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黄土区边坡陡坡段植被建植技术及应用效果
王广锋1,2
1.中铁一局集团第五工程有限公司, 陕西 宝鸡 721000;2.中铁一局集团有限公司, 陕西 西安 710000
摘要:
[目的] 研究高陡边坡区存在植被退化、植被建植困难、保水性能差、水土流失等问题,为半干旱区高陡边坡生态修复提供新的思路和借鉴作用。[方法] 提出了3种建植技术——锚索框架植生袋平铺法建植技术(A区)、锚索框架植生袋梯田法建植技术(B区)和锚索框架梯田法(C区),以解决该区建植中存在的问题,维护工程建设和运营安全。[结果] ①A区植被覆盖度最高(85%),且植物种类和株数最多;B区和C区盖度分别为60%和12%。②0—20 cm土层间,土壤含水量表现为:B区(7.72%) > A区(7.20%) > C区(4.03%);0—2 cm土层间土壤含水率:A区(5.82%) > B区(3.95%) > C区(2.88%);2—10 cm和10—20 cm间:B区 > A区 > C区。③0—20 cm土层间土壤容重表现为:A区(1.18 g/cm3) < B区(1.24 g/cm3) < C区(1.25 g/cm3);0—10 cm间:B区(1.23 g/cm3) > C区(1.19 g/cm3) > A区(1.15 g/cm3),且容重均处于适宜状态;10—20 cm土层间:A区(1.21 g/cm3) < B区(1.25 g/cm3) < C区(1.31 g/cm3),C区处于偏紧状态;④土壤侵蚀模大小为:A区(3 078 t/km2·a) < B区(3 579 t/km2·a) < C区(4 556 t/km2·a)。[结论] 利用锚索框架植生袋平铺法建植技术可显著提高植被生长状况,减少土壤侵蚀,生态修复效果显著。
关键词:  黄土区  陡坡  建植技术  土壤侵蚀模数
DOI:10.13961/j.cnki.stbctb.2020.03.035
分类号:S731.8
基金项目:宁夏回族自治区重点研发计划项目“宁夏高速铁路荒漠化防治与生态修复技术研究”(2019BFG02013);中国中铁股份有限公司引导项目“黄土边坡生态防护成套技术研究及推广应用”(2016-KJ015-Z013-03)。
Vegetation Construction Technology and Application Effect of Steep Slope in Loess Area
Wang Guangfeng1,2
1.The Fifth Engineering. Co., Ltd of China Railway First Engineering Group, Baoji, Shaanxi 721000, China;2.China Railway First Group Co., Ltd, Xi'an, Shaanxi 710000, China
Abstract:
[Objective] The problems of vegetation degradation, difficulty in vegetation construction, poor water retention, and soil erosion in high and steep slope areas was studied to provide new ideas and reference for ecological restoration of high and steep slopes in semiarid regions.[Methods] Three types of vegetation construction technique were considered:anchorage frame planting bag tiling method (plot A), anchorage frame planting bag terrace method (plot B), and anchor cable frame terrace method (plot C). These three techniques were used to solve the problems of vegetation construction in the region and maintain the safety of construction and operation.[Results] ① The maximum vegetation coverage was 85% in plot A, and the plant species and number were highest. The coverages of plot B and plot C were 60% and 12%, respectively. ② The soil moisture content of soil layers between 0 and 20 cm was as follows:B (7.72%) > A (7.20%) > C (4.03%). At 0-2 cm layer, the soil moisture content followed A (5.82%) > B (3.95%) > C (2.88%), and at 2-10 cm and 10-20 cm layers, it was B > A > C. ③ The soil bulk density of soil layers at 0-20 cm was A (1.18 g/cm3) < B (1.24 g/cm3) < C (1.25 g/cm3). At 0-10 cm, it was B (1.23 g/cm3) > C (1.19 g/cm3) > A (1.15 g/cm3), and the bulk density was in a suitable state. At 10-20 cm, it was A (1.21 g/cm3) < B (1.25 g/cm3) < C (1.31 g/cm3), and the C area was in a tight state. ④ The order of soil erosion modulus was A (3 078 t/km2·a) < B (3 579 t/km2·a) < C (4 556 t/km2·a).[Conclusion] The construction technology of the anchorage frame planting bag tiling method can significantly improve vegetation growth, reduce soil erosion, and develop ecological restoration.
Key words:  loess area  steep slope  vegetation construction technology  soil erosion modulus