compact the soil and destroy the aggregate structure, it is better to excavate the topsoil with a retrograde forklift and proceed in one direction. The topsoil should be laid directly on the planned planting site and not temporarily stacked to prevent the consolidation of the ground. Excavation and paving of topsoil can not be carried out after rain. The ground condition during construction should be very dry and the machinery should not be repeatedly rolled. In order to avoid the formation of stagnant water layer on the restored ground, good tillage should be done when laying.