| 简介 |
The method of waste dump re-cultivation, particularly re-cultivation of municipal waste in which the surface of an area undergoing re-cultivation is covered with a layer of humus and sown with plants. It is characteristic that area undergoing re-cultivation is covered with a layer of humus the thickness of which varies from 0, 2 to 0, 25 m. and in spring it is planted with saplings of Boxelder Maple (Acer negundo) spaced from 0, 8 x 0, 6 m to 0, 8 x 0, 8 m. During the vegetation period from spring to late autumn at least one aeration of land is carried out with a rotary cultivator. In the first year of vegetation it is fertilized with mineral fertilizers containing assimilable nitrogen, phosphorus and potassium in the ratio 1 : 1 : 1 per pure element in the amount of 10 g to 50 g per m2 of the surface area undergoing re-cultivation. While in the second and third year of the growing year soil samples are taken from the depth of 25 cm to 40 cm together with samples of wood pulp and determination of nitrogen, phosphorus and potassium is carried out. Then the amount and the relationship of these elements is adjusted to the results obtained. In the fourth year of vegetation an observation shall be made and, depending on the observed symptoms of deficiency of one element, proper fertilization shall be applied. Whereas in the fifth year of vegetation, in autumn, plants shall be cut down at a height of not more than 5 cm from the ground level and in the sixth year of cultivation, in spring, a few shoots growing out at each trunk are allowed to grow free so that in autumn the strongest shoot can be left and the perennial cycle can be repeated. |
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