The invention discloses a chemical method for changing the weak
ecological environment of a
loess area and increasing the
arable land. The method includes the steps of firstly, bulldozing and leveling
loess hills, table lands, ridges and other places needing to be improved; secondly, measuring the before-improvement compactness,
permeability coefficient and
water content of
loess; thirdly, conducting sprinkling-
irrigation of a grouting material on the places needing to be improved, wherein the grouting material infiltrates downwards along perpendicular
columnar jointing of loess, and when reaching a preset underground position, the grouting material rapidly expands and cures so as to block the perpendicular
columnar jointing so that the effect of a water-resisting layer can be achieved; fourthly, the
water content of improved soil is increased, so the water molecules of the soil can infiltrate and break the
microstructure and perpendicular
columnar jointing of loess, and the permeability or
permeability coefficient of the improved soil is tested; fifthly, the
water content of the improved soil is detected, and plantable plants are determined. The method has the advantages that the
microstructure of soil is changed, water can infiltrate the structure of the soil, and the weak
ecological environment of the loess area is effectively improved.