侵蚀坡地草被快速恢复与控制水土流失技术

Study on the Rapid Restoration of Grass Coverage and Technique of Controlling Soil and Water Loss in Eroded Hilly Land

研究了在侵蚀坡地采用条沟-草块的特殊建植草地方法。在治理后的3个月内,用条沟-草块建植草地的小区土壤侵蚀量仅为140kg,比整地未种、原坡面和全垦等高种草的小区分别减少了823kg、249kg和670kg。用条沟-草块建植草地的小区当年土壤侵蚀为1 500 t/km2,比整地未种、原坡面和全垦等高种草分别减少了10 591t/km2、3 514t/km2和7 760t/km2;第2年以后,条沟-草块草地的土壤侵蚀量均在700 t/km2以下,严重侵蚀区减轻为轻度流失区。治理当年,植被覆盖率由原来的25%提高到85%,能在短期内控制水土流失。治理3年后坡地草被物种由6种发展到16种,促进了良性发展。

The method of planting grassland with strip trench and grass - plots was studied in eroded hillside fields. After planting grassland with strip trench and grass - plots, the amount of soil and water loss in the runoff plot is only 140kg in 3 months. Compared with the no planting with make soil preparation, the original slope surface, the contour planting with fully- reclamation, it reduced 823, 249 and 670 kg respectively. The amount of soil and water loss in the runoff plot with strip trench and grass - plots is 1500t/km^2 in this year. Compared with the no - planting with make soil preparation, the original slope surface, the contour planting with fully- reclamation, it reduced 10591, 3514, and 7760t/km^2 respectively; The amount of soil and water loss in the runoff plot with strip trench and grass - plots is under 700 t/km^2 in the next year. The species types of grass vegetation increase from 6 to 16. The coverage rate can reach 85% in the first year after controlling eroded hillside fields, and soil and water loss can control in the short time.